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Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 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) $ 1,479   $ 1,479   $ 1,220
Total accounts receivable, net 3,421   3,421   3,488
Unbilled revenues (included within Accounts receivable, net - Contracts with customers) 1,479   1,479   1,548
Deferred revenues 1,620   1,620   1,573
Deferred revenues from contracts with customers 1,600   1,600   1,500
Revenue recognized 285 $ 266 430 $ 395  
Accounts receivable, net - Contracts with customers          
Schedule of Contract Assets and Liabilities [Line Items]          
Total accounts receivable, net 3,347   3,347   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 70   70   90
Accounts receivable, net - Affiliate          
Schedule of Contract Assets and Liabilities [Line Items]          
Total accounts receivable, net $ 4   $ 4   $ 5