Share-Based Compensation (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Restricted Stock Units
Share-Based Compensation Awards
Value of shares, options or units vested	$ 35	$ 41	$ 31
Intrinsic value of cash awards paid	25	23	13
Performance Share Units
Share-Based Compensation Awards
Value of shares, options or units vested	10	33	11
Intrinsic value of cash awards paid	$ 52	$ 1	$ 5