Fair Value Measurements - Assets and Liabilities Measured at Fair Value under Certain Conditions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity Securities without Readily Determinable Fair Value, Amount	$ 468		$ 468		$ 3,311
Impairments requiring certain assets and liabilities to be measured at fair value
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount
VillageMD
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount			$ 2,700