Revenue (Tables)

6 Months Ended

Jun. 30, 2026

Revenue from Contract with Customer [Abstract]

The following tables disaggregate revenue by reportable segment and service line (in millions):


		Three Months Ended June 30, 2026
	Revenue recognition timing	Americas		EMEA		APAC		Total
Services	Over time	$	1,267.6	$	159.5	$	374.2	$	1,801.3
Leasing	At a point in time	523.5		59.3		45.7		628.5
Capital markets	At a point in time	160.9		26.7		18.8		206.4
Valuation and other	At a point in time or over time	45.8		49.6		31.0		126.4
Total revenue		$	1,997.8	$	295.1	$	469.7	$	2,762.6


		Three Months Ended June 30, 2025
	Revenue recognition timing	Americas		EMEA		APAC		Total
Services	Over time	$	1,202.1	$	129.5	$	336.4	$	1,668.0
Leasing	At a point in time	388.0		61.7		43.4		493.1
Capital markets	At a point in time	171.7		23.7		12.4		207.8
Valuation and other	At a point in time or over time	42.3		44.9		27.8		115.0
Total revenue		$	1,804.1	$	259.8	$	420.0	$	2,483.9


		Six Months Ended June 30, 2026
	Revenue recognition timing	Americas		EMEA		APAC		Total
Services	Over time	$	2,501.2	$	312.7	$	730.2	$	3,544.1
Leasing	At a point in time	937.4		106.6		82.1		1,126.1
Capital markets	At a point in time	302.8		46.5		38.7		388.0
Valuation and other	At a point in time or over time	85.4		99.4		55.4		240.2
Total revenue		$	3,826.8	$	565.2	$	906.4	$	5,298.4


		Six Months Ended June 30, 2025
	Revenue recognition timing	Americas		EMEA		APAC		Total
Services	Over time	$	2,388.9	$	234.4	$	648.4	$	3,271.7
Leasing	At a point in time	734.3		101.1		76.1		911.5
Capital markets	At a point in time	287.6		41.7		36.3		365.6
Valuation and other	At a point in time or over time	81.7		87.5		50.5		219.7
Total revenue		$	3,492.5	$	464.7	$	811.3	$	4,768.5

Schedule of Contract with Customer, Contract Asset, Contract Liability, and Receivable

The following table provides information on contract assets and contract liabilities from contracts with customers included in the Condensed Consolidated Balance Sheets (in millions):


	As of
	June 30, 2026		December 31, 2025
Short-term contract assets	$	364.2	$	320.9
Contract asset allowances	(20.8)		(19.5)
Short-term contract assets, net	343.4		301.4

Non-current contract assets	58.0		63.1
Contract asset allowances	(4.1)		(2.8)
Non-current contract assets, net included in Other non-current assets	53.9		60.3

Total contract assets, net	$	397.3	$	361.7

Contract liabilities included in Accounts payable and accrued expenses	$	54.4	$	86.6
Contract liabilities included in Other non-current liabilities	18.1		17.4
Total contract liabilities	$	72.5	$	104.0