Significant Accounting Policies and Practices - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) Voting_interest_model_entity Partnership Variable_interest_entity	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Significant Accounting Policies and Practices
Assets related to consolidated VIEs	$ 1,146.3		$ 1,146.3		$ 1,121.4
Liabilities related to consolidated VIEs	904.9		904.9		895.7
Restricted cash and cash equivalents	0.6		0.6		0.6
Allowance for doubtful accounts included in accounts receivable, net	4.1		$ 4.1		4.0
Number of ownership interest entities | Partnership			25
Investments under the equity method of accounting	12.2		$ 12.2		11.9
Equity earnings in related investments	0.6	$ 0.6	1.3	$ 1.5
Contingent cosideration liability	1.0		1.0
Probability weighting of potential payouts	1.0		1.0
Deferred tax assets	$ 0.3		0.3
Payment to former minority partner			$ 2.2
Former minority partner payments term			10 years
Additional payment to former minority partner			$ 4.5
Minority partner payment included in accrued and other current liabilities			$ 2.2
Internal-use Software
Significant Accounting Policies and Practices
Property, Plant and Equipment, Useful Life	3 years		3 years
Minimum | Equipment [Member]
Significant Accounting Policies and Practices
Property, Plant and Equipment, Useful Life	1 year		1 year
Minimum | Unconsolidated Entities
Significant Accounting Policies and Practices
Ownership interests percentage	30.00%		30.00%
Maximum | Equipment [Member]
Significant Accounting Policies and Practices
Property, Plant and Equipment, Useful Life	10 years		10 years
Maximum | Unconsolidated Entities
Significant Accounting Policies and Practices
Ownership interests percentage	50.00%		50.00%
Primary Beneficiary
Significant Accounting Policies and Practices
Assets related to consolidated VIEs	$ 58.6		$ 58.6		57.1
Liabilities related to consolidated VIEs	$ 46.6		$ 46.6		$ 50.9
Number of ownership interest entities | Variable_interest_entity			19
Not Primary Beneficiary
Significant Accounting Policies and Practices
Number of ownership interest entities | Voting_interest_model_entity			6