Shareholders' Equity Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (881)	$ (187)
Other comprehensive income before reclassifications	(761)	(784)
Reclassifications	1	92
Stockholders' Equity, Period Increase (Decrease)		(2)
Ending balance	(1,641)	(881)	$ (187)
Other Comprehensive Income (Loss), Net of Tax	760	694	350
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(813)	(140)
Other comprehensive income before reclassifications	(789)	(763)
Reclassifications	0	90
Stockholders' Equity, Period Increase (Decrease)		0
Ending balance	(1,602)	(813)	(140)
Other Comprehensive Income (Loss), Net of Tax	(789)	(673)
Defined Benefit Pension [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(57)	(38)
Other comprehensive income before reclassifications	28	(21)
Reclassifications	0	2
Stockholders' Equity, Period Increase (Decrease)		0
Ending balance	(29)	(57)	(38)
Other Comprehensive Income (Loss), Net of Tax	28	(19)
Deferred Loss on Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(11)	(9)
Other comprehensive income before reclassifications	0	0
Reclassifications	1	0
Ending balance		(11)	$ (9)
Other Comprehensive Income (Loss), Net of Tax	$ 1	$ (2)