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Related Party Transactions (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Related Party Transaction [Line Items] |  |  |
Other income (loss), net | $ 19 | $ 0 | $ (22)
Equity earnings from non-consolidated affiliates |  |  |
Related Party Transaction [Line Items] |  |  |
Other income (loss), net | 21 | 7 | 1
Investment in funds | Mr. Icahn and affiliates |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of transaction with related party | $ 220 | $ 310 | 600
Percentage fair value of investments in Funds that is attributable to Mr. Icahn | 51.00% | 50.00% |
Noncontrolling Interest in Variable Interest Entity | $ 4,500 | $ 5,000 |
Expense sharing arrangement | Consolidated VIE |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of transaction with related party | 23 | 12 | 13
Repair services revenue from related party | Hertz |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of transaction with related party | 54 | 40 | 17
Purchases from related party | Hertz |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of transaction with related party |  | 1 | 2
Purchases from related party | ACF |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of transaction with related party |  | 3 | 6
Sales to related party | ACF |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of transaction with related party |  | 6 | 1
Buying group operating expenses | Insight Portfolio Group LLC |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of transaction with related party | 3 | 4 | 2
Automotive Segment |  |  |
Related Party Transaction [Line Items] |  |  |
Other income (loss), net | 15 | (1) | 0
Automotive Segment | 767 Leasing |  |  |
Related Party Transaction [Line Items] |  |  |
Variable Interest Entity, Nonconsolidated, assets at VIE | 121 | 59 |
Variable Interest Entity, Nonconsolidated, liabilities at VIE | 1 | 1 |
Contribution to non-consolidated VIE | 50 | 60 |
Equity investment in non-consolidated VIE | 120 | 59 |
Automotive Segment | 767 Leasing | Equity earnings from non-consolidated affiliates |  |  |
Related Party Transaction [Line Items] |  |  |
Other income (loss), net | 11 | (1) |
Investment Segment |  |  |
Related Party Transaction [Line Items] |  |  |
Other income (loss), net | $ (5) | (2) | $ (50)
Investment Segment | Purchases from related party | Hertz |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of transaction with related party |  | $ 36 |

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