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Basis of Presentation and Summary of Significant Accounting Policies Contract Assets and Liabilities (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Accounting Policies [Abstract]      
Contract liabilities $ 625   $ 516
Contract with Customer, Liability, Noncurrent 65   $ 69
Revenue recognized that was included in contract liabilities 228 $ 255  
Remaining performance obligations $ 4,200