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Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.","units":{"USD":[{"end":"2019-06-30","val":0,"accn":"0000110019-19-000012","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-01","frame":"CY2019Q2I"},{"end":"2019-09-30","val":0,"accn":"0000110019-19-000015","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-10-31","frame":"CY2019Q3I"}]}},"LineOfCreditFacilityCommitmentFeePercentage":{"label":"Line of Credit Facility, Commitment Fee Percentage","description":"The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.","units":{"pure":[{"start":"2012-01-01","end":"2012-12-31","val":0.002,"accn":"0001193125-13-080291","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-27","frame":"CY2012"}]}},"LineOfCreditFacilityMaximumBorrowingCapacity":{"label":"Line of Credit Facility, Maximum Borrowing Capacity","description":"Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.","units":{"USD":[{"end":"2012-06-30","val":400000000,"accn":"0001193125-12-330323","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":400000000,"accn":"0001193125-12-443885","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-10-31","frame":"CY2012Q3I"},{"end":"2012-12-31","val":400000000,"accn":"0001193125-13-080291","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-27","frame":"CY2012Q4I"},{"end":"2013-03-31","val":400000000,"accn":"0001193125-13-206376","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-08","frame":"CY2013Q1I"}]}},"LongTermDebt":{"label":"Long-term Debt","description":"Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","units":{"USD":[{"end":"2012-12-31","val":694027000,"accn":"0000110019-14-000003","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-26","frame":"CY2012Q4I"},{"end":"2013-12-31","val":694224000,"accn":"0000110019-14-000003","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-26"},{"end":"2013-12-31","val":694224000,"accn":"0000110019-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2013Q4I"},{"end":"2014-12-31","val":694420000,"accn":"0000110019-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25"},{"end":"2014-12-31","val":692488000,"accn":"0000110019-16-000016","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-24","frame":"CY2014Q4I"},{"end":"2015-12-31","val":693420000,"accn":"0000110019-16-000016","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-24"},{"end":"2015-12-31","val":693420000,"accn":"0000110019-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22","frame":"CY2015Q4I"},{"end":"2016-12-31","val":519160000,"accn":"0000110019-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22"},{"end":"2016-12-31","val":334236000,"accn":"0000110019-18-000003","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2016Q4I"},{"end":"2017-12-31","val":331748000,"accn":"0000110019-18-000003","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2017Q4I"},{"end":"2018-12-31","val":576168000,"accn":"0000110019-20-000003","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-24","frame":"CY2018Q4I"},{"end":"2019-12-31","val":577045000,"accn":"0000110019-20-000003","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-24"},{"end":"2019-12-31","val":577045000,"accn":"0000110019-21-000003","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-24","frame":"CY2019Q4I"},{"end":"2020-12-31","val":578018000,"accn":"0000110019-21-000003","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-24"},{"end":"2020-12-31","val":578018000,"accn":"0000110019-22-000004","fy":2021,"fp":"FY","form":"10-K","filed":"2022-02-28","frame":"CY2020Q4I"},{"end":"2021-12-31","val":579030000,"accn":"0000110019-22-000004","fy":2021,"fp":"FY","form":"10-K","filed":"2022-02-28"},{"end":"2021-12-31","val":579030000,"accn":"0000110019-23-000004","fy":2022,"fp":"FY","form":"10-K","filed":"2023-02-27","frame":"CY2021Q4I"},{"end":"2022-12-31","val":580083000,"accn":"0000110019-23-000004","fy":2022,"fp":"FY","form":"10-K","filed":"2023-02-27"},{"end":"2022-12-31","val":580083000,"accn":"0000110019-24-000003","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-21","frame":"CY2022Q4I"},{"end":"2023-12-31","val":581178000,"accn":"0000110019-24-000003","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-21","frame":"CY2023Q4I"}]}},"LongTermDebtCurrent":{"label":"Long-term Debt, Current