Stockholders' Equity - Stock Repurchase Program (Details) $ / shares in Units, shares in Millions		1 Months Ended			12 Months Ended
	Oct. 29, 2021 segment	Jan. 31, 2022 shares	Dec. 31, 2021 USD ($) shares	Oct. 31, 2021 USD ($) shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($)	Feb. 29, 2024 USD ($)	Feb. 28, 2022 USD ($)
Equity, Class of Treasury Stock [Line Items]
Authorized repurchase amount									$ 4,000,000,000
Number of shares repurchased under the ASR agreement | shares		3.3	3.4			36.0
Accelerated share repurchase, average price per share (in usd per share) | $ / shares						$ 69.43
Number of financial institutions with ASR agreements | segment	2
Value of shares repurchased					$ 1,401,000,000
Shares repurchased (in shares) | shares					32.0
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Authorized repurchase amount								$ 2,000,000,000
Treasury stock at cost:
Equity, Class of Treasury Stock [Line Items]
Value of shares repurchased					$ 1,412,000,000	$ 3,331,000,000	$ 6,856,000,000
Accelerated share repurchases
Equity, Class of Treasury Stock [Line Items]
Value of shares repurchased				$ 2,500,000,000
Shares repurchased (in shares) | shares				29.3
Unsettled forward contract for share repurchase				$ 188,000,000
Accelerated share repurchases | Treasury stock at cost:
Equity, Class of Treasury Stock [Line Items]
Forward contract settled						$ 188,000,000
Value of shares repurchased			$ 188,000,000	$ 2,100,000,000