Retirement Benefits - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) employee shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Settlement loss recognized			$ 0.9
Net periodic benefit cost			1.0
Actuarial loss (gain)	$ 9.7
Deferred pension cost (reversal of cost)	10.7
Plan assets, period increase (decrease)	1.0
Funded status	10.2
Accumulated benefit obligation for all defined benefit pension plans	$ 81.9	$ 110.7
Percentage of excess gains and losses over benefit obligation or market value of assets amortized	10.00%
Costs of defined contribution plans	$ 16.1	12.8	12.5
Number of participants covering under multi employer pension plan | employee	216
Costs of bargaining unit-sponsored multi-employer plans and defined contribution plans	$ 0.8	1.0	1.1
Weighted average annual rate of increase in the per capita cost of covered health care benefits assumed	5.59%
Assumed decrease of weighted average health care cost trend rate	4.00%
Year that reaches assumed decrease of weighted average health care cost trend rate	2040
Stock held in plan assets (in shares) | shares	0
Defined Contribution Plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, expected contribution for next fiscal year	$ 16.2
401k
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, expected contribution for next fiscal year	$ 12.1
U.S. | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation of fund assets in equities	10.00%
U.S. | Fixed Income Securities | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target allocation of fund assets in equities	90.00%
UK | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation of fund assets in equities	62.00%
UK | Equity Securities | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target allocation of fund assets in equities	57.00%
UK | Equity Securities | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target allocation of fund assets in equities	67.00%
UK | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation of fund assets in equities	38.00%
UK | Fixed Income Securities | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target allocation of fund assets in equities	33.00%
UK | Fixed Income Securities | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target allocation of fund assets in equities	43.00%
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contribution for next fiscal year	$ 3.9
Pension Benefits | U.S.
Defined Benefit Plan Disclosure [Line Items]
Settlement loss recognized	0.0	10.5	0.9
Net periodic benefit cost	(0.4)	(10.4)	0.3
Actuarial loss (gain)	2.0	1.9
Funded status	(3.6)	6.4
Pension Benefits | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Settlement loss recognized	0.0	0.0	(0.4)
Net periodic benefit cost	(2.1)	(3.8)	(3.4)
Actuarial loss (gain)	27.8	5.3
Funded status	$ (37.9)	(58.2)
Pension Benefits | UK
Defined Benefit Plan Disclosure [Line Items]
Target allocation of fund assets in equities	3.10%
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	$ (0.7)	1.5	$ (0.7)
Actuarial loss (gain)	7.3	0.8
Funded status	(16.4)	$ (23.6)
Defined benefit plan, expected contribution for next fiscal year	$ 1.1