Discontinued Operations - Classes of Assets and Liabilities (Details) - Fairbanks Morse - Discontinued Operations, Disposed of by Sale $ in Millions	Dec. 31, 2019 USD ($)
Assets:
Accounts receivable	$ 107.8
Inventories	60.2
Property, plant, and equipment	63.0
Goodwill	11.8
Other assets	11.3
Total assets of discontinued operations	254.1
Liabilities:
Accounts payable	36.9
Accrued expenses	48.2
Other liabilities	4.4
Total liabilities of discontinued operations	$ 89.5