Discontinued Operations - Assets and Liabilities of Discontinued Operations (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Total assets of discontinued operations	$ 149.2	$ 200.6
Total liabilities of discontinued operations	81.1	92.1
Business Services | Disposition by Sale | Logistics | DLS Worldwide