Common, Preferred and Treasury Stock - Additional Information (Details) $ / shares in Units, $ in Millions	Dec. 31, 2023 $ / shares	Sep. 30, 2023	Jun. 30, 2023	Jul. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2019	Sep. 17, 2019 USD ($) $ / shares shares	Aug. 26, 2019 $ / shares shares	Jun. 05, 2014 USD ($) $ / shares shares	Dec. 09, 2013 USD ($) $ / shares shares	May 16, 2013 USD ($) $ / shares shares	Dec. 31, 2022 $ / shares	Jun. 30, 2019 shares
Class of Stock [Line Items]
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares	$ 25,000										$ 25,000
Number of shares authorized to be repurchased (in shares)												100,000,000
Secured Overnight Financing Rate (SOFR)
Class of Stock [Line Items]
Tenor spread adjustment on basis rate (as a percent)			0.0026161
Preferred stock, Series L
Class of Stock [Line Items]
Issuance of preferred shares (in shares)				350,000
Preferred stock, issued (in shares)				14,000
Preferred stock, dividend rate (as a percent)				4.50%
Issuance of preferred shares | $				$ 346
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares				$ 25,000
Preferred stock, redemption percentage				100.00%
Preferred stock, Series L | U.S. Treasury Rate
Class of Stock [Line Items]
Preferred stock, basis spread on variable rate (as a percent)				4.215%
Preferred Stock Series K
Class of Stock [Line Items]
Issuance of preferred shares (in shares)						10,000,000
Preferred stock, issued (in shares)						10,000
Preferred stock, dividend rate (as a percent)						4.95%
Issuance of preferred shares | $						$ 242
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares						$ 25,000
Preferred Stock Class B, Series A
Class of Stock [Line Items]
Issuance of preferred shares (in shares)							200,000
Preferred stock, dividend rate (as a percent)							6.00%
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares	$ 1,000						$ 1,000				$ 1,000
Preferred stock, Series J
Class of Stock [Line Items]
Issuance of preferred shares (in shares)								300,000
Preferred stock, issued (in shares)								12,000
Preferred stock, dividend rate (as a percent)								4.90%
Issuance of preferred shares | $								$ 297
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares								$ 25,000
Preferred stock, Series J | LIBOR
Class of Stock [Line Items]
Preferred stock, basis spread on variable rate (as a percent)					3.129%
Preferred stock, Series J | Secured Overnight Financing Rate (SOFR)
Class of Stock [Line Items]
Tenor spread adjustment on basis rate (as a percent)		0.0026161
Preferred stock, basis spread on variable rate (as a percent)		3.129%
Preferred stock, Series I
Class of Stock [Line Items]
Issuance of preferred shares (in shares)									18,000,000
Preferred stock, issued (in shares)									18,000
Preferred stock, dividend rate (as a percent)									6.625%
Issuance of preferred shares | $									$ 441
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares									$ 25,000
Preferred stock, Series I | Secured Overnight Financing Rate (SOFR)
Class of Stock [Line Items]
Preferred stock, basis spread on variable rate (as a percent)	3.71%
Preferred stock, Series H
Class of Stock [Line Items]
Issuance of preferred shares (in shares)										600,000
Preferred stock, issued (in shares)										24,000
Preferred stock, dividend rate (as a percent)										5.10%
Issuance of preferred shares | $										$ 593
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares										$ 25,000
Preferred stock, Series H | LIBOR
Class of Stock [Line Items]
Preferred stock, basis spread on variable rate (as a percent)										3.033%
Preferred stock, Series H | Secured Overnight Financing Rate (SOFR)
Class of Stock [Line Items]
Tenor spread adjustment on basis rate (as a percent)	0.0026161	0.0026161
Preferred stock, basis spread on variable rate (as a percent)		3.033%