Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2026

Segment Reporting [Abstract]

Segment Revenue, Segment Operating Expenses and Segment Operating Income of our Operating Segments

Segment revenue, segment operating expenses and segment operating income of our operating segments:

	Three Months Ended March 31,
	2026		2025
Revenue	$	6,242.9	$	3,690.4
Segment Operating Expenses:
Salary and service costs:
Salary and related costs	$	3,061.6	$	1,780.5
Third-party service costs	1,365.7		796.8
Third-party incidental costs	212.3		169.0
Total salary and service costs	4,639.6		2,746.3
Occupancy and other costs	527.3		314.6
Segment cost of services	5,166.9		3,060.9
Selling, general and administrative expenses	165.1		84.1
Depreciation and amortization	166.9		59.0
Total segment operating expenses	5,498.9		3,204.0
Segment Operating Income	$	744.0	$	486.4

Reconciliation of Segment Operating Income to Income Before Income Taxes and Income From Equity Method Investments

Reconciliation of segment operating income to income before income taxes and income (loss) from equity method investments:

	Three Months Ended March 31,
	2026		2025
Segment Operating Income	$	744.0	$	486.4
Severance and repositioning costs	4.1		—
Loss on assets held for sale and dispositions	34.3		—
Integration and acquisition related costs	59.4		33.8
Operating Income	646.2		452.6
Interest Expense	119.0		59.1
Interest Income	47.0		29.7
Income Before Income Taxes and Income (Loss) From Equity Method Investments	$	574.2	$	423.2

Revenue and Long-Lived Assets and Goodwill by Geographic Region

Revenue and long-lived assets and goodwill by geographic region:

	Americas		EMEA		Asia-Pacific
March 31, 2026
Revenue - Three months ended	$	4,081.2	$	1,583.2	$	578.5
Long-lived assets and goodwill	$	16,082.8	$	4,170.1	$	777.3
March 31, 2025
Revenue - Three months ended	$	2,207.9	$	1,065.8	$	416.7
Long-lived assets and goodwill	$	8,135.0	$	3,813.2	$	691.1