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Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Schedule of Contract Assets and Liabilities [Line Items]      
Capitalized contract costs (included in Prepayments and other current assets and Other non-current assets) $ 1,286   $ 1,220
Total accounts receivable, net 3,512   3,488
Unbilled revenues (included within Accounts receivable, net - Contracts with customers) 1,363   1,548
Deferred revenues 1,520   1,573
Deferred revenues from contracts with customers 1,500   1,500
Revenue recognized 270 $ 276  
Accounts receivable, net - Contracts with customers      
Schedule of Contract Assets and Liabilities [Line Items]      
Total accounts receivable, net 3,440   3,393
Accounts receivable, net - Accounted for under topics other than ASC 606      
Schedule of Contract Assets and Liabilities [Line Items]      
Total accounts receivable, net 69   90
Accounts receivable, net - Affiliate      
Schedule of Contract Assets and Liabilities [Line Items]      
Total accounts receivable, net $ 3   $ 5