Acquisition and Assets Held for Sale - Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Mar. 31, 2023	Mar. 29, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Goodwill	$ 84,057		$ 78,150
Signify Health, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents		$ 376
Accounts receivable		190
Other current assets (including restricted cash of $28)		149
Property and equipment		25
Goodwill		5,907
Intangible assets		1,920
Other long-term assets		23
Total assets acquired		8,590
Other current liabilities		609
Debt (current and long-term)		346
Deferred income taxes		256
Other long-term liabilities		26
Total liabilities assumed		1,237
Total consideration transferred		7,353
Restricted cash		$ 28