Earnings Per Share - Components of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2025		Mar. 31, 2024
Earnings Per Share [Abstract]
Net income attributable to U.S. Bancorp	$ 1,709		$ 1,319
Preferred dividends	(95)	[1]	(102)	[2]
Earnings allocated to participating stock awards	(11)		(8)
Net income applicable to U.S. Bancorp common shareholders	1,603		1,209
Net income applicable to U.S. Bancorp common shareholders, diluted	$ 1,603		$ 1,209
Average common shares outstanding (in shares)	1,559		1,559
Average diluted common shares outstanding (in shares)	1,560		1,559
Earnings per common share (in dollars per share)	$ 1.03		$ 0.78
Diluted earnings per common share (in dollars per share)	$ 1.03		$ 0.78
Net effect of the exercise and assumed purchase of stock awards (in shares)	1		0

[1] Reflects dividends declared per share on the Company’s Series A, Series B, Series J, Series K, Series L, Series M, Series N and Series O Non-Cumulative Perpetual Preferred Stock of $1,395.898, $322.724, $662.50, $343.75, $234.375, $250.00, $231.25 and $281.25, respectively.

[2] Reflects dividends declared per share on the Company’s Series A, Series B, Series J, Series K, Series L, Series M, Series N and Series O Non-Cumulative Perpetual Preferred Stock of $1,667.221, $390.264, $662.50, $343.75, $234.375, $250.00, $231.25 and $281.25, respectively.