Earnings Per Common Share (EPS) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2026		Sep. 30, 2025		Sep. 30, 2026		Sep. 30, 2025
Basic and diluted:
Net income	$ 3,712		$ 2,902		$ 9,794		$ 8,371
Preferred dividends	(24)		(14)		(53)		(43)
Equity-related adjustment	(16)		0		(16)		0
Net income available to common shareholders	3,672		2,888		9,725		8,328
Earnings allocated to participating share awards	(23)		(20)		(62)		(56)
Net income attributable to common shareholders, basic	3,649		2,868		9,663		8,272
Net income attributable to common shareholders, diluted	$ 3,649		$ 2,868		$ 9,663		$ 8,272
Denominator:
Basic: Weighted-average common stock (in shares)	673.0		692.0		678.0		697.0
Add: Weighted-average stock options (in shares)	1.0		1.0		1.0		1.0
Diluted (in shares)	674.0		693.0		680.0		698.0
Basic EPS (in dollars per share)	$ 5.43	[1]	$ 4.14	[1]	$ 14.24	[2]	$ 11.87	[2]
Diluted EPS (in dollars per share)	$ 5.42	[1]	$ 4.14	[1]	$ 14.22	[2]	$ 11.85	[2]
Stock Option
Denominator:
The dilutive effect of securities excluded from the calculation of earnings per share (in shares)	0.0		0.1		0.0		0.2

[1] Reflects net income less (i) earnings allocated to participating share awards of $23 million and $20 million for the three months ended September 30, 2026 and 2025, respectively, (ii) dividends on preferred shares of $24 million and $14 million for the three months ended September 30, 2026 and 2025, respectively, and (iii) an equity-related adjustment of $16 million related to the redemption of preferred shares for the three months ended September 30, 2026.

[2] Represents net income less (i) earnings allocated to participating share awards of $62 million and $56 million for the nine months ended September 30, 2026 and 2025, respectively, (ii) dividends on preferred shares of $53 million and $43 million for the nine months ended September 30, 2026 and 2025, respectively, and (iii) an equity-related adjustment of $16 million related to the redemption of preferred shares for the nine months ended September 30, 2026.