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Stock Compensation (Fair Value Assumptions) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011
Stock Compensation [Abstract]
Weighted-average expected volatility	16.00%	17.00%
Weighted-average expected term (years)	7.53	6.98
Weighted-average risk-free interest rate	1.60%	3.07%
Dividend yield	3.30%	3.10%
Total intrinsic value of options exercised	$ 13	$ 56

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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