Accumulated Other Comprehensive Loss - Detail of Amount Reclassified from Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Total reclassifications for the period	$ (0.4)	$ (1.1)
Other income (expense), net	0.7	12.0
Total pre-tax amount	(94.7)	(113.5)
Tax benefit	30.4	321.5
Net earnings from continuing operations	(64.3)	208.0
Defined benefit pension plans and other post-employment benefits
Accumulated Other Comprehensive Income Loss [Line Items]
Total reclassifications for the period	(0.8)	(0.6)
Total reclassifications for the period
Accumulated Other Comprehensive Income Loss [Line Items]
Total reclassifications for the period	(0.4)	(1.1)
Total reclassifications for the period | Prior service costs
Accumulated Other Comprehensive Income Loss [Line Items]
Total pre-tax amount	0.1	0.1
Total reclassifications for the period | Actuarial losses
Accumulated Other Comprehensive Income Loss [Line Items]
Total pre-tax amount	(1.2)	(0.9)
Total reclassifications for the period | Defined benefit pension plans and other post-employment benefits
Accumulated Other Comprehensive Income Loss [Line Items]
Total pre-tax amount	(1.1)	(0.8)
Tax benefit	0.3	0.2
Total reclassifications for the period	(0.8)	(0.6)
Total reclassifications for the period | Net gains (losses) on cash flow hedging derivatives
Accumulated Other Comprehensive Income Loss [Line Items]
Total pre-tax amount	0.6	(0.6)
Tax benefit	(0.2)	0.1
Net earnings from continuing operations	0.4	(0.5)
Total reclassifications for the period | Net gains (losses) on cash flow hedging derivatives | Foreign currency forward contracts
Accumulated Other Comprehensive Income Loss [Line Items]
Other income (expense), net	$ 0.6	$ (0.6)