Revenues (Tables)

12 Months Ended

Dec. 31, 2023

The following tables present revenue disaggregated by revenue source and pattern of revenue recognition (in millions):


	Year Ended December 31, 2023
	Over Time		Point In Time		Total Revenues
Time and materials contracts	$	668.7	$	—	$	668.7
Fixed fee percent complete contracts	56.9		—		56.9
Fixed fee contracts	159.8		—		159.8
Reimbursable expenses	11.3		—		11.3
Total professional services fees	896.7		—		896.7
Other services revenue*	5.7		1.8		7.5
Total services	902.4		1.8		904.2
Software and hardware	—		2.3		2.3
Total revenues	$	902.4	$	4.1	$	906.5

* Other services revenue primarily consists of hosting fees, maintenance, training, internally developed SaaS and partner referral fees.


	Year Ended December 31, 2022
	Over Time		Point In Time		Total Revenues
Time and materials contracts	$	696.0	$	—	$	696.0
Fixed fee percent complete contracts	52.2		—		52.2
Fixed fee contracts	135.0		—		135.0
Reimbursable expenses	9.4		—		9.4
Total professional services fees	892.6		—		892.6
Other services revenue*	7.7		2.1		9.8
Total services	900.3		2.1		902.4
Software and hardware	—		2.7		2.7
Total revenues	$	900.3	$	4.8	$	905.1


	Year Ended December 31, 2021
	Over Time		Point In Time		Total Revenues
Time and materials contracts	$	577.7	$	—	$	577.7
Fixed fee percent complete contracts	49.1		—		49.1
Fixed fee contracts	107.7		—		107.7
Reimbursable expenses	10.7		—		10.7
Total professional services fees	745.2		—		745.2
Other services revenue*	11.3		2.2		13.5
Total services	756.5		2.2		758.7
Software and hardware	—		2.3		2.3
Total revenues	$	756.5	$	4.5	$	761.0

* Other services revenue primarily consists of hosting fees, maintenance, training, internally developed SaaS and partner referral fees.

The following table presents revenue disaggregated by geographic area, as determined by the billing address of customers (in millions):