Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (275)	$ (82)	$ (147)	$ 36
Other comprehensive income before reclassifications	(130)	(122)
Amounts reclassified from accumulated other comprehensive income	2	4
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(241)	(53)	(111)	67
Other comprehensive income before reclassifications	(130)	(120)
Amounts reclassified from accumulated other comprehensive income	0	0
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(34)	(29)	$ (36)	$ (31)
Other comprehensive income before reclassifications	0	(2)
Amounts reclassified from accumulated other comprehensive income	$ 2	$ 4