Discontinued Operations - Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Total current assets	$ 73.7	$ 337.4
Total non-current assets	0.0	1,862.8
Current liabilities:
Total current liabilities	67.9	212.9
Total non-current liabilities	0.0	192.8
Discontinued Operations, Disposed of by Sale | Specialty Vehicle Technologies
Current assets:
Total assets		1,512.7
Current liabilities:
Total liabilities		354.1
Discontinued Operations, Disposed of by Sale | High Pressure Solutions
Current assets:
Accounts receivable, net	18.7	104.8
Inventories	19.6	226.9
Other current assets	4.5	5.7
Total current assets	42.8	337.4
Property, plant and equipment, net	2.1	188.3
Goodwill	0.8	721.0
Other intangible assets, net	28.0	935.4
Deferred tax assets	0.0	0.5
Other assets	0.0	17.6
Total non-current assets	30.9	1,862.8
Total assets	73.7	2,200.2
Current liabilities:
Accounts payable	32.3	134.7
Accrued liabilities	31.8	78.2
Total current liabilities	64.1	212.9
Pensions and other postretirement benefits	0.0	2.5
Deferred income taxes	3.8	173.3
Other liabilities	0.0	17.0
Total non-current liabilities	3.8	192.8
Total liabilities	$ 67.9	$ 405.7