Earnings Per Share - Components of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2022		Sep. 30, 2021		Sep. 30, 2022		Sep. 30, 2021
Earnings Per Share [Abstract]
Net income attributable to U.S. Bancorp	$ 1,812		$ 2,028		$ 4,900		$ 6,290
Preferred dividends	(85)	[1]	(84)	[2]	(228)	[3]	(232)	[4]
Impact of preferred stock call							(5)
Earnings allocated to participating stock awards	(9)		(10)		(24)		(30)
Net income applicable to U.S. Bancorp common shareholders	$ 1,718		$ 1,934		$ 4,648		$ 6,023
Average common shares outstanding	1,486		1,483		1,485		1,491
Net effect of the exercise and assumed purchase of stock awards			1		1		1
Average diluted common shares outstanding	1,486		1,484		1,486		1,492
Earnings per common share	$ 1.16		$ 1.3		$ 3.13		$ 4.04
Diluted earnings per common share	$ 1.16		$ 1.3		$ 3.13		$ 4.04

[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 $902.622, $223.611, $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 F, Series J, Series K, Series L and Series M Non-Cumulative Perpetual Preferred Stock of $894.444, $223.611, $406.25, $662.50, $343.75, $234.375 and $250.00, 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 $2,662.344, $663.542, $1,325.00, $1,031.25, $703.125, $750.00, $693.75 and $768.75 respectively.

[4] Reflects dividends declared per share on the Company’s Series A, Series B, Series F, Series I, Series J, Series K, Series L and Series M Non-Cumulative Perpetual Preferred Stock of $2,654.166, $663.542, $1,218.75, $232.953, $1,325.00, $1,031.25, $703.125 and $702.778, respectively.