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Acquisitions - Preliminary Purchase Price (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 11, 2023	Jul. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Goodwill	$ 2,416			$ 2,374
Aryeo
Schedule of Equity Method Investments [Line Items]
Cash and cash equivalents			$ 3
Goodwill			26
Intangible assets			11
Other assets			0
Liabilities			(2)
Total preliminary purchase price			$ 38
Spruce
Schedule of Equity Method Investments [Line Items]
Cash and cash equivalents		$ 5
Goodwill		16
Intangible assets		2
Other assets		2
Liabilities		(1)
Total preliminary purchase price		$ 24

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