Accumulated Other Comprehensive Loss Reclassification Adjustment (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest expense		$ (195.3)	$ (292.7)	$ (202.9)
Net actuarial gains (losses) recognized due to settlement (net of tax of $(0.4) and $0.3, respectively)		0.7	(0.8)	1.0
Currency impact		0.6	(1.8)	(0.4)
Total reclassifications for the period		73.2	12.4
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax		(3.4)	5.9	(0.7)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax		0.0	(0.2)	(0.1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax		23.2	1.5	(0.6)
Other Comprehensive Income (Loss), Defined Benefit Plan, Adjustment for Settlement or Curtailment Gain (Loss), Tax		0.4	(0.3)	(0.1)
Other Comprehensive (Income) Loss, Currency Impact, Tax		0.4	(0.5)	$ 0.0
Interest Rate Hedges
Total reclassifications for the period		(2.1)	5.0
Interest Rate Hedges | Reclassification out of Accumulated Other Comprehensive Income [Member]
Interest expense		(2.1)	5.0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax		(0.8)	1.8
Pension and Other Post-Retirement Benefits
Total reclassifications for the period		75.3	7.4
Pension and Other Post-Retirement Benefits | Reclassification out of Accumulated Other Comprehensive Income [Member]
Amortization of prior service cost		0.0	0.5
Net actuarial gains recognized during the year (net of tax of $23.2 and $1.5, respectively)	[1]	76.0	6.1
Net actuarial gains (losses) recognized due to settlement (net of tax of $(0.4) and $0.3, respectively)	[1]	(0.7)	0.8
Amounts reclassified from AOCI		75.3	7.4
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax		0.0	(0.2)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax		(23.4)	(1.5)
Other Comprehensive Income (Loss), Defined Benefit Plan, Adjustment for Settlement or Curtailment Gain (Loss), Tax		(0.4)	0.3
Other Comprehensive (Income) Loss, Currency Impact, Tax		$ 0.0	$ 0.0

[1] Pension and other post-retirement benefits AOCI components are included in the computation of net periodic benefit cost (refer to Note 15: Benefit Plans).