Maturities","description":"Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","units":{"USD":[{"end":"2014-12-31","val":0,"accn":"0000110019-15-000010","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-07-30"},{"end":"2014-12-31","val":0,"accn":"0000110019-15-000013","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-29"},{"end":"2014-12-31","val":0,"accn":"0000110019-16-000016","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-24","frame":"CY2014Q4I"},{"end":"2015-06-30","val":174947000,"accn":"0000110019-15-000010","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-07-30","frame":"CY2015Q2I"},{"end":"2015-09-30","val":174961000,"accn":"0000110019-15-000013","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-10-29","frame":"CY2015Q3I"},{"end":"2015-12-31","val":174837000,"accn":"0000110019-16-000016","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-24"},{"end":"2015-12-31","val":174837000,"accn":"0000110019-16-000019","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-05"},{"end":"2015-12-31","val":174837000,"accn":"0000110019-16-000022","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-02"},{"end":"2015-12-31","val":174837000,"accn":"0000110019-16-000025","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-10-31"},{"end":"2015-12-31","val":174837000,"accn":"0000110019-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22","frame":"CY2015Q4I"},{"end":"2016-03-31","val":174926000,"accn":"0000110019-16-000019","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-05","frame":"CY2016Q1I"},{"end":"2016-06-30","val":184843000,"accn":"0000110019-16-000022","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-02","frame":"CY2016Q2I"},{"end":"2016-09-30","val":184858000,"accn":"0000110019-16-000025","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-10-31","frame":"CY2016Q3I"},{"end":"2016-12-31","val":184924000,"accn":"0000110019-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22"},{"end":"2016-12-31","val":184924000,"accn":"0000110019-17-000006","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-04"},{"end":"2016-12-31","val":184924000,"accn":"0000110019-17-000008","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-03"},{"end":"2016-12-31","val":184924000,"accn":"0000110019-17-000012","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-02"},{"end":"2016-12-31","val":184924000,"accn":"0000110019-18-000003","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2016Q4I"},{"end":"2017-03-31","val":0,"accn":"0000110019-17-000006","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-04","frame":"CY2017Q1I"},{"end":"2017-06-30","val":249737000,"accn":"0000110019-17-000008","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-03","frame":"CY2017Q2I"},{"end":"2017-09-30","val":249805000,"accn":"0000110019-17-000012","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-02","frame":"CY2017Q3I"},{"end":"2017-12-31","val":249874000,"accn":"0000110019-18-000003","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22"},{"end":"2017-12-31","val":249874000,"accn":"0000110019-18-000006","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-03"},{"end":"2017-12-31","val":249874000,"accn":"0000110019-18-000009","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-02"},{"end":"2017-12-31","val":249874000,"accn":"0000110019-18-000012","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-01"},{"end":"2017-12-31","val":249874000,"accn":"0000110019-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-21","frame":"CY2017Q4I"},{"end":"2018-03-31","val":249943000,"accn":"0000110019-18-000006","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-05-03","frame":"CY2018Q1I"},{"end":"2018-06-30","val":0,"accn":"0000110019-18-000009","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-02","frame":"CY2018Q2I"},{"end":"2018-09-30","val":0,"accn":"0000110019-18-000012","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-01","frame":"CY2018Q3I"},{"end":"2018-12-31","val":0,"accn":"0000110019-19-000003","fy":2018,"fp":"FY","form":"10-K","filed":"2019-02-21","frame":"CY2018Q4I"}]}},"LongTermDebtMaturingInYearsFourAndFive":{"label":"Long-Term Debt, Maturity, Year Four and Five","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth and fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-12-31","val":360000000,"accn":"0001193125-13-080291","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-27","frame":"CY2012Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths":{"label":"Long-Term Debt, Maturity, Year One","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2015-12-31","val":175000000,"accn":"0000110019-16-000016","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-24","frame":"CY2015Q4I"},{"end":"2016-12-31","val":185000000,"accn":"0000110019-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22","frame":"CY2016Q4I"},{"end":"2017-12-31","val":250000000,"accn":"0000110019-18-000003","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2017Q4I"},{"end":"2019-12-31","val":0,"accn":"0000110019-20-000003","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-24","frame":"CY2019Q4I"},{"end":"2020-12-31","val":0,"accn":"0000110019-21-000003","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-24","frame":"CY2020Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive":{"label":"Long-Term