Financial Instrument, Risk Management and Fair Value Measurements - Derivatives Gain (Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning		$ 11.2	$ 5.2	$ 7.1
Reclassification of deferred hedging (gains) losses, net of tax	[1]	(8.2)	(7.7)	(0.7)
Total derivative instruments, net of tax of $(19.7), $(0.5) and $0.4		(77.2)	6.0	(1.9)
Accumulated other comprehensive income (loss), net of tax, ending		(66.0)	11.2	5.2
Foreign currency contracts
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning		10.4	4.4	4.6
Accumulated other comprehensive income (loss), net of tax, ending		(1.4)	10.4	4.4
Energy contracts
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning		0.0	0.0	1.4
Accumulated other comprehensive income (loss), net of tax, ending		0.0	0.0	0.0
Interest rate contracts
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated other comprehensive income (loss), net of tax, beginning		0.8	0.8	1.1
Accumulated other comprehensive income (loss), net of tax, ending		(64.6)	0.8	0.8
Designated as Cash Flow Hedges
Accumulated Other Comprehensive Income [Roll Forward]
Unrealized hedging gains (losses) and other, net of tax			13.7	(1.2)
Reclassification of deferred hedging (gains) losses, net of tax			(7.7)	(0.7)
Total derivative instruments, net of tax of $(19.7), $(0.5) and $0.4			6.0	(1.9)
Unrealized hedging gains (losses) and other, net of tax		(69.0)
Reclassification of deferred hedging (gains) losses, net of tax		(8.2)
Total derivative instrument impact on comprehensive income, net of tax		(77.2)
Designated as Cash Flow Hedges | Foreign currency contracts
Accumulated Other Comprehensive Income [Roll Forward]
Unrealized hedging gains (losses) and other, net of tax			14.2	(0.4)
Reclassification of deferred hedging (gains) losses, net of tax			(8.2)	0.2
Total derivative instruments, net of tax of $(19.7), $(0.5) and $0.4			6.0	(0.2)
Unrealized hedging gains (losses) and other, net of tax		(3.1)
Reclassification of deferred hedging (gains) losses, net of tax		(8.7)
Total derivative instrument impact on comprehensive income, net of tax		(11.8)
Designated as Cash Flow Hedges | Energy contracts
Accumulated Other Comprehensive Income [Roll Forward]
Unrealized hedging gains (losses) and other, net of tax			0.0	(0.8)
Reclassification of deferred hedging (gains) losses, net of tax			0.0	(0.6)
Total derivative instruments, net of tax of $(19.7), $(0.5) and $0.4			0.0	(1.4)
Unrealized hedging gains (losses) and other, net of tax		0.0
Reclassification of deferred hedging (gains) losses, net of tax		0.0
Total derivative instrument impact on comprehensive income, net of tax		0.0
Designated as Cash Flow Hedges | Interest rate contracts
Accumulated Other Comprehensive Income [Roll Forward]
Unrealized hedging gains (losses) and other, net of tax			(0.5)	0.0
Reclassification of deferred hedging (gains) losses, net of tax			0.5	(0.3)
Total derivative instruments, net of tax of $(19.7), $(0.5) and $0.4			0.0	(0.3)
Unrealized hedging gains (losses) and other, net of tax		(65.9)
Reclassification of deferred hedging (gains) losses, net of tax		0.5
Total derivative instrument impact on comprehensive income, net of tax		(65.4)
Derivatives Not Designated as Hedging Instruments
Accumulated Other Comprehensive Income [Roll Forward]
Amount of pre-tax gain or (loss) recognized in income on derivatives		(26.7)	(10.9)	(12.5)
Derivatives Not Designated as Hedging Instruments | Foreign currency contracts | Cost of Sales and Services
Accumulated Other Comprehensive Income [Roll Forward]
Amount of pre-tax gain or (loss) recognized in income on derivatives		$ (26.7)	$ (10.9)	$ (12.5)

[1] For more detail on the components of these reclassifications and the affected line item in the consolidated statements of income (loss) see Note 17 within these consolidated financial statements.