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Acquisitions, Discontinued Operations, and the Asbestos Portfolio Sale - Wind-Down of DBT - Assets and Liabilities of Discontinued Operations (Details) - Discontinued operations, disposed of by sale - DBT - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
ASSETS    
Cash and equivalents $ 9.3 $ 7.8
Accounts receivable, net 7.6 9.1
Other current assets 6.5 7.0
Property, plant and equipment:    
Property, plant and equipment, gross 0.9 1.7
Accumulated depreciation (0.8) (1.5)
Property, plant and equipment, net 0.1 0.2
Other assets 19.1 27.6
Total assets 42.6 51.7
LIABILITIES    
Accounts payable 1.4 2.3
Contract liabilities 3.6 5.6
Accrued expenses 22.0 22.4
Other long-term liabilities 4.6 4.9
Total liabilities 31.6 35.2
Buildings and leasehold improvements    
Property, plant and equipment:    
Property, plant and equipment, gross 0.2 0.2
Machinery and equipment    
Property, plant and equipment:    
Property, plant and equipment, gross $ 0.7 $ 1.5