v3.23.2
Segment and Related Information​ - Operating Results (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales $ 1,990 $ 2,548 $ 3,919 $ 4,739
Provision for depreciation and amortization 52 62 105 122
Rolled Products | Disposed of by sale | Samara Manufacturing Site        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Segment Adjusted EBITDA   24   42
External Sales Including Reconciling Items        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 1,973 2,547 3,905 4,739
External Sales Including Reconciling Items | Rolled Products        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 1,529 2,113 3,033 3,917
External Sales Including Reconciling Items | Rolled Products | Disposed of by sale | Samara Manufacturing Site        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales   314   547
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 319 329 627 620
External Sales Including Reconciling Items | Extrusions        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 125 105 245 202
Intersegment sales        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 13 11 24 24
Intersegment sales | Rolled Products        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 8 11 19 23
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 5 0 5 1
Operating segments        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 1,986 2,558 3,929 4,763
Segment Adjusted EBITDA 210 215 377 430
Provision for depreciation and amortization 50 60 99 116
Operating segments | Rolled Products        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 1,537 2,124 3,052 3,940
Segment Adjusted EBITDA 158 174 275 350
Provision for depreciation and amortization 42 49 84 97
Operating segments | Rolled Products | Disposed of by sale | Samara Manufacturing Site        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Segment Adjusted EBITDA   24   42
Operating segments | Building and Construction Systems        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 319 329 627 620
Segment Adjusted EBITDA 53 53 107 97
Provision for depreciation and amortization 4 5 8 9
Operating segments | Extrusions        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Total sales 130 105 250 203
Segment Adjusted EBITDA 1 12 5 17
Provision for depreciation and amortization $ 4 $ 6 $ 7 $ 10