Debt, Maturity, Year Five","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-12-31","val":185000000,"accn":"0001193125-13-080291","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-27","frame":"CY2012Q4I"},{"end":"2013-12-31","val":250000000,"accn":"0000110019-14-000003","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-26","frame":"CY2013Q4I"},{"end":"2014-12-31","val":250000000,"accn":"0000110019-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2014Q4I"},{"end":"2017-12-31","val":0,"accn":"0000110019-18-000003","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2017Q4I"},{"end":"2019-12-31","val":0,"accn":"0000110019-20-000003","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-24","frame":"CY2019Q4I"},{"end":"2020-12-31","val":85000000,"accn":"0000110019-21-000003","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-24","frame":"CY2020Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour":{"label":"Long-Term Debt, Maturity, Year Four","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-12-31","val":175000000,"accn":"0001193125-13-080291","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-27","frame":"CY2012Q4I"},{"end":"2013-12-31","val":185000000,"accn":"0000110019-14-000003","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-26","frame":"CY2013Q4I"},{"end":"2014-12-31","val":185000000,"accn":"0000110019-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2014Q4I"},{"end":"2017-12-31","val":0,"accn":"0000110019-18-000003","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2017Q4I"},{"end":"2019-12-31","val":0,"accn":"0000110019-20-000003","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-24","frame":"CY2019Q4I"},{"end":"2020-12-31","val":0,"accn":"0000110019-21-000003","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-24","frame":"CY2020Q4I"},{"end":"2021-12-31","val":85000000,"accn":"0000110019-22-000004","fy":2021,"fp":"FY","form":"10-K","filed":"2022-02-28","frame":"CY2021Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree":{"label":"Long-Term Debt, Maturity, Year Three","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2013-12-31","val":175000000,"accn":"0000110019-14-000003","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-26","frame":"CY2013Q4I"},{"end":"2014-12-31","val":175000000,"accn":"0000110019-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25","frame":"CY2014Q4I"},{"end":"2015-12-31","val":250000000,"accn":"0000110019-16-000016","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-24","frame":"CY2015Q4I"},{"end":"2017-12-31","val":0,"accn":"0000110019-18-000003","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2017Q4I"},{"end":"2019-12-31","val":0,"accn":"0000110019-20-000003","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-24","frame":"CY2019Q4I"},{"end":"2020-12-31","val":0,"accn":"0000110019-21-000003","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-24","frame":"CY2020Q4I"},{"end":"2022-12-31","val":85000000,"accn":"0000110019-23-000004","fy":2022,"fp":"FY","form":"10-K","filed":"2023-02-27","frame":"CY2022Q4I"},{"end":"2023-12-31","val":85000000,"accn":"0000110019-24-000003","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-21","frame":"CY2023Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo":{"label":"Long-Term Debt, Maturity, Year Two","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2015-12-31","val":185000000,"accn":"0000110019-16-000016","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-24","frame":"CY2015Q4I"},{"end":"2016-12-31","val":250000000,"accn":"0000110019-17-000003","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22","frame":"CY2016Q4I"},{"end":"2017-12-31","val":0,"accn":"0000110019-18-000003","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-22","frame":"CY2017Q4I"},{"end":"2019-12-31","val":0,"accn":"0000110019-20-000003","fy":2019,"fp":"FY","form":"10-K","filed":"2020-02-24","frame":"CY2019Q4I"},{"end":"2020-12-31","val":0,"accn":"0000110019-21-000003","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-24","frame":"CY2020Q4I"}]}},"LongTermDebtNoncurrent":{"label":"Long-term Debt, Excluding Current Maturities","description":"Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. 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