Segment Reporting (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Segment Reporting [Abstract]
Revenues	$ 5,745.5	$ 5,483.5	$ 11,267.4	$ 10,415.7
Operating Income (Loss)	363.8	370.7	710.2	654.7
Adjusted EBITDA	$ 442.3	444.4	863.0	808.5
Adjusted EBITDA Margin %	11.10%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 5,745.5	5,483.5	11,267.4	10,415.7
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	363.8	370.7	710.2	654.7
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	15,162.7		15,162.7		$ 14,811.7
EES
Segment Reporting [Abstract]
Adjusted EBITDA	$ 189.0	$ 235.4	$ 372.0	$ 427.9
Adjusted EBITDA Margin %	8.60%	10.10%	8.60%	9.70%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,200.3	$ 2,330.1	$ 4,335.4	$ 4,420.1
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,555.9		4,555.9		4,480.4
CSS
Segment Reporting [Abstract]
Adjusted EBITDA	$ 179.5	$ 150.0	$ 335.0	$ 273.1
Adjusted EBITDA Margin %	9.70%	9.40%	9.30%	9.00%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,850.9	$ 1,602.0	$ 3,582.9	$ 3,036.2
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	5,680.6		5,680.6		5,504.0
UBS
Segment Reporting [Abstract]
Adjusted EBITDA	$ 188.6	$ 169.0	$ 376.3	$ 305.4
Adjusted EBITDA Margin %	11.10%	10.90%	11.20%	10.30%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,694.3	$ 1,551.4	$ 3,349.1	$ 2,959.4
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	3,942.1		3,942.1		3,827.4
Corporate Segment
Segment Reporting [Abstract]
Adjusted EBITDA	(114.8)	$ (110.0)	(220.3)	$ (197.9)
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 984.1		$ 984.1		$ 999.9