Share-Based Compensation (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Restricted Stock Units
Share-Based Compensation Awards
Value of shares, options or units vested	$ 20	$ 21
Cash paid	19	18
Performance Share Units
Share-Based Compensation Awards
Cash paid	$ 12	$ 11