Stockholders' Equity - Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	$ 57	$ (203)	$ 200	$ (395)
Tax Effect	(12)	(2)	(42)	16
Net	45	(205)	158	(379)
Currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	25	(197)	81	(343)
Tax Effect	0	0	0	0
Net	25	(197)	81	(343)
Cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	23	(10)	61	(34)
Tax Effect	(9)	2	(20)	8
Net	14	(8)	41	(26)
Pension and other postretirement benefits plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	10	9	62	(17)
Tax Effect	(3)	(4)	(22)	8
Net	7	5	40	(9)
Available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	(1)	(5)	(4)	(1)
Tax Effect	0	0	0	0
Net	(1)	(5)	(4)	(1)
Noncontrolling Interests
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	0	(6)	2	(8)
Tax Effect	0	0	0	0
Net	0	(6)	2	(8)
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	57	(197)	198	(387)
Tax Effect	(12)	(2)	$ (42)	16
Net	$ 45	$ (199)		$ (371)