Earnings Per Share - Components of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023		Mar. 31, 2022
Earnings Per Share [Abstract]
Net income attributable to U.S. Bancorp	$ 1,698		$ 1,557
Preferred dividends	(98)	[1]	(84)	[2]
Earnings allocated to participating stock awards	(8)		(7)
Net income applicable to U.S. Bancorp common shareholders	$ 1,592		$ 1,466
Average common shares outstanding	1,532		1,485
Net effect of the exercise and assumed purchase of stock awards			1
Average diluted common shares outstanding	1,532		1,486
Earnings per common share	$ 1.04		$ 0.99
Diluted earnings per common share	$ 1.04		$ 0.99

[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 $1,462.428, $339.357, $662.50, $343.750, $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 $875.00, $218.75, $662.50, $343.75, $234.375, $250.00, $231.25 and $206.25 respectively.