CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net earnings (loss)		$ 4,174	$ (1,165)	$ (630)
Other comprehensive income (loss), net of tax:
Changes in foreign currency translation adjustments (a)	[1]	(78)	68	(22)
Changes in pension and other employee benefit accounts (a)	[1]	433	385	573
Changes in derivative financial instruments (a)	[1]	23	(22)	(3)
Total other comprehensive income (loss), net of tax		378	431	548
Comprehensive income (loss) including noncontrolling interest		4,552	(734)	(82)
Comprehensive income (loss) attributable to noncontrolling interest		0	0	0
Comprehensive income (loss) attributable to United States Steel Corporation		$ 4,552	$ (734)	$ (82)

[1] Related income tax (provision) benefit Foreign currency translation adjustments$32 $(16)$6 Pension and other benefits adjustments(147)(123)(191)Derivative adjustments(6)4 1