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Revenue Recognition - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Lease income $ 337 $ 332    
Percent of operating revenue 7.00% 7.00%    
Revenue recognized $ 395 $ 425    
Contract with Customer, Liability     $ 841 $ 950
Minimum        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Contract term 1 year      
Maximum        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Contract term 5 years      
Weighted Average | Consumer Customers        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Length of customer life 32 months      
Weighted Average | Business Customers        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Length of customer life 30 months