Income Taxes (Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 25, 2015	Dec. 26, 2014	Dec. 27, 2013
Earnings From Continuing Operations [Abstract]
Earnings before income taxes	$ 3,138	$ 3,044	$ 2,922
Current:
Federal	619	729	671
State	95	90	87
Subtotal Current	714	819	758
Deferred:
Federal	414	291	285
State	42	7	15
Subtotal Deferred	456	298	300
Income Tax Expense (Benefit)	$ 1,170	$ 1,117	$ 1,058