Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions				1 Months Ended		12 Months Ended
	Feb. 06, 2025	Jul. 24, 2024	Jan. 31, 2024	Jul. 31, 2024	Jan. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Sep. 16, 2024	Mar. 15, 2024	Jan. 19, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Proceeds from issuance of preferred stock, net of issuance costs						$ 2,323	$ 0	$ 0
Preferred stock cash dividend						$ 185	122	$ 112
2023 Share Repurchase Program
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of common stock authorized for repurchase							$ 4,500
Shares acquired (in shares)						0	49,200,000
Total acquired						$ 0	$ 3,800
2024 Share Repurchase Program
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount of common stock authorized for repurchase											$ 5,000
Shares acquired (in shares)						15,100,000	0
Total acquired						$ 1,300	$ 0
Series I Preferred Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares issued (in shares)			1,500,000
Ownership Interest Per Depositary Share					1.00%
Liquidation preference per share (USD per share)			$ 100,000		$ 100,000
Proceeds from issuance of preferred stock, net of issuance costs			$ 1,500
Per annum dividend rate					6.70%
Preferred stock, shares outstanding (in shares)						15,000
Preferred dividends declared (USD per share)						$ 5,863
Preferred stock cash dividend						$ 88
Series I Preferred Stock, Depository Share
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares issued (in shares)					1,500,000
Liquidation preference per share (USD per share)			$ 1,000		$ 1,000
Preferred dividends declared (USD per share)						$ 58.63
Series D Preferred Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Liquidation preference per share (USD per share)										$ 100,000
Redemption price										$ 1,000
Preferred stock, shares outstanding (in shares)						7,500				7,500
Preferred dividends declared (USD per share)						$ 1,475	$ 5,900
Preferred stock cash dividend						$ 11	$ 44
Series D Preferred Stock, Depository Share
Accumulated Other Comprehensive Income (Loss) [Line Items]
Liquidation preference per share (USD per share)										$ 25
Preferred stock, shares outstanding (in shares)										30,000,000
Preferred dividends declared (USD per share)						$ 0.37	$ 1.48
Series F Preferred Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Liquidation preference per share (USD per share)										$ 100,000
Preferred stock, shares outstanding (in shares)						2,500				2,500
Preferred dividends declared (USD per share)						$ 2,336	$ 8,935
Preferred stock cash dividend						$ 6	$ 23
Series F Preferred Stock, Depository Share
Accumulated Other Comprehensive Income (Loss) [Line Items]
Liquidation preference per share (USD per share)										$ 1,000
Preferred stock, shares outstanding (in shares)										250,000
Preferred dividends declared (USD per share)						$ 23.36	$ 89.35
Series J Preferred Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares issued (in shares)		850,000
Ownership Interest Per Depositary Share				1.00%
Liquidation preference per share (USD per share)		$ 100,000		$ 100,000
Proceeds from issuance of preferred stock, net of issuance costs		$ 842
Per annum dividend rate				6.70%
Preferred stock, shares outstanding (in shares)						8,500
Preferred dividends declared (USD per share)						$ 2,643
Preferred stock cash dividend						$ 22
Series J Preferred Stock, Depository Share
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares issued (in shares)				850,000
Liquidation preference per share (USD per share)		$ 1,000		$ 1,000
Preferred dividends declared (USD per share)						$ 26.43
Series H Preferred Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Liquidation preference per share (USD per share)									$ 100,000
Redemption price									$ 500
Preferred stock, shares outstanding (in shares)						5,000			5,000
Preferred dividends declared (USD per share)						$ 6,251	$ 5,625
Preferred stock cash dividend						$ 31	$ 28
Series H Preferred Stock, Depository Share
Accumulated Other Comprehensive Income (Loss) [Line Items]
Liquidation preference per share (USD per share)									$ 1,000
Preferred stock, shares outstanding (in shares)									500,000
Preferred dividends declared (USD per share)						$ 62.51	$ 56.25
Series K Preferred Stock | Subsequent Event
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares issued (in shares)	750,000
Ownership Interest Per Depositary Share	1.00%
Liquidation preference per share (USD per share)	$ 100,000
Proceeds from issuance of preferred stock, net of issuance costs	$ 743
Per annum dividend rate	6.45%
Series K Preferred Stock, Depository Share | Subsequent Event
Accumulated Other Comprehensive Income (Loss) [Line Items]
Liquidation preference per share (USD per share)	$ 1,000