Segment Information - Business Information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 1,007.3	$ 1,037.3	$ 1,062.9	$ 1,025.4	$ 891.7	$ 894.6	$ 803.5	$ 923.4	$ 4,132.9	$ 3,513.2	$ 3,789.9
Total EBITDA, for reportable segments									746.4	675.4	751.5
Unallocated corporate expense									476.6	396.3	472.4
Recognition of net actuarial (gains) losses	8.0	$ (3.9)	$ (3.5)		(21.6)	$ 11.9	$ (8.8)		(0.3)	(18.5)	4.1
Bargain purchase price gain									0.9	11.1	0.0
Depreciation and amortization									(167.8)	(167.1)	(160.6)
Interest expense									(58.8)	(67.6)	(72.1)
Interest income									2.3	3.7	4.9
Assets employed at year-end:
Total assets	5,170.7				5,041.6				5,170.7	5,041.6
Capital expenditures:
Payments to acquire property, plant, and equipment									148.3	121.6	140.6
Depreciation and amortization:
Depreciation and amortization									167.8	167.1	160.6
Mobile Industries
Segment Reporting Information [Line Items]
Net sales									1,965.7	1,671.6	1,893.9
Total EBITDA, for reportable segments									240.1	232.5	284.9
Depreciation and amortization									(80.1)	(79.7)	(73.6)
Assets employed at year-end:
Total assets	2,216.4				2,082.2				2,216.4	2,082.2
Capital expenditures:
Payments to acquire property, plant, and equipment									52.3	70.5	74.2
Depreciation and amortization:
Depreciation and amortization									80.1	79.7	73.6
Process Industries
Segment Reporting Information [Line Items]
Net sales									2,167.2	1,841.6	1,896.0
Total EBITDA, for reportable segments									506.3	442.9	466.6
Depreciation and amortization									(86.6)	(86.6)	(86.2)
Assets employed at year-end:
Total assets	2,548.3				2,482.6				2,548.3	2,482.6
Capital expenditures:
Payments to acquire property, plant, and equipment									95.4	50.1	65.3
Depreciation and amortization:
Depreciation and amortization									86.6	86.6	86.2
Corporate
Segment Reporting Information [Line Items]
Unallocated corporate expense									(46.1)	(40.7)	(55.4)
Depreciation and amortization									(1.1)	(0.8)	(0.8)
Assets employed at year-end:
Total assets	$ 406.0				$ 476.8				406.0	476.8
Capital expenditures:
Payments to acquire property, plant, and equipment									0.6	1.0	1.1
Depreciation and amortization:
Depreciation and amortization									$ 1.1	$ 0.8	$ 0.8