Shareholders' Equity (Changes in Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (881)	$ (187)
Other comprehensive loss	(325)	(202)
Reclassifications	2
Other Comprehensive Loss	(323)	(202)
Ending balance	(1,204)	(389)
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(813)	(140)
Other comprehensive loss	(345)	(202)
Reclassifications	0
Other Comprehensive Loss	(345)
Ending balance	(1,158)	(342)
Defined Benefit Pension [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(57)	(38)
Other comprehensive loss	20	0
Reclassifications	2
Other Comprehensive Loss	22
Ending balance	(35)	(38)
Deferred Loss on Derivatives [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(11)	(9)
Other comprehensive loss	0	0
Reclassifications	0
Other Comprehensive Loss	0
Ending balance	$ (11)	$ (9)