CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Statement of Comprehensive Income [Abstract]    
Net income $ 207 $ 172
Other comprehensive (loss) income:    
Foreign currency translation adjustments (26) 0
Derivative instrument adjustments, net of tax 9 1
Unrealized gain on available-for-sale securities, net of tax (1) 1
Reclassification of losses (gains), net of tax (2) 1
Total other comprehensive (loss) income, net of tax (20) 3
Comprehensive income $ 187 $ 175