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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022
Operating Loss Carryforwards [Line Items] |  |
Valuation allowance | $ 71.3 | $ 51.4
Deferred tax assets | 33.7 | 0.0
Capital gains | 4.0 |
Income taxes payable | 28.9 |
Income taxes receivable |  | $ 33.6
Deferred tax assets, remaining capital loss carryforwards | 29.7 |
Canada |  |
Operating Loss Carryforwards [Line Items] |  |
Undistributed earnings | 71.1 |
Tax that would be payable upon remittance of undistributed earnings | 3.6 |
State and Local Jurisdiction |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards | 41.6 |
Investment in Shift Technologies Inc. |  |
Operating Loss Carryforwards [Line Items] |  |
Valuation allowance | 29.7 |
Change in valuation allowance | (4.3) |
State Net Operating Losses |  |
Operating Loss Carryforwards [Line Items] |  |
Valuation allowance | 41.6 |
Change in valuation allowance | 24.2 |
Capital Loss Carryforward |  |
Operating Loss Carryforwards [Line Items] |  |
Valuation allowance | $ 29.7 |

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- Definition Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due. This amount is the total of current and noncurrent accrued income taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(15)(b)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(15)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15 + Details
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