Recently Adopted Accounting Standards (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Changes and Error Corrections [Abstract]

ASUs Adopted that did not have a Material Impact

U. S. Steel's adoption of the following ASU's did not have a material impact on U. S. Steel's financial position, results of operations or cash flows:

Effective Date	ASU	Description
January 1, 2019	2018-07	Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting
January 1, 2019	2018-15	Intangibles - Goodwill and Other - Internal Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs in a Cloud Computing Arrangement That is a Service Contract