Equity (Details) shares in Millions	3 Months Ended	12 Months Ended
	Apr. 03, 2022 USD ($) shares	Dec. 31, 2023 USD ($) employeeStockOwnershipPlan	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2018 USD ($)
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares) | shares	39
Shares repurchased, cost	$ 2,000,000,000		$ 2,000,000,000
Amount of remaining shares authorized in stock purchase plan, value		$ 3,300,000,000
Number of employee stock ownership plans | employeeStockOwnershipPlan		1
Common ESOP Plan [Member]
Equity, Class of Treasury Stock [Line Items]
ESOP compensation expense		$ 20,000,000	$ 19,000,000	$ 19,000,000
December 2018 Stock Purchase Plan [Member]
Equity, Class of Treasury Stock [Line Items]
Amount of shares authorized in stock purchase plan, value					$ 10,000,000,000