v3.22.0.1
Segment and Related Information​ - Reconciliation of Segment Adjusted EBITDA to Consolidated Net Income (Loss) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Corporate expenses $ (33) $ (24) $ (53)  
Stock-based compensation expense (22) (23) (40)  
Metal price lag (16) (27) (39)  
Provision for depreciation and amortization (253) (251) (252)  
Goodwill and Intangible Asset Impairment (65) 0 0  
Restructuring and other charges (E) (624) (188) (87)  
Other (36) (55) (71)  
Operating (loss) income (292) 80 215  
Interest expense (100) (118) (115)  
Other (expenses) income, net (G) (67) (70) 15  
(Provision) Benefit for income taxes (I) 62 (1) 62  
Net income attributable to noncontrolling interest 0 0 0  
Consolidated net (loss) income attributable to Arconic Corporation (397) (109) 177  
Other expenses, net (60) (78) (2)  
Total benefit plan expense (excluding settlements and curtailments) (87) (103) (111)  
Assets 6,580 6,314    
Cash and cash equivalents 335 787    
Prepaid expenses and other current assets 55 53    
Corporate fixed assets, net 153 187    
Operating lease right-of-use assets 122 144   $ 150
Deferred income taxes 229 329    
Other noncurrent assets 88 97    
Other 35 21    
2020 Restructuring Programs        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Restructuring and other charges (E)   (188)    
Settlement of Certain Employee Retirement Benefits | 2020 Restructuring Programs        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Restructuring and other charges (E) (584) (199)    
Operating Segments        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Segment Adjusted EBITDA 757 648 757  
Provision for depreciation and amortization (237) (235) (232)  
Restructuring and other charges (E) (6) 24 (81)  
Segment Adjusted EBITDA and Unallocated amounts 27 26 85  
Assets 5,563 4,696    
Operating Segments | Rolled Products        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Segment Adjusted EBITDA 655 527 640  
Provision for depreciation and amortization (197) (192) (185)  
Restructuring and other charges (E) (1) 15 (47)  
Segment Adjusted EBITDA and Unallocated amounts 18 17 62  
Assets 4,766 3,895    
Operating Segments | Building and Construction Systems        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Segment Adjusted EBITDA 130 137 126  
Provision for depreciation and amortization (17) (18) (18)  
Restructuring and other charges (E) 2 (5) (33)  
Segment Adjusted EBITDA and Unallocated amounts 2 2 5  
Assets 416 381    
Operating Segments | Extrusions        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Segment Adjusted EBITDA (28) (16) (9)  
Provision for depreciation and amortization (23) (25) (29)  
Restructuring and other charges (E) (7) 14 (1)  
Segment Adjusted EBITDA and Unallocated amounts 7 7 18  
Assets 381 420    
Subtotal        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Segment Adjusted EBITDA and Unallocated amounts 0 1 24  
Corporate expenses        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Restructuring and other charges (E) (618) (212) (6)  
Segment Adjusted EBITDA and Unallocated amounts 0 0 15  
Other        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Segment Adjusted EBITDA and Unallocated amounts $ 0 $ (1) $ 9