Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Change in fair value of available-for-sale securities, income tax	$ 0	$ 0	$ 0	$ 0
Available-for-sale securities, reclassification to earnings, income tax	0	0	0	0
Foreign currency translation adjustments, income tax	1	1	(7)	3
Foreign currency, reclassification to earnings, income tax	0	0	0	0
Change in derivative fair value, income tax	6	0	52	(28)
Derivative reclassification to earnings, income tax	(10)	(8)	(23)	(30)
Pension, amortization of net actuarial loss, income tax	(3)	(6)	(4)	(20)
Pension, prior service costs, income tax	0	0	(1)	0
Pension, net actuarial gain (loss) for the the period, income tax	$ 0	$ 0	$ (9)	$ 0