Annual report pursuant to Section 13 and 15(d)

Accumulated Other Comprehensive Income/(Loss) (Details)

v3.20.4
Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss), Net of Tax $ (25) $ (19) $ (13)  
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax   3    
Accumulated Other Comprehensive Income (Loss), Net of Tax (52) (27) (8) $ 5
Stockholders' Equity Attributable to Parent 963 1,212 1,418 1,262
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     (9)  
Stockholders' Equity Attributable to Parent 2 (1) (4) 5
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)  
Stockholders' Equity Attributable to Parent $ (54) $ (26) $ (4) $ 0