Discontinued Operations - Narrative (Details) - Discontinued Operations - Disposed of by Sale - NATG - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operations, liability resolution benefit	$ 0.2
Restitution receipts		$ 15.0
Ongoing restitution proceedings		3.0
Vendor settlements		0.1
Benefit from settlements of payable accounts		0.5
Tax effect of discontinued operation		$ 2.9
Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Additional charges (less than)	$ 0.5

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Disposal Group, Including Discontinued Operation, Restitution Receipts

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Disposal Group, Including Discontinued Operation, Vendor Settlements

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Disposal Group, Including Discontinued Operations, Liability Resolution Benefit

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Professional Costs Related To Ongoing Restitution Proceedings

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Special Charges, Expected Future Charges

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Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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