Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (301)	$ (147)	$ 36	$ 26
Other comprehensive income before reclassifications	(156)	(187)	8
Amounts reclassified from accumulated other comprehensive income	2	4	2
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(273)	(111)	67	56
Other comprehensive income before reclassifications	(162)	(178)	11
Amounts reclassified from accumulated other comprehensive income	0	0	0
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(28)	(36)	(31)	$ (30)
Other comprehensive income before reclassifications	6	(9)	(3)
Amounts reclassified from accumulated other comprehensive income	$ 2	$ 4	$ 2