Segment Information (Schedule of Segment Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting [Line Items]
Total revenue	$ 4,590.7	$ 4,284.2	$ 3,679.6
Selling, general and administrative	905.2	773.9	743.7
Acquisition-related and integration costs	19.4	29.0	216.1
Depreciation and amortization	483.4	444.4	352.2
Interest Expense, Nonoperating	191.6	233.7	213.8
Income Tax Expense (Benefit)	108.0	137.3	76.4
Net income	427.6	412.8	206.0
Service revenue
Segment Reporting [Line Items]
Total revenue	3,502.2	3,363.6	2,732.5
Direct expenses	1,431.3	1,415.7	1,007.6
Inventory sales revenue
Segment Reporting [Line Items]
Total revenue	1,088.5	920.6	947.1
Direct expenses	1,030.6	863.8	893.6
Reportable Segment
Segment Reporting [Line Items]
Total revenue	4,590.7	4,284.2	3,679.6
Selling, general and administrative	905.2	773.9	743.7
Acquisition-related and integration costs	19.4	29.0	216.1
Depreciation and amortization	483.4	444.4	352.2
Interest Expense, Nonoperating	191.6	233.7	213.8
Income Tax Expense (Benefit)	108.0	137.3	76.4
Segment Reporting, Other Segment Item, Amount	(6.4)	(26.4)	(29.8)
Net income	427.6	412.8	206.0
Reportable Segment | Service revenue
Segment Reporting [Line Items]
Direct expenses	1,431.3	1,415.7	1,007.6
Reportable Segment | Inventory sales revenue
Segment Reporting [Line Items]
Direct expenses	$ 1,030.6	$ 863.8	$ 893.6