Changes in Accumulated Other Comprehensive Income Level 4 (Details) - Summary of Changes in Accumulated Other Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ 73	$ 130
Other comprehensive income before reclassifications, net of tax	(62)	3
Amounts reclassified from Accumulated other comprehensive loss, net of tax	0	0
Net Other Comprehensive Income	(62)	3
Ending Balance	11	133
Defined Benefit Pension Items [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	4	1
Other comprehensive income before reclassifications, net of tax	0	0
Amounts reclassified from Accumulated other comprehensive loss, net of tax	0	0
Net Other Comprehensive Income	0	0
Ending Balance	4	1
Foreign Currency Translation Gains Losses [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	69	129
Other comprehensive income before reclassifications, net of tax	(62)	3
Amounts reclassified from Accumulated other comprehensive loss, net of tax	0	0
Net Other Comprehensive Income	(62)	3
Ending Balance	$ 7	$ 132