Shareholders' Equity (Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			$ (1,641)	$ (881)
Other Comprehensive Income (Loss) before Reclassifications			133	(210)
Reclassifications			1	1
Other Comprehensive Income (Loss)	$ (9)	$ 114	134	(209)
Ending balance	(1,507)	(1,090)	(1,507)	(1,090)
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			132	(230)
Reclassifications			0	0
Other Comprehensive Income (Loss)			132	(230)
Ending balance	(1,470)	(1,043)	(1,470)	(1,043)
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	1
Other Comprehensive Income (Loss)			1	21
Ending balance	(28)	(36)	(28)	(36)
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	0
Other Comprehensive Income (Loss)			1	0
Ending balance	$ (9)	$ (11)	$ (9)	$ (11)