Accumulated Other Comprehensive Loss - Other Comprehensive Loss Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Proprietary Products	$ 580.2	$ 548.0	$ 527.2	$ 491.5	$ 470.6	$ 456.1	$ 469.7	$ 443.5	$ 2,146.9	$ 1,839.9	$ 1,717.4
Cost of goods and services sold									(1,379.1)	(1,234.2)	(1,172.0)
Interest expense									(8.2)	(8.5)	(8.4)
Income before income taxes									401.3	291.8	240.7
Income tax expense									(72.5)	(59.0)	(41.4)
Net income	$ 98.4	$ 82.3	$ 91.2	$ 74.3	$ 63.9	$ 56.3	$ 66.1	$ 55.4	346.2	241.7	$ 206.9
Reclassification out of Accumulated Other Comprehensive Loss
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Net income									1.6	3.8
Reclassification out of Accumulated Other Comprehensive Loss | Gains (losses) on derivatives
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Income before income taxes									5.4	8.4
Income tax expense									(1.5)	(2.6)
Net income									3.9	5.8
Reclassification out of Accumulated Other Comprehensive Loss | Amortization of Defined Benefit Pension and Other Postretirement Plans
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Prior service credit									0.6	0.6
Actuarial gains (losses)									(0.1)	0.2
Settlements									(3.7)	(3.5)
Income before income taxes									(3.2)	(2.7)
Income tax expense									0.9	0.7
Net income									(2.3)	(2.0)
Foreign currency contracts | Reclassification out of Accumulated Other Comprehensive Loss | Gains (losses) on derivatives
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Proprietary Products									(0.2)	1.0
Cost of goods and services sold									0.1	1.0
Other expense (income)									5.9	6.9
Forward treasury locks | Reclassification out of Accumulated Other Comprehensive Loss | Gains (losses) on derivatives
Reclassification out of Accumulated Other Comprehensive Loss [Line Items]
Interest expense									$ (0.4)	$ (0.5)