Significant Accounting Policies and Practices - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) partnership variable_interest_entity voting_interest_model_entity	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Significant Accounting Policies and Practices
Assets related to consolidated VIEs	$ 1,116.2	$ 1,137.7
Liabilities related to consolidated VIEs	894.1	956.3
Restricted cash and cash equivalents	0.2	0.3
Book overdrafts	27.9	23.2
Insurance reserve for general, garage, automobile and workers’ compensation liabilities	$ 47.6	43.5
Number of ownership interest entities | partnership	31
Investments under the equity method of accounting	$ 10.8	10.1
Equity earnings in related investments	1.4	1.3	$ 3.2
Deferred tax liability, undistributed earnings of foreign subsidiaries	$ 0.0
ASU 2021-01
Significant Accounting Policies and Practices
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, immaterial effect	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2020
ASU 2020-10
Significant Accounting Policies and Practices
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, immaterial effect	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2020
ASU 2020-03
Significant Accounting Policies and Practices
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, immaterial effect	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2020
ASU 2020-01
Significant Accounting Policies and Practices
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, immaterial effect	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2020
ASU 2021-08
Significant Accounting Policies and Practices
Change in accounting principle, accounting standards update, immaterial effect	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2022
Change in accounting principle, accounting standards update, early adoption [true false]	true
ASU 2021-10
Significant Accounting Policies and Practices
Change in accounting principle, accounting standards update, immaterial effect	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2022
Change in accounting principle, accounting standards update, early adoption [true false]	true
Accrued and Other Current Liabilities
Significant Accounting Policies and Practices
Insurance reserve for general, garage, automobile and workers’ compensation liabilities	$ 20.0	20.1
Other Noncurrent Liabilities
Significant Accounting Policies and Practices
Insurance reserve for general, garage, automobile and workers’ compensation liabilities	$ 27.6	23.4
Minimum
Significant Accounting Policies and Practices
Ownership interests percentage	30.00%
Maximum
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
Leasehold improvements | Maximum
Significant Accounting Policies and Practices
Ranges of estimated useful life	10 years
Leasehold improvements | Average
Significant Accounting Policies and Practices
Ranges of estimated useful life	3 years 10 months 24 days
Internal-use Software
Significant Accounting Policies and Practices
Ranges of estimated useful life	3 years
Primary Beneficiary
Significant Accounting Policies and Practices
Assets related to consolidated VIEs	$ 54.9	38.7
Liabilities related to consolidated VIEs	$ 52.7	$ 45.1
Number of ownership interest entities | variable_interest_entity	25
Not Primary Beneficiary
Significant Accounting Policies and Practices
Number of ownership interest entities | voting_interest_model_entity	6