Annual report pursuant to Section 13 and 15(d)

Accumulated Other Comprehensive Income/(Loss) (Details)

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Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss), Net of Tax $ (19) $ (13) $ 5  
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax 3 (9)    
Accumulated Other Comprehensive Income (Loss), Net of Tax (27) (8) 5 $ 0
Stockholders' Equity Attributable to Parent 1,212 1,418 1,262 1,086
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax     5  
Stockholders' Equity Attributable to Parent (1) (4) 5 0
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss), Net of Tax (22) (4) 0  
Stockholders' Equity Attributable to Parent $ (26) $ (4) $ 0 $ 0