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Other Expense, Net - Summary of Impairment Charges and Loss on Sale Recorded for Certain Investments (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Impairments and loss on sale of equity-accounted investments [Line Items] |  |
Impairments and loss on sale of equity-accounted investments | $ 347 | $ 700
Power & Vision [Member] |  |
Impairments and loss on sale of equity-accounted investments [Line Items] |  |
Impairments and loss on sale of equity-accounted investments | 347 | 700
Tax effect on Other expense, net | (53) | (36)
Loss attributable to non-controlling interests | (75) | (127)
Non-cash impairment charge included in Net income attributable to Magna International Inc. | 219 | 537
Power & Vision [Member] | Getrag (Jiangxi) Transmission Co., Ltd [GJT] [Member] |  |
Impairments and loss on sale of equity-accounted investments [Line Items] |  |
Impairment of equity-accounted investment | 337 | 511
Power & Vision [Member] | Getrag Ford Transmission GmbH ["GFT"] [Member] |  |
Impairments and loss on sale of equity-accounted investments [Line Items] |  |
Impairment of equity-accounted investment |  | 150
Power & Vision [Member] | Dongfeng Getrag Transmission Co. Ltd ["DGT"] [Member] |  |
Impairments and loss on sale of equity-accounted investments [Line Items] |  |
Impairments and loss on sale of equity-accounted investments | $ 10 | $ 39

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- Definition Impairment losses on equity method investments after tax attributable to parent. + References No definition available. + Details
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- Definition Impairment losses on equity method investments attributable to non controlling interest. + References No definition available. + Details
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- Definition Impairment of equity-accounted investment. + References No definition available. + Details
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- Definition Impairments And Loss On Sale Of Equity Accounted Investments + References No definition available. + Details
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- Definition This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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