Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
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	1	(7)
Foreign currency, reclassification to earnings, income tax	0	0	0	0
Change in derivative fair value, income tax	22	6	22	52
Derivative reclassification to earnings, income tax	0	(10)	(6)	(23)
Pension, amortization of net actuarial gain (loss), income tax	(3)	(3)	(8)	(4)
Pension, prior service costs, income tax	0	0	0	(1)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, before Reclassification Adjustments, Tax	$ 0	$ 0	$ 0	$ (9)