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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Net income $ 1,246 $ 930
Other comprehensive (loss) income:    
Fair market value adjustment on cash flow hedges, net of income tax (benefit) provision of ($2 million) and $2 million 4 0
Foreign currency translation 12 (9)
Total other comprehensive (loss) income 22 (2)
Comprehensive income 1,268 928
Cost of Services    
Other comprehensive (loss) income:    
Reclassification adjustment for net realized (gains) losses on cash flow hedges 0 0
Interest Expense    
Other comprehensive (loss) income:    
Reclassification adjustment for net realized (gains) losses on cash flow hedges $ 6 $ 7