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Supplemental Financial Information (Narrative) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended 0 Months Ended
Jan. 02, 2015
Dec. 27, 2013
Jan. 02, 2015
Dec. 27, 2013
Feb. 05, 2015
Class of Stock [Line Items]          
Cash dividends declared per common share $ 0.15us-gaap_CommonStockDividendsPerShareDeclared $ 0.15us-gaap_CommonStockDividendsPerShareDeclared $ 0.45us-gaap_CommonStockDividendsPerShareDeclared $ 0.45us-gaap_CommonStockDividendsPerShareDeclared  
Dividends paid, net $ 104us-gaap_PaymentsOfDividends   $ 311us-gaap_PaymentsOfDividends $ 314us-gaap_PaymentsOfDividends  
Subsequent Event | Common Stock          
Class of Stock [Line Items]          
Cash dividends declared per common share         $ 0.15us-gaap_CommonStockDividendsPerShareDeclared
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Dividends payable, date declared         Feb. 05, 2015
Dividends payable, date to be paid         Mar. 18, 2015
Dividends payable, date of record         Feb. 26, 2015