Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Schedule of Contract Assets and Liabilities [Line Items]
Capitalized contract costs (included in Prepayments and other current assets and Other non-current assets)	$ 807		$ 706
Total accounts receivable, net	3,325		3,542
Unbilled revenues (included within Accounts receivable, net - Contracts with customers)	1,293		1,493
Deferred revenues	1,569		1,634
Deferred revenues from contracts with customers	1,500		1,600
Revenue recognized	276	$ 168
Accounts receivable, net - Contracts with customers
Schedule of Contract Assets and Liabilities [Line Items]
Total accounts receivable, net	3,207		3,395
Accounts receivable, net - Accounted for under topics other than ASC 606
Schedule of Contract Assets and Liabilities [Line Items]
Total accounts receivable, net	104		136
Accounts receivable, net - Affiliate
Schedule of Contract Assets and Liabilities [Line Items]
Total accounts receivable, net	$ 14		$ 11