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Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.","units":{"USD":[{"end":"2016-05-01","val":299221000,"accn":"0001094739-19-000038","fy":2019,"fp":"FY","form":"10-K","filed":"2019-06-14","frame":"CY2016Q1I"},{"end":"2017-04-30","val":260228000,"accn":"0001094739-19-000038","fy":2019,"fp":"FY","form":"10-K","filed":"2019-06-14","frame":"CY2017Q1I"},{"end":"2018-04-29","val":312257000,"accn":"0001094739-19-000038","fy":2019,"fp":"FY","form":"10-K","filed":"2019-06-14"},{"end":"2018-04-29","val":312257000,"accn":"0001094739-19-000078","fy":2020,"fp":"Q1","form":"10-Q","filed":"2019-09-04","frame":"CY2018Q1I"},{"end":"2018-07-29","val":326189000,"accn":"0001094739-19-000078","fy":2020,"fp":"Q1","form":"10-Q","filed":"2019-09-04","frame":"CY2018Q2I"},{"end":"2019-04-28","val":814185000,"accn":"0001094739-19-000038","fy":2019,"fp":"FY","form":"10-K","filed":"2019-06-14"},{"end":"2019-04-28","val":814185000,"accn":"0001094739-19-000078","fy":2020,"fp":"Q1","form":"10-Q","filed":"2019-09-04","frame":"CY2019Q1I"},{"end":"2019-07-28","val":882269000,"accn":"0001094739-19-000078","fy":2020,"fp":"Q1","form":"10-Q","filed":"2019-09-04","frame":"CY2019Q2I"}]}},"CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect":{"label":"Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect","description":"Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest 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ributableToNoncontrollingInterest":{"label":"Income 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Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.","units":{"Y":[{"start":"2011-05-01","end":"2012-04-30","val":7,"accn":"0001094739-12-000015","fy":2012,"fp":"FY","form":"10-K","filed":"2012-06-29","frame":"CY2011"}]}},"PropertyPlantAndEquipmentUsefulLifeMinimum":{"label":"Property, Plant and Equipment, Useful Life, Minimum (Deprecated 2012-01-31)","description":"The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.","units":{"Y":[{"start":"2011-05-01","end":"2012-04-30","val":3,"accn":"0001094739-12-000015","fy":2012,"fp":"FY","form":"10-K","filed":"2012-06-29","frame":"CY2011"}]}},"PurchaseCommitmentRemainingMinimumAmountCommitted":{"label":"Purchase Commitment, Remaining Minimum Amount Committed","description":"Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.","units":{"USD":[{"end":"2013-04-28","val":1700000,"accn":"0001094739-13-000150","fy":2014,"fp":"Q2","form":"10-Q","filed":"2013-12-05","frame":"CY2013Q1I"},{"end":"2013-04-28","val":1700000,"accn":"0001094739-13-000127","fy":2014,"fp":"Q1","form":"10-Q","filed":"2013-09-05"},{"end":"2013-07-28","val":1900000,"accn":"0001094739-13-000127","fy":2014,"fp":"Q1","form":"10-Q","filed":"2013-09-05","frame":"CY2013Q2I"},{"end":"2013-10-27","val":1800000,"accn":"0001094739-13-000150","fy":2014,"fp":"Q2","form":"10-Q","filed":"2013-12-05","frame":"CY2013Q3I"}]}},"RealizedGainLossOnMarketableSecuritiesCostMethodInvestmentsAndOtherInvestments":{"label":"Realized Gain (Loss) on Marketable Securities, Cost Method Investments, and Other Investments","description":"This item represents the total realized gain (loss) included in earnings for the period as a result of selling marketable securities categorized as trading, available-for-sale, or held-to-maturity and any gains or losses realized during the period from the sale of investments accounted for under the cost method of accounting and/or investments that are separately or otherwise not categorized as trading, available-for-sale, or held-to-maturity. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.","units":{"USD":[{"start":"2012-05-01","end":"2013-04-28","val":0,"accn":"0001094739-15-000021","fy":2015,"fp":"FY","form":"10-K","filed":"2015-06-19","frame":"CY2012"},{"start":"2013-04-29","end":"2013-07-28","val":0,"accn":"0001094739-14-000147","fy":2015,"fp":"Q1","form":"10-Q","filed":"2014-09-04","frame":"CY2013Q2"},{"start":"2013-04-29","end":"2013-10-27","val":0,"accn":"0001094739-14-000167","fy":2015,"fp":"Q2","form":"10-Q","filed":"2014-12-04"},{"start":"2013-04-29","end":"2014-01-26","val":0,"accn":"0001094739-15-000004","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-03-05"},{"start":"2013-04-29","end":"2014-04-27","val":0,"accn":"0001094739-15-000021","fy":2015,"fp":"FY","form":"10-K","filed":"2015-06-19"},{"start":"2013-04-29","end":"2014-04-27","val":0,"accn":"0001094739-16-000131","fy":2016,"fp":"FY","form":"10-K","filed":"2016-06-17","frame":"CY2013"},{"start":"2014-04-28","end":"2014-07-27","val":0,"accn":"0001094739-14-000147","fy":2015,"fp":"Q1","form":"10-Q","filed":"2014-09-04","frame":"CY2014Q2"},{"start":"2014-04-28","end":"2014-10-26","val":0,"accn":"0001094739-14-000167","fy":2015,"fp":"Q2","form":"10-Q","filed":"2014-12-04"},{"start":"2014-04-28","end":"2015-01-25","val":0,"accn":"0001094739-15-000004","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-03-05"},{"start":"2014-04-28","end":"2015-05-03","val":0,"accn":"0001094739-15-000021","fy":2015,"fp":"FY","form":"10-K","filed":"2015-06-19"},{"start":"2014-04-28","end":"2015-05-03","val":0,"accn":"0001094739-16-000131","fy":2016,"fp":"FY","form":"10-K","filed":"2016-06-17"},{"start":"2014-04-28","end":"2015-05-03","val":0,"accn":"0001094739-17-000051","fy":2017,"fp":"FY","form":"10-K","filed":"2017-06-16","frame":"CY2014"},{"start":"2015-05-04","end":"2016-05-01","val":0,"accn":"0001094739-16-000131","fy":2016,"fp":"FY","form":"10-K","filed":"2016-06-17"},{"start":"2015-05-04","end":"2016-05-01","val":0,"accn":"0001094739-17-000051","fy":2017,"fp":"FY","form":"10-K","filed":"2017-06-16"},{"start":"2015-05-04","end":"2016-05-01","val":0,"accn":"0001094739-18-000035","fy":2018,"fp":"FY","form":"10-K","filed":"2018-06-15","frame":"CY2015"},{"start":"2016-05-02","end":"2017-04-30","val":0,"accn":"0001094739-17-000051","fy":2017,"fp":"FY","form":"10-K","filed":"2017-06-16"},{"start":"2016-05-02","end":"2017-04-30","val":0,"accn":"0001094739-18-000035","fy":2018,"fp":"FY","form":"10-K","filed":"2018-06-15","frame":"CY2016"},{"start":"2017-05-01","end":"2018-04-29","val":0,"accn":"0001094739-18-000035","fy":2018,"fp":"FY","form":"10-K","filed":"2018-06-15","frame":"CY2017"}]}},"RegistrationPaymentArrangementAccrualCarryingValue":{"label":"Registration 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common stock, at the option of the issuer or the 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