Cover	Jun. 05, 2025
Document Information [Line Items]
Document Type	8-K
Amendment Flag	false
Document Period End Date	Jun. 05, 2025
Entity File Number	1-16811
Entity Registrant Name	United States Steel Corporation
Entity Central Index Key	0001163302
Entity Tax Identification Number	25-1897152
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	600 Grant Street
Entity Address, City or Town	Pittsburgh
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15219-2800
City Area Code	412
Local Phone Number	433-1121
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Entity Emerging Growth Company	false
New York Stock Exchange
Document Information [Line Items]
Title of 12(b) Security	Common Stock
Trading Symbol	X
Security Exchange Name	NYSE
Chicago Stock Exchange
Document Information [Line Items]
Title of 12(b) Security	Common Stock
Trading Symbol	X
Security Exchange Name	CHX

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For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

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Address Line 1 such as Attn, Building Name, Street Name

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Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

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Local phone number for entity.

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

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Trading symbol of an instrument as listed on an exchange.

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

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