v3.22.2
Segment and Related Information​ - Operating Results (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales $ 2,548 $ 1,801 $ 4,739 $ 3,476
Segment Adjusted EBITDA 215 200 430 389
Provision for depreciation and amortization 62 62 122 125
Intersegment sales        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 11 10 24 17
Intersegment sales | Rolled Products        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 11 10 23 17
Intersegment sales | Building and Construction Systems        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 0 0 0 0
Intersegment sales | Extrusions        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 0 0 1 0
Operating segments        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 2,558 1,811 4,763 3,493
Segment Adjusted EBITDA 215 200 430 389
Provision for depreciation and amortization 60 59 116 117
Operating segments | Rolled Products        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 2,124 1,484 3,940 2,855
Segment Adjusted EBITDA 174 173 350 338
Provision for depreciation and amortization 49 49 97 97
Operating segments | Building and Construction Systems        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 329 257 620 493
Segment Adjusted EBITDA 53 35 97 63
Provision for depreciation and amortization 5 5 9 9
Operating segments | Extrusions        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 105 70 203 145
Segment Adjusted EBITDA 12 8 17 12
Provision for depreciation and amortization 6 5 10 11
Third-party sales | External Sales Including Reconciling Items        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 2,547 1,801 4,739 3,476
Third-party sales | External Sales Including Reconciling Items | Rolled Products        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 2,113 1,474 3,917 2,838
Third-party sales | External Sales Including Reconciling Items | Building and Construction Systems        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 329 257 620 493
Third-party sales | External Sales Including Reconciling Items | Extrusions        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales $ 105 $ 70 $ 202 $ 145