Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2023

Incentive Plans

Market Performance Based Awards

		Market
		Performance
	RMS Relative	Vesting
Level	Market Performance	Percentage
Below Threshold Level	≤ -500 basis points	0	%
Threshold Level	-500 basis points	25	%
Target Level	0 basis points	50	%
High Level	≥ 500 basis points	100	%

Schedule of compensation expense and unearned compensation

Below is a summary of our compensation expense and our unearned compensation (in millions):

													Expected
													period to
	Deferred Compensation								Unearned Compensation				recognize
	Expensed				Capitalized				As of		As of		unearned
	Three Months Ended September 30,								September 30,		December 31,		compensation
Type of incentive award	2023		2022		2023		2022		2023		2022		(in years)
Long-term incentive units	$	3.7	$	5.1	$	0.1	$	—	$	21.1	$	20.7	2.3
Performance-based awards		3.1		5.5		0.1		0.2		25.0		30.3	2.3
Service-based restricted stock units		8.2		6.7		1.8		0.9		74.2		55.4	2.7
Interxion awards		0.3		1.6		—		—		0.2		1.9	0.3
	Nine Months Ended September 30,
	2023		2022		2023		2022
Long-term incentive units	$	10.1	$	16.7	$	0.1	$	0.1
Performance-based awards		8.6		16.1		0.2		0.4
Service-based restricted stock units		24.1		18.9		4.4		3.7
Interxion awards		1.6		3.7		0.1		—

Summary of Long-Term Incentive Unit Activity

		Weighted-Average
		Grant Date Fair
Unvested LTIP Units	Units	Value
Unvested, beginning of period	279,258	$	146.37
Granted	179,979		104.78
Vested	(163,717)		135.79
Cancelled or expired	(39,332)		136.30
Unvested, end of period	256,188	$	125.46

Summary of Restricted Stock Activity

		Weighted-Average
		Grant Date Fair
Unvested Restricted Stock Units	Shares	Value
Unvested, beginning of period	507,837	$	131.57
Granted	546,128		115.76
Vested	(295,575)		117.77
Cancelled or expired	(67,800)		117.32
Unvested, end of period	690,590	$	126.38