Income Taxes (Income Tax Reconciliation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 27, 2013	Dec. 28, 2012		Dec. 30, 2011
Reconciliation between the statutory income tax rate and the effective income tax rate [Abstract]
Federal Income Taxes	$ 1,023	$ 1,040	[1]	$ 1,029	[1]
State Income Taxes	65	81	[1]	65	[1]
Other items	(30)	(13)	[1]	(8)	[1]
Income Tax Expense (Benefit)	1,058	1,108	[1]	1,086	[1]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal Income Taxes	35.00%	35.00%	[1]	34.90%	[1]
State Income Taxes	2.20%	2.80%	[1]	2.20%	[1]
Other Items	(1.00%)	(0.40%)	[1]	(0.30%)	[1]
Income Tax Rate	36.20%	37.40%	[1]	36.80%	[1]
State and Local Jurisdiction [Member]
Reconciliation between the statutory income tax rate and the effective income tax rate [Abstract]
State Income Taxes	$ (42)	$ (20)		$ (14)

[1] See the revision of prior period financial statements in Note 1. Nature of Operations and Significant Accounting Policies.