Accumulated Other Comprehensive Loss - Detail of Amount Reclassified from Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Cost of sales	$ 761.3	$ 782.7	$ 1,544.7	$ 1,530.2
Other income, net	3.4	3.9	9.1	3.2
Total pre-tax amount	(144.9)	(37.8)	(292.1)	(132.5)
Tax benefit (expense)	44.6	12.3	77.3	42.7
Net earnings from continuing operations	(100.3)	(25.5)	(214.8)	(89.8)
Total reclassifications for the period	0.5	(0.3)	0.2	(0.7)
Defined benefit pension plans and other post-employment benefits
Accumulated Other Comprehensive Income Loss [Line Items]
Total reclassifications for the period			(2.2)	(1.7)
Reclassification out of Accumulated Other Comprehensive Income | Prior service credit
Accumulated Other Comprehensive Income Loss [Line Items]
Other income, net	0.0	0.0	0.1	0.1
Reclassification out of Accumulated Other Comprehensive Income | Actuarial losses
Accumulated Other Comprehensive Income Loss [Line Items]
Other income, net	(1.4)	(1.2)	(3.0)	(2.4)
Reclassification out of Accumulated Other Comprehensive Income | Defined benefit pension plans and other post-employment benefits
Accumulated Other Comprehensive Income Loss [Line Items]
Total pre-tax amount	(1.4)	(1.2)	(2.9)	(2.3)
Tax benefit (expense)	0.3	0.3	0.7	0.6
Net earnings from continuing operations	(1.1)	(0.9)	(2.2)	(1.7)
Reclassification out of Accumulated Other Comprehensive Income | Net gains (losses) on cash flow hedging derivatives
Accumulated Other Comprehensive Income Loss [Line Items]
Total pre-tax amount	2.1	1.0	3.2	1.6
Tax benefit (expense)	(0.5)	(0.4)	(0.8)	(0.6)
Net earnings from continuing operations	1.6	0.6	2.4	1.0
Reclassification out of Accumulated Other Comprehensive Income | Net gains (losses) on cash flow hedging derivatives | Foreign currency forward and option contracts
Accumulated Other Comprehensive Income Loss [Line Items]
Cost of sales	2.0	0.9	3.1	1.5
Reclassification out of Accumulated Other Comprehensive Income | Net gains (losses) on cash flow hedging derivatives | Treasury Lock
Accumulated Other Comprehensive Income Loss [Line Items]
Interest expense, net	$ 0.1	$ 0.1	$ 0.1	$ 0.1