Other Financial Data (Investments) (Details) (USD $) In Millions, unless otherwise specified	Sep. 28, 2013	Dec. 31, 2012
Investments
Short-term Investments	$ 2	$ 2
Investments	259	240
Unrealized Gains	4	3
Unrealized Loss	(1)	0
Cost Basis	258	239
Available-For-Sale Securities [Member]
Investments
Short-term Investments	2	2
Investments	36	38
Unrealized Gains	4	3
Unrealized Loss	(1)	0
Cost Basis	35	37
U.S. Government, Agency and Government-sponsored Enterprise Obligations [Member]
Investments
Short-term Investments	0	0
Investments	17	15
Unrealized Gains	0	0
Unrealized Loss	(1)	0
Cost Basis	18	15
Corporate Bonds [Member]
Investments
Short-term Investments	2	2
Investments	6	11
Unrealized Gains	0	0
Unrealized Loss	0	0
Cost Basis	8	13
Mortgage-backed Securities [Member]
Investments
Short-term Investments	0	0
Investments	2	2
Unrealized Gains	0	0
Unrealized Loss	0	0
Cost Basis	2	2
Common Stock and Equivalents [Member]
Investments
Short-term Investments	0	0
Investments	11	10
Unrealized Gains	4	3
Unrealized Loss	0	0
Cost Basis	7	7
Other Securities, At Cost [Member]
Investments
Short-term Investments	0	0
Investments	206	189
Unrealized Gains	0	0
Unrealized Loss	0	0
Cost Basis	206	189
Equity Method Investments [Member]
Investments
Short-term Investments	0	0
Investments	17	13
Unrealized Gains	0	0
Unrealized Loss	0	0
Cost Basis	$ 17	$ 13

This element represents the aggregate carrying amount of all cost-method investments held by the Company. Generally, such investments do not have readily determinable fair values and are not required to be accounted for by the equity method. The carrying amount of such securities equates to cost, adjusted for other-than-temporary impairment. The cost method and lower-of-cost or market, an adaptation of the cost method, is generally followed for most investments in noncontrolled corporations, in some corporate joint ventures, and to a lesser extent in unconsolidated subsidiaries, particularly foreign.

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