Shareholders' Equity (Changes in Accumulated Other Comprehensive Income (Loss)) (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), Net of Tax [Roll Forward]
Beginning balance			$ (1,641)	$ (881)
Other Comprehensive Income (Loss) before Reclassifications			(91)	569
Reclassifications			(1)	3
Other Comprehensive Income (Loss)	$ (42)	$ (357)	92	(566)
Ending balance	(1,549)	(1,447)	(1,549)	(1,447)
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(1,602)	(813)
Other Comprehensive Income (Loss) before Reclassifications			(90)	589
Reclassifications			0	0
Other Comprehensive Income (Loss)			90	(589)
Ending balance	(1,512)	(1,402)	(1,512)	(1,402)
Defined Benefit Pension [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(29)	(57)
Other Comprehensive Income (Loss) before Reclassifications			(1)	20
Reclassifications			0	2
Other Comprehensive Income (Loss)			1	22
Ending balance	(28)	(35)	(28)	(35)
Deferred Loss on Derivatives [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(10)	(11)
Other Comprehensive Income (Loss) before Reclassifications			0	0
Reclassifications			(1)	1
Other Comprehensive Income (Loss)			1	1
Ending balance	$ (9)	$ (10)	$ (9)	$ (10)