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Discontinued Operations - Narrative (Details) - Discontinued Operations - Disposed of by Sale - NATG - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 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   $ 0.4  
Benefit related to resolution of certain liabilities   $ 1.8   $ 2.3
Operating expense   0.4   0.4
Tax effect of discontinued operation   $ 0.5   3.4
Restitution receipts       15.0
Professional fees related to ongoing restitution proceedings       3.0
Vendor settlements       $ 0.1
Maximum        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Additional charges (less than) $ 0.5   $ 0.5