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Network
2410404 - Disclosure - Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail)
(http://www.ussteel.com/role/IncomeTaxesReconciliationOfUnrecognizedTaxBenefitsDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001163302 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Income Tax Disclosure [Abstract]
 
 
 
Reconciliation of unrecognized tax benefits [Roll Forward]:
 
 
 
Unrecognized tax benefits, beginning of year
74,000,000  
112,000,000  
127,000,000  
Increases – tax positions taken in prior years
0  
0  
0  
Decreases – tax positions taken in prior years
(4,000,000) 
(5,000,000) 
(7,000,000) 
Increases – current tax positions
3,000,000  
0  
1,000,000  
Settlements
0  
(26,000,000) 
0  
Lapse of statute of limitations
(1,000,000) 
(7,000,000) 
(9,000,000) 
Unrecognized tax benefits, end of year
72,000,000  
 
74,000,000  
 
112,000,000