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Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000090144-15-000005","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-06-30","val":4000000,"accn":"0000090144-14-000020","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2013-04-01","end":"2013-06-30","val":4000000,"accn":"0000090144-14-000020","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01","frame":"CY2013Q2"},{"start":"2013-01-01","end":"2013-09-30","val":6000000,"accn":"0000090144-14-000024","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-07"},{"start":"2013-07-01","end":"2013-09-30","val":2000000,"accn":"0000090144-14-000024","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-07","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":20000000,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31"},{"start":"2013-01-01","end":"2013-12-31","val":20000000,"accn":"0000090144-15-000005","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-06-30","val":0,"accn":"0000090144-14-000020","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-04-01","end":"2014-06-30","val":0,"accn":"0000090144-14-000020","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01","frame":"CY2014Q2"},{"start":"2014-01-01","end":"2014-09-30","val":0,"accn":"0000090144-14-000024","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-07"},{"start":"2014-07-01","end":"2014-09-30","val":0,"accn":"0000090144-14-000024","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-07","frame":"CY2014Q3"},{"start":"2014-01-01","end":"2014-12-31","val":0,"accn":"0000090144-15-000005","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"}]}},"CapitalExpendituresIncurredButNotYetPaid":{"label":"Capital Expenditures Incurred but Not yet Paid","description":"Future cash outflow to pay for purchases of fixed assets that have occurred.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":20000000,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":27000000,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31"},{"start":"2012-01-01","end":"2012-12-31","val":27000000,"accn":"0000090144-15-000005","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":37000000,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31"},{"start":"2013-01-01","end":"2013-12-31","val":37000000,"accn":"0000090144-15-000005","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":31000000,"accn":"0000090144-15-000005","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2014"}]}},"CapitalLeaseObligationsIncurred":{"label":"Lease Obligation Incurred","description":"Amount of increase in lease obligation from new lease.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":0,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":22000000,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2013"}]}},"CapitalLeasesFutureMinimumPaymentsDue":{"label":"Capital Leases, Future Minimum Payments Due","description":"Amount of minimum lease payments for capital leases.","units":{"USD":[{"end":"2013-12-31","val":59000000,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2013Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueCurrent":{"label":"Capital Leases, Future Minimum Payments Due, Next Twelve Months","description":"Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. 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Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2013-12-31","val":2000000,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2013Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueInThreeYears":{"label":"Capital Leases, Future Minimum Payments Due in Three Years","description":"Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2013-12-31","val":3000000,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2013Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueInTwoYears":{"label":"Capital Leases, Future Minimum Payments Due in Two Years","description":"Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2013-12-31","val":2000000,"accn":"0000090144-14-000006","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2013Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueThereafter":{"label":"Capital Leases, Future Minimum Payments Due Thereafter","description":"Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. 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