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Investments in Unconsolidated Affiliates (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Investments in and Advances to Affiliates [Line Items]
(Loss) income from investments in unconsolidated affiliates	$ (2)	$ (12)	$ (11)	$ 222
Tax expense	239	$ 147	544	382
Term Loan Facilities | Variable-Rate Term Loan Facilities Due April 2027 | Line of Credit | Lending Joint Ventures
Investments in and Advances to Affiliates [Line Items]
Maximum borrowing capacity	437		437
Long-term debt	45		45
Revolving Credit Facility | Line of Credit
Investments in and Advances to Affiliates [Line Items]
Maximum borrowing capacity	6,000		6,000
Revolving Credit Facility | Variable-Rate Revolving Credit Facilities Due April 2027 | Line of Credit | Lending Joint Ventures
Investments in and Advances to Affiliates [Line Items]
Maximum borrowing capacity	$ 83		$ 83
Sagent
Investments in and Advances to Affiliates [Line Items]
(Loss) income from investments in unconsolidated affiliates				80
Tax expense				$ 19

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