Significant Accounting Policies and Practices - Narrative (Details) $ / shares in Units, $ in Millions		12 Months Ended
	Oct. 04, 2023 USD ($) $ / shares	Dec. 31, 2023 USD ($) Partnership Variable_interest_entity Voting_interest_model_entity	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Significant Accounting Policies and Practices
Assets related to consolidated VIEs		$ 1,151.9	$ 1,121.4
Liabilities related to consolidated VIEs		901.2	895.7
Restricted cash and cash equivalents		0.2	0.6
Book overdrafts		31.0	30.9
Insurance reserve for general, garage, automobile and workers’ compensation liabilities		$ 50.3	48.4
Number of ownership interest entities | Partnership		26
Investments under the equity method of accounting		$ 12.2	11.9
Equity earnings in related investments		2.6	4.6	$ 1.4
Impairment of long-lived assets		0.0
Contingent cosideration liability		1.0
Deferred tax assets		40.5	41.8
Payment to former minority partner		$ 2.4
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		2.4
Liability for payment of minority partner		1.7	4.0
Accrued and Other Current Liabilities
Significant Accounting Policies and Practices
Insurance reserve for general, garage, automobile and workers’ compensation liabilities		24.9	24.0
Liability for payment of minority partner		0.4	2.4
Other Noncurrent Liabilities
Significant Accounting Policies and Practices
Insurance reserve for general, garage, automobile and workers’ compensation liabilities		25.4	24.4
Liability for payment of minority partner		1.3	1.6
Additional Paid-In Capital
Significant Accounting Policies and Practices
Probability weighting of potential payouts		1.0
Deferred tax assets		$ 0.3
Minimum | Unconsolidated Entities
Significant Accounting Policies and Practices
Ownership interests percentage		30.00%
Maximum | Unconsolidated Entities
Significant Accounting Policies and Practices
Ownership interests percentage		50.00%
Equipment | Minimum
Significant Accounting Policies and Practices
Ranges of estimated useful life		1 year
Equipment | Maximum
Significant Accounting Policies and Practices
Ranges of estimated useful life		10 years
Internal-use Software
Significant Accounting Policies and Practices
Ranges of estimated useful life		3 years
Merger Agreement [Member] | Metropolis Technologies, Inc. [Member]
Significant Accounting Policies and Practices
Total enterprise value	$ 1,500.0
Acquistion price of outstanding common stock | $ / shares	$ 54
Proposed merger related expenses paid		$ 9.7
Primary Beneficiary
Significant Accounting Policies and Practices
Assets related to consolidated VIEs		51.4	57.1
Liabilities related to consolidated VIEs		$ 43.5	$ 50.9
Number of ownership interest entities | Variable_interest_entity		20
Not Primary Beneficiary
Significant Accounting Policies and Practices
Number of ownership interest entities | Voting_interest_model_entity		6