Income Taxes (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Unrecognized Tax Benefits Rollforward (Table Amounts) [Abstract]
Unrecognized tax benefits at beginning of the year	$ 156	$ 118	$ 126
Additions based on tax positions related to the current year	56	12	11
Additions for tax positions of prior years	44	28	31
Other, net	(15)	(2)	(50)
Net change in unrecognized tax benefits	85	38	(8)
Unrecognized tax benefits at end of the year	$ 241	$ 156	$ 118