Earnings Per Share - Components of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023		Jun. 30, 2022		Jun. 30, 2023		Jun. 30, 2022
Earnings Per Share [Abstract]
Net income attributable to U.S. Bancorp	$ 1,361		$ 1,531		$ 3,059		$ 3,088
Preferred dividends	(73)	[1]	(59)	[2]	(171)	[3]	(143)	[4]
Earnings allocated to participating stock awards	(7)		(8)		(15)		(15)
Net income applicable to U.S. Bancorp common shareholders	$ 1,281		$ 1,464		$ 2,873		$ 2,930
Average common shares outstanding	1,533		1,486		1,532		1,485
Net effect of the exercise and assumed purchase of stock awards			1		1		1
Average diluted common shares outstanding	1,533		1,487		1,533		1,486
Earnings per common share	$ 0.84		$ 0.99		$ 1.87		$ 1.97
Diluted earnings per common share	$ 0.84		$ 0.99		$ 1.87		$ 1.97

[1] Reflects dividends declared per share on the Company’s Series A, Series B, Series K, Series L, Series M, Series N and Series O Non-Cumulative Perpetual Preferred Stock of $1,587.52, $370.338, $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 K, Series L, Series M, Series N and Series O Non-Cumulative Perpetual Preferred Stock of $884.722, $221.181, $343.75, $234.375, $250.00, $231.25 and $281.25, respectively.

[3] 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 $3,049.948, $709.695, $662.50, $687.50, $468.75, $500.00, $462.50 and $562.50, respectively.

[4] 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 $1,759.722, $439.931, $662.50, $687.50, $468.75, $500.00, $462.50 and $487.50, respectively.