Income Taxes - Additional Information (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Valuation allowance related to net operating loss carryforwards	$ 19
Foreign net operating loss carryforwards			6
Undistributed earnings of foreign subsidiaries	630
Effective income tax federal statutory rate	35.00%
Unrecognized tax benefits	67	13	36	24
Unrecognized tax benefits that would impact effective tax rate	65
Unrecognized tax benefits that would impact goodwill	2
Total gross interest and penalties accrued	4		2
Estimated unrecognized tax benefit amount	1
Singapore
Income Taxes [Line Items]
Effective income tax federal statutory rate		5.00%
Singapore's statutory tax rate		17.00%
Tax incentive agreement expiration date	Jun. 30, 2016
Agreement maturity extension period	5 years
Decrease to the 2014 tax provision	6
Increase in Diluted EPS	$ 0.04
Federal
Income Taxes [Line Items]
Operating loss carryforwards	42
Expiration date of NOLs	Between 2020 and 2033
State
Income Taxes [Line Items]
Operating loss carryforwards	36
Expiration date of NOLs	Between 2020 and 2033
Foreign
Income Taxes [Line Items]
Operating loss carryforwards	$ 84
Expiration date of NOLs	Between 2020 and 2033