Supplemental Balance Sheet Information (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Inventories
Raw materials and supplies	$ 218.7	$ 196.2
Work-in-process	67.2	65.2
Finished goods	134.1	116.0
Total inventories	420.0	377.4
Other current assets
Cost in excess of billings	50.1	41.0
Prepaid expenses	48.5	48.3
Deferred income taxes	3.8	5.2
Other current assets	3.1	4.6
Total other current assets	105.5	99.1
Property, plant and equipment, net
Land and land improvements	35.9	33.7
Buildings and leasehold improvements	195.4	188.1
Machinery and equipment	589.7	537.2
Capitalized Computer Software, Gross	79.9	73.5
Construction in progress	47.8	48.1
Total property, plant and equipment	948.7	880.6
Accumulated depreciation and amortization	647.5	597.4
Total property, plant and equipment, net	301.2	283.2
Other non-current assets
Right-of-use lease assets	83.6	77.2
prepaid taxes long term	27.4	29.6
Deferred compensation plan assets	22.6	21.3
Other non-current assets	69.2	68.8
Total other non-current assets	202.8	196.9
Other current liabilities
Dividends payable	33.2	32.0
Accrued warranty	37.0	32.1
Accrued Exchange Fee Rebate	122.0	83.5
Billings in excess of cost	22.5	22.5
Current lease liability	22.1	19.0
Income taxes payable	14.6	11.1
Accrued restructuring	15.2	16.2	$ 27.1
Other current liabilities	143.8	136.5
Total other current liabilities	$ 410.4	$ 352.9
Operating lease liability, current, statement of financial position	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent
Other non-current liabilities
Long-term lease liability	$ 65.1	$ 61.1
Taxes payable	44.8	45.4
Self-insurance liabilities	42.0	41.6
Deferred compensation plan liabilities	22.6	21.3
Foreign currency contract liabilities	69.6	11.6
Other non-current liabilities	25.3	25.7
Total other non-current liabilities	$ 269.4	$ 206.7
Operating lease liability, noncurrent, statement of financial position	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent