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Significant Accounting Policies - Receivables and Contracted Balances (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Jun. 30, 2022
Dec. 31, 2021
Accounting Policies [Abstract]        
Trade receivables (included in accounts receivable, net) $ 9,949 $ 8,983    
Contract liabilities (included in accrued expenses) $ 161 $ 71 $ 80 $ 87