Income Taxes (Income Tax Reconciliation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Reconciliation between the statutory income tax rate and the effective income tax rate [Abstract]
Federal Income Taxes	$ 1,037	$ 1,011	$ 891
State Income Taxes	80	63	85
Corporate Reorganization	0	0	16
Other items	(12)	(8)	(9)
Income Tax Expense (Benefit)	1,105	1,066	983
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal Income Taxes	35.00%	35.00%	35.00%
State Income Taxes	2.70%	2.20%	3.40%
Corporate Reogranization	0.00%	0.00%	0.60%
Other Items	(0.40%)	(0.30%)	(0.40%)
Income Tax Rate	37.30%	36.90%	38.60%
State and Local Jurisdiction [Member]
Reconciliation between the statutory income tax rate and the effective income tax rate [Abstract]
State Income Taxes	$ (20)	$ (14)