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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2022
Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Beginning balance   $ (371)     $ (371)  
Foreign currency translation adjustment $ (41)   $ 19   (44) $ 29
Ending balance (448)       (448)  
Foreign Currency Translation            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Beginning balance (106) (101) (90) $ (86) (101) (86)
Foreign currency translation adjustment (41) (3) 19 10    
Tax on foreign currency translation adjustment (28) (2) 1 (14)    
Ending balance (175) (106) (70) (90) (175) (70)
Post-retirement Benefit Plans            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Beginning balance (265) (268) (326) (330) (268) (330)
Income tax impact on amortization of post-retirement benefit plan items (1) (1) (2) (1)    
Ending balance (262) (265) (323) (326) (262) (323)
Derivative Instruments            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Beginning balance (6) (2) (10) 3 (2) 3
Unrealized gain (loss) on derivative hedge agreements (9) (6) 4 (11)    
Income tax benefit on unrealized loss on derivative hedge agreements 1     1    
Ending balance (11) (6) (5) (10) (11) (5)
Total            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Beginning balance (377) (371) (426) (413) (371) (413)
Foreign currency translation adjustment (41) (3) 19 10    
Tax on foreign currency translation adjustment (28) (2) 1 (14)    
Income tax impact on amortization of post-retirement benefit plan items (1) (1) (2) (1)    
Unrealized gain (loss) on derivative hedge agreements (9) (6) 4 (11)    
Income tax benefit on unrealized loss on derivative hedge agreements 1     1    
Ending balance (448) (377) (398) (426) $ (448) $ (398)
Other non-operating income | Post-retirement Benefit Plans            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Amortization of prior service cost and net actuarial loss on post-retirement benefit plans into other non-operating income (expense), net 4 4 5 5    
Other non-operating income | Total            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Amortization of prior service cost and net actuarial loss on post-retirement benefit plans into other non-operating income (expense), net 4 4 5 5    
Revenue | Derivative Instruments            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Reclassification of unrealized gain (loss) on foreign exchange agreements 2 2 1 (2)    
Revenue | Total            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Reclassification of unrealized gain (loss) on foreign exchange agreements 2 $ 2 $ 1 (2)    
Cost of Revenue | Derivative Instruments            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Reclassification of unrealized gain (loss) on foreign exchange agreements       (1)    
Reclassification of unrealized loss on foreign exchange agreements into cost of revenue 1          
Cost of Revenue | Total            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Reclassification of unrealized gain (loss) on foreign exchange agreements       $ (1)    
Reclassification of unrealized loss on foreign exchange agreements into cost of revenue $ 1