Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2019

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregated Revenue By Source

In the following table, revenue is disaggregated by source (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Net operating fees	$	266.6	$	220.1	$	760.8	$	529.4
Incentive fees	12.3		8.9		41.9		26.8
Other	22.3		21.4		69.4		49.4
Net services revenue	$	301.2	$	250.4	$	872.1	$	605.6

Schedule of Assets and Liabilities

Significant changes in the contract assets and the contract liabilities balances are as follows (in millions):

	Nine Months Ended September 30, 2019				Nine Months Ended September 30, 2018
	Contract assets		Contract liabilities		Contract assets		Contract liabilities
Revenue recognized that was included in the contract liability balance at the beginning of the period	$	—	$	69.0	$	—	$	51.1
Increases due to cash received, excluding amounts recognized as revenue during the period	—		1.6		—		6.5
Acquisitions	—		—		1.3		1.9

The following table provides information about contract assets and contract liabilities from contracts with customers (in millions):

	September 30, 2019		December 31, 2018
Contract assets	$	1.9	$	1.2
Contract liabilities	24.2		22.3

Schedule of Transaction Price Allocated to the Remaining Performance Obligation

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period (in millions). The estimated revenue does not include amounts of variable consideration that are constrained.

	Net operating fees		Incentive fees
2019	$	28.3	$	10.1
2020	36.1		19.0
2021	18.1		—
2022	8.8		—
Thereafter	15.4		—
Total	$	106.7	$	29.1