v3.22.1
Segment and Related Information​ - Segment Operating Profit (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Segment Adjusted EBITDA $ 215 $ 189
Corporate expenses(1) (9) (9)
Stock-based compensation expense (5) (2)
Metal Price Lag (36) 5
Unrealized Gain (Loss) on Derivatives 2 0
Provision for depreciation and amortization (60) (63)
Restructuring, Settlement And Impairment Provisions, Including Gain (Loss) On Disposition Of Assets And Business (5) (1)
Other (6) (6)
Operating income 96 113
Interest expense (25) (23)
Other expenses, net (17) (22)
Provision for income taxes (12) (16)
Net Income (Loss) Attributable to Noncontrolling Interest 0 0
Net Income (Loss) Attributable to Parent 42 52
Operating segments    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Segment Adjusted EBITDA 215 189
Provision for depreciation and amortization (56) (58)
Restructuring, Settlement And Impairment Provisions, Including Gain (Loss) On Disposition Of Assets And Business (1) (1)
Operating segments | Rolled Products    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Segment Adjusted EBITDA 176 165
Provision for depreciation and amortization (48) (48)
Restructuring, Settlement And Impairment Provisions, Including Gain (Loss) On Disposition Of Assets And Business 0 (1)
Operating segments | Building and Construction Systems    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Segment Adjusted EBITDA 44 28
Provision for depreciation and amortization (4) (4)
Restructuring, Settlement And Impairment Provisions, Including Gain (Loss) On Disposition Of Assets And Business 0 1
Operating segments | Extrusions    
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]    
Segment Adjusted EBITDA 5 4
Provision for depreciation and amortization (4) (6)
Restructuring, Settlement And Impairment Provisions, Including Gain (Loss) On Disposition Of Assets And Business $ (1) $ 1