Supplemental Balance Sheet Information (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Inventories
Raw materials and supplies	$ 238.3	$ 218.7
Work-in-process	69.4	67.2
Finished goods	155.7	134.1
Total inventories	463.4	420.0
Other current assets
Cost in excess of billings	52.3	50.1
Prepaid expenses	55.7	48.5
Prepaid income taxes	1.7	3.8
Other current assets	3.0	3.1
Total other current assets	112.7	105.5
Property, plant and equipment, net
Land and land improvements	35.5	35.9
Buildings and leasehold improvements	192.6	195.4
Machinery and equipment	600.2	589.7
Capitalized Computer Software, Gross	82.5	79.9
Construction in progress	51.4	47.8
Total property, plant and equipment	962.2	948.7
Accumulated depreciation and amortization	665.1	647.5
Total property, plant and equipment, net	297.1	301.2
Other non-current assets
Right-of-use lease assets	79.5	83.6
Prepaid income taxes	27.5	27.4
Deferred compensation plan assets	24.1	22.6
Other non-current assets	68.7	69.2
Total other non-current assets	199.8	202.8
Other current liabilities
Dividends payable	33.2	33.2
Accrued warranty	43.4	37.0
Accrued rebates and incentives	181.3	122.0
Billings in excess of cost	26.0	22.5
Current lease liability	24.1	22.1
Income taxes payable	16.7	14.6
Accrued restructuring	13.6	15.2
Other current liabilities	151.4	143.8
Total other current liabilities	489.7	410.4
Other non-current liabilities
Long-term lease liability	58.2	65.1
Income taxes payable	44.9	44.8
Self-insurance liabilities	43.4	42.0
Deferred compensation plan liabilities	24.1	22.6
Foreign currency contract liabilities	40.1	69.6
Other non-current liabilities	28.4	25.3
Total other non-current liabilities	$ 239.1	$ 269.4