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Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash, Cash Equivalents and Restricted Cash:
Cash and cash equivalents		$ 76	$ 2,820
Restricted cash		130	145
Total cash, cash equivalents and restricted cash shown in the Statements of Consolidated Cash Flows		206	2,965	$ 1,158	$ 410
Allowance for Credit Losses [Member]
Movement in valuation allowances and reserves [Roll Forward]
Balance at beginning of period		53	47	12
Charged to costs and expenses		6	7	9
Charged to other accounts	[1]	1	4	29
Deductions		(6)	(5)	(3)
Balance at end of period		$ 54	$ 53	$ 47
Minor Investment [Member] | Minimum [Member]
Consolidation Policy [Abstract]
Equity method of ownership interest		3.00%
Minor Investment [Member] | Maximum [Member]
Consolidation Policy [Abstract]
Equity method of ownership interest		50.00%
Major Investment [Member] | Minimum [Member]
Consolidation Policy [Abstract]
Equity method of ownership interest		20.00%
Major Investment [Member] | Maximum [Member]
Consolidation Policy [Abstract]
Equity method of ownership interest		50.00%
[1] Amount presented for 2020 primarily relates to the reclassification of deferred revenue balances to allowance for credit losses in connection with customer bankruptcies and contractual disputes.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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