Segment Information (Schedule of Segment Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting [Line Items]
Total revenue	$ 4,284.2	$ 3,679.6	$ 1,733.8
Selling, general and administrative	773.9	743.7	539.9
Acquisition-related and integration costs	29.0	216.1	37.3
Depreciation and amortization	444.4	352.2	97.2
Interest Expense, Nonoperating	233.7	213.8	57.9
Income Tax Expense (Benefit)	137.3	76.4	86.2
Net income	412.8	206.0	319.8
Service revenue
Segment Reporting [Line Items]
Total revenue	3,363.6	2,732.5	1,050.6
Direct expenses	1,415.7	1,007.6	168.1
Inventory sales revenue
Segment Reporting [Line Items]
Total revenue	920.6	947.1	683.2
Direct expenses	863.8	893.6	608.6
Reportable Segment
Segment Reporting [Line Items]
Total revenue	4,284.2	3,679.6	1,733.8
Selling, general and administrative	773.9	743.7	539.9
Acquisition-related and integration costs	29.0	216.1	37.3
Depreciation and amortization	444.4	352.2	97.2
Interest Expense, Nonoperating	233.7	213.8	57.9
Income Tax Expense (Benefit)	137.3	76.4	86.2
Segment Reporting, Other Segment Item, Amount	(26.4)	(29.8)	(181.2)
Net income	412.8	206.0	319.8
Reportable Segment | Service revenue
Segment Reporting [Line Items]
Direct expenses	1,415.7	1,007.6	168.1
Reportable Segment | Inventory sales revenue
Segment Reporting [Line Items]
Direct expenses	$ 863.8	$ 893.6	$ 608.6