Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	$ 6	$ (23)
Other comprehensive (loss) before reclassification	(105)	28
Amounts reclassified from accumulated other comprehensive income (loss)	(16)	1
Balance at the end of the period	(115)	6
Pension and Other Post-Employment Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	(58)	(110)
Other comprehensive (loss) before reclassification	(34)	52
Amounts reclassified from accumulated other comprehensive income (loss)	(9)	0
Balance at the end of the period	(101)	(58)
Accumulated translation adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	62	106
Other comprehensive (loss) before reclassification	(57)	(45)
Amounts reclassified from accumulated other comprehensive income (loss)	0	1
Balance at the end of the period	5	62
Unrealized Losses on Terminated Net Investment Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	(19)	(19)
Other comprehensive (loss) before reclassification	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Balance at the end of the period	(19)	(19)
Unrealized Gains on Available for Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period	21	0
Other comprehensive (loss) before reclassification	(14)	21
Amounts reclassified from accumulated other comprehensive income (loss)	(7)	0
Balance at the end of the period	$ 0	$ 21