Incentive Plan - Schedule of Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Long-term incentive units
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred compensation, expensed	$ 15.4	$ 12.8	$ 8.7
Deferred compensation, capitalized	0.2	0.2	0.2
Unearned Compensation	$ 19.8	$ 15.1
Expected period to recognize unearned compensation (in years)	2 years 6 months	2 years 6 months
Market performance-based awards
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred compensation, expensed	$ 23.9	$ 24.8	13.0
Deferred compensation, capitalized	0.7	0.6	0.8
Unearned Compensation	$ 39.2	$ 34.4
Expected period to recognize unearned compensation (in years)	1 year 1 month 6 days	1 year 1 month 6 days
Service Based Restricted Stock Units
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred compensation, expensed	$ 23.2	$ 15.1	11.5
Deferred compensation, capitalized	3.3	3.2	$ 2.8
Unearned Compensation	$ 44.5	$ 41.5
Expected period to recognize unearned compensation (in years)	2 years 4 months 24 days	2 years 4 months 24 days
Interxion awards
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred compensation, expensed	$ 17.7	$ 19.7
Unearned Compensation	$ 8.5	$ 27.2
Expected period to recognize unearned compensation (in years)	1 year 9 months 18 days	1 year 9 months 18 days