Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 22, 2014	Mar. 23, 2013	Dec. 27, 2014
Expected full year tax effect, low range			26.00%
Income Tax And Effective Tax Rate [Abstract]
Income taxes	$ 139	$ 120
Expected full year tax effect, high range			28.00%
Effective tax rate	25.90%	26.40%
Fiscal years 2004-2006 [Member] | Income Tax Expense (Benefit) [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination, Estimate of Possible Loss	700
Fiscal years 2004-2006 [Member] | Interest Expense [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination, Estimate of Possible Loss	265
Fiscal years 2007-2008 [Member] | Income Tax Expense (Benefit) [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination, Estimate of Possible Loss	270
Fiscal years 2007-2008 [Member] | Interest Expense [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination, Estimate of Possible Loss	45
Fiscal years 2009-2012 [Member] | Income Tax Expense (Benefit) [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination, Estimate of Possible Loss	140
Fiscal years 2009-2012 [Member] | Interest Expense [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination, Estimate of Possible Loss	$ 10