Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Change in fair value of available-for-sale securities, income tax	$ 0	$ 0	$ 0	$ 1
Available-for-sale securities, reclassification to earnings, income tax	0	0	0	0
Foreign currency translation adjustments, income tax	(7)	2	(8)	2
Foreign currency, reclassification to earnings, income tax	0	0	0	0
Change in derivative fair value, income tax	22	(28)	46	(28)
Derivative reclassification to earnings, income tax	(10)	(15)	(13)	(22)
Pension, amortization of net actuarial loss, income tax	2	(7)	(1)	(14)
Pension, prior service costs, income tax	(1)	0	(1)	0
Pension, net actuarial gain (loss) for the the period, income tax	$ (9)	$ 0	$ (9)	$ 0