Discontinued Operations - Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Total current assets	$ 28.0	$ 337.4
Total non-current assets	0.0	1,862.8
Current liabilities:
Total current liabilities	27.2	212.9
Total non-current liabilities	0.0	192.8
Discontinued Operations, Disposed of by Sale | High Pressure Solutions
Current assets:
Cash and cash equivalents	2.3	0.0
Accounts receivable, net	4.4	104.8
Inventories	19.5	226.9
Other current assets	0.0	5.7
Total current assets	26.2	337.4
Property, plant and equipment, net	1.3	188.3
Goodwill	0.5	721.0
Other intangible assets, net	0.0	935.4
Deferred tax assets	0.0	0.5
Other assets	0.0	17.6
Total non-current assets	1.8	1,862.8
Total assets	28.0	2,200.2
Current liabilities:
Accounts payable	26.5	134.7
Accrued liabilities	0.7	78.2
Total current liabilities	27.2	212.9
Pensions and other postretirement benefits	0.0	2.5
Deferred income taxes	0.0	173.3
Other liabilities	0.0	17.0
Total non-current liabilities	0.0	192.8
Total liabilities	$ 27.2	405.7
Discontinued Operations, Disposed of by Sale | Specialty Vehicle Technologies
Current assets:
Total assets		1,512.7
Current liabilities:
Total liabilities		$ 354.1