The amount of additional members of the board of directors to be elected by preferred stock holders if and when dividends have not been declared and paid in full for at least six quarterly dividend periods or their equivalent (whether or not consecutive).

No definition available.

Capital Structure - Narrative (Details)	1 Months Ended	12 Months Ended
Capital Structure - Narrative (Details)	Dec. 31, 2025 USD ($) director $ / shares shares	Dec. 31, 2025 USD ($) director $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($)
Class of Stock [Line Items]
Long-term debt	$ 7,490,000,000	$ 7,490,000,000	$ 8,085,000,000
Additional borrowing capacity under credit facility increase provision	500,000,000	$ 500,000,000
Maximum debt to capital ratio allowed under credit facility covenant (as a percent)		37.50%
Interest paid on debt		$ 395,000,000	395,000,000	$ 355,000,000
Other liabilities and accrued expenses	$ 258,000,000	$ 258,000,000	$ 215,000,000
Common stock
Common stock, shares, issued (in shares) \| shares	900,000,000	900,000,000	900,000,000
Common stock, shares, outstanding (in shares) \| shares	260,000,000	260,000,000	265,000,000
Treasury stock, shares (in shares) \| shares	640,000,000	640,000,000	635,000,000
Reacquired shares (in shares) \| shares		6,000,000
Reissued net shares under equity incentive plans (in shares) \| shares		1,000,000
Preferred stock
Preferred stock, par value (in dollars per share) \| $ / shares	$ 1	$ 1	$ 1
Noncumulative Perpetual Preferred Stock
Preferred stock
Preferred stock, par value (in dollars per share) \| $ / shares	1.00	1.00
Preferred stock, shares liquidation preference (in dollars per share) \| $ / shares	25,000	25,000
Preferred stock, redemption price (in dollars per share) \| $ / shares	$ 25,000	$ 25,000
Period after occurrence of certain tax and rating agency events in which redemption of debt in whole permissible		90 days
Maximum \| Noncumulative Perpetual Preferred Stock
Preferred stock
Additional members of the board of directors \| director	2	2
Preferred stock, redemption price (in dollars per share) \| $ / shares	$ 25,500	$ 25,500
Minimum \| Noncumulative Perpetual Preferred Stock
Preferred stock
Preferred stock, redemption price (in dollars per share) \| $ / shares	$ 25,000	$ 25,000
Commercial Paper
Class of Stock [Line Items]
Commercial paper maximum borrowing capacity	$ 750,000,000	$ 750,000,000
Amount of commercial paper outstanding	0	0	$ 0
Commercial Paper \| Revolving Credit Facility
Class of Stock [Line Items]
Commercial paper maximum borrowing capacity	750,000,000	$ 750,000,000
Senior Notes \| Senior Notes Due 2025 at 0.750 Percent
Class of Stock [Line Items]
Repayments of senior debt	$ 600,000,000
Stated interest rate (as a percent)	0.75%	0.75%
Subordinated Debentures
Class of Stock [Line Items]
Minimum principal outstanding amount for redemption of debt in whole or in part	$ 25,000,000	$ 25,000,000
Subordinated Debentures Due January 14, 2023
Class of Stock [Line Items]
Debt instrument, face amount	500,000,000	$ 500,000,000
Interest rate spread overSOFR (as a percent)		3.427%
Subordinated Debentures Due August 14, 2023
Class of Stock [Line Items]
Debt instrument, face amount	$ 800,000,000	$ 800,000,000
Interest rate spread overSOFR (as a percent)		3.20%
6.500% Junior Subordinated Debentures, due 2067
Class of Stock [Line Items]
Stated interest rate (as a percent)	6.50%	6.50%
Interest rate spread overSOFR (as a percent)		0.26161%
Long-term debt	$ 500,000,000	$ 500,000,000
Debentures
Class of Stock [Line Items]
Maximum period for deferment of interest payment		10 years
Reserved common stock authorized and unissued for debentures obligations (in shares) \| shares		75,000,000
Floating Rate Subordinated Debentures, due 2053
Class of Stock [Line Items]
Debt instrument, face amount	$ 800,000,000	$ 800,000,000
7.45% Senior Notes, due 2019
Class of Stock [Line Items]
Threshold percentage of repurchase or redemption of outstanding principal debentures for non applicability of promises and covenants contained in the new RCC		10.00%
Period within which threshold percentage of outstanding principal of debentures is to be purchased for non applicability of promises and covenants contained in the new RCC		1 year
Specified period within which percentage of outstanding principal of debentures is to be purchased for non applicability of promises and covenants contained in the new RCC		10 years
7.45% Senior Notes, due 2019 \| Maximum
Class of Stock [Line Items]
Percentage of repurchase or redemption of outstanding principal debentures within specified period for non applicability of promises and covenants contained in the new RCC		25.00%