Accumulated Other Comprehensive (Loss) Income - Reclassifications Out of Accumulated Other Comprehensive (Loss) Income (Detail) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of products sold										$ 3,525.7	$ 3,358.3	$ 3,188.8
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest										537.0	634.8	582.1
Tax (expense) benefit										147.0	159.5	169.7
Income (Loss) from Continuing Operations Net of Tax, Including Portion Attributable to Noncontrolling Interest		$ 85.3	$ 99.9	$ 129.7	$ 75.1	$ 128.0	$ 129.6	$ 140.3	$ 77.4	390.0	475.3	412.4
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax										(1.3)	4.4
Derivative Hedging Losses (Gains) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax										1.7	0.8	(3.5)
Derivative Hedging Losses (Gains) [Member] | Interest rate contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of products sold										0.1
Prior service cost [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]										5.1
Actuarial (losses) gains [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]									(3.8)	0.5
Defined benefit plan items [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax										(3.8)	5.6
Reclassification from AOCI, Current Period, Tax										0.8	(2.0)
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax										(3.0)	3.6	$ 7.3
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Derivative Hedging Losses (Gains) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest										2.1	0.9
Tax (expense) benefit										(0.4)	(0.1)
Income (Loss) from Continuing Operations Net of Tax, Including Portion Attributable to Noncontrolling Interest										1.7	0.8
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Derivative Hedging Losses (Gains) [Member] | Foreign exchange contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of products sold										2.2	0.4
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Derivative Hedging Losses (Gains) [Member] | Interest rate contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net										0.1
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Derivative Hedging Losses (Gains) [Member] | Commodity contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of products sold										$ (0.2)	$ 0.5

[1] These accumulated other comprehensive (loss) income components are included in the computation of net periodic benefit cost. Refer to Note 15, “Defined Benefit Plans,” for additional information.