Significant Accounting Policies and Practices - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) Partnership Voting_interest_model_entity Variable_interest_entity	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Significant Accounting Policies and Practices
Assets related to consolidated VIEs	$ 1,125.5		$ 1,121.4
Liabilities related to consolidated VIEs	900.2		895.7
Restricted cash and cash equivalents	0.7		0.6
Allowance for doubtful accounts included in accounts receivable, net	$ 3.9		4.0
Number of ownership interest entities | Partnership	34
Investments under the equity method of accounting	$ 12.1		11.9
Equity earnings in related investments	0.7	$ 0.9
Contingent cosideration liability	1.0
Probability weighting of potential payouts	1.0
Deferred tax assets	0.3
Payment to former minority partner	$ 2.1
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	$ 2.1
Internal-use Software
Significant Accounting Policies and Practices
Property, Plant and Equipment, Useful Life	3 years
Minimum | Equipment [Member]
Significant Accounting Policies and Practices
Property, Plant and Equipment, Useful Life	1 year
Minimum | Unconsolidated Entities
Significant Accounting Policies and Practices
Ownership interests percentage	30.00%
Maximum | Equipment [Member]
Significant Accounting Policies and Practices
Property, Plant and Equipment, Useful Life	10 years
Maximum | Unconsolidated Entities
Significant Accounting Policies and Practices
Ownership interests percentage	50.00%
Primary Beneficiary
Significant Accounting Policies and Practices
Assets related to consolidated VIEs	$ 54.4		57.1
Liabilities related to consolidated VIEs	$ 49.7		$ 50.9
Number of ownership interest entities | Variable_interest_entity	28
Not Primary Beneficiary
Significant Accounting Policies and Practices
Number of ownership interest entities | Voting_interest_model_entity	6