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v3.20.4

Restructuring And Other Initiatives (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Restructuring Reserve [Roll Forward] |  |  |
Balance at beginning of period | $ 564 | $ 1,122 | $ 227
Additions, interest accretion and other | 565 | 629 | 1,637
Payments | (678) | (1,101) | (600)
Revisions to estimates and effect of foreign currency | (99) | (86) | (142)
Balance at end of period | 352 | 564 | 1,122
Change in valuation allowances | 370 | (233) | 1,695
GMI | Australia, New Zealand, Thailand and India |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Restructuring charges and other charges | 683 |  |
GMI | Thailand |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Proceeds from sale of business | 143 |  |
GMI | Australia and New Zealand |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Change in valuation allowances | 236 |  |
Unallocation of Products to Certain Manufacturing Facilities And Other Employee Separation Programs |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Payments | (333) | (1,100) |
Restructuring cost incurred to date |  | 3,100 |
Unallocation of Products to Certain Manufacturing Facilities And Other Employee Separation Programs | GMNA |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Restructuring charges and other charges |  | 1,800 | 1,300
Dealer Restructurings, Employee Separations and Supplier Claim Charges | GMI | Australia, New Zealand, Thailand and India |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Restructuring charges and other charges | 360 |  |
Asset Impairments, Sales Allowances, Inventory Provisions and Other Charges | GMI | Australia, New Zealand, Thailand and India |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Restructuring charges and other charges | 323 |  |
Dealer Restructuring and Employee Separation Payments | GMI | Australia, New Zealand, Thailand and India |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Payments | $ (197) |  |
Employee Severance | GMNA |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Restructuring charges and other charges |  |  | 1,000
Non-cash Accelerated Depreciation | GMNA |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Restructuring charges and other charges |  | 1,300 | 301
Supplier Related Charges and Employee Separation Charges | GMNA |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Restructuring charges and other charges |  | $ 535 |
Facility closing | GMI | Gunsan Korea Plant |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Restructuring charges and other charges |  |  | 1,000
Severance Costs |  |  | 495
Non-cash Asset Impairments and Other Charges | GMI | Gunsan Korea Plant |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Restructuring charges and other charges |  |  | 537
Employee Severance and Statutory Pension Payments | GMI | Gunsan Korea Plant |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Payments |  |  | $ (775)

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