Income Taxes (Income Tax Expense (Benefit)) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
United States		$ 29	$ 5	$ 2
Other nations		230	89	30
States (U.S.)		12	1	3
Current income tax expense		271	95	35
United States		(283)	296	(118)
Other nations		40	(12)	111
States (U.S.)		12	(42)	(31)
Deferred income tax expense (benefit)	25	(231)	242	(38)
Total income tax expense (benefit)		$ 40	$ 337	$ (3)