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Related Party Transactions (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Related Party Transaction [Line Items] |  |  |
Other (loss) income, net | $ (24,000,000) | $ (18,000,000) |
Mr. Icahn and affiliates |  |  |
Related Party Transaction [Line Items] |  |  |
Percentage of assets under management | 54.00% |  | 54.00%
Noncontrolling Interest in Variable Interest Entity | $ 5,500,000,000 |  | $ 5,000,000,000.0
Expense sharing arrangement | Consolidated VIE |  |  |
Related Party Transaction [Line Items] |  |  |
Amount of transaction with related party | 3,000,000 | 5,000,000 |
Automotive Segment |  |  |
Related Party Transaction [Line Items] |  |  |
Other (loss) income, net | 2,000,000 | (1,000,000) |
Automotive Segment | 767 Leasing |  |  |
Related Party Transaction [Line Items] |  |  |
Contribution to non-consolidated VIE | 0 | 11,000,000 |
Investment Segment |  |  |
Related Party Transaction [Line Items] |  |  |
Other (loss) income, net | (17,000,000) | (21,000,000) |
Brett Icahn |  |  |
Related Party Transaction [Line Items] |  |  |
Amount contributed in accordance with manager agreement |  | $ 40,000,000 |
Investment funds total fair value | $ 86,000,000 |  | $ 93,000,000

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