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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Total reclassifications for the period	$ (0.3)	$ (1.2)	$ (0.7)	$ (2.3)
Other income (expense), net	(3.9)	(1.1)	(3.2)	10.9
Interest expense, net	43.2	44.5	88.1	86.5
Total pre-tax amount	(37.8)	(116.8)	(132.5)	(230.3)
Tax (expense) benefit	12.3	33.5	42.7	355.0
Net earnings (loss) from continuing operations	25.5	83.3	89.8	(124.7)
Prior service credit | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Loss [Line Items]
Total pre-tax amount	0.0	0.1	0.1	0.2
Actuarial losses | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Loss [Line Items]
Total pre-tax amount	(1.2)	(0.7)	(2.4)	(1.6)
Defined benefit pension plans and other post-employment benefits
Accumulated Other Comprehensive Income Loss [Line Items]
Total reclassifications for the period			(1.7)	(1.0)
Defined benefit pension plans and other post-employment benefits | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Loss [Line Items]
Total pre-tax amount	(1.2)	(0.6)	(2.3)	(1.4)
Tax benefit	0.3	0.2	0.6	0.4
Total reclassifications for the period	(0.9)	(0.4)	(1.7)	(1.0)
Net gains (losses) on cash flow hedging derivatives
Accumulated Other Comprehensive Income Loss [Line Items]
Total pre-tax amount	1.0	(1.1)	1.6	(1.7)
Tax (expense) benefit	(0.4)	0.3	(0.6)	0.4
Net earnings (loss) from continuing operations	(0.6)	0.8	(1.0)	1.3
Net gains (losses) on cash flow hedging derivatives | Foreign currency forward contracts
Accumulated Other Comprehensive Income Loss [Line Items]
Other income (expense), net	0.9	(1.2)	1.5	(1.8)
Net gains (losses) on cash flow hedging derivatives | Treasury locks
Accumulated Other Comprehensive Income Loss [Line Items]
Interest expense, net	$ 0.1	$ 0.1	$ 0.1	$ 0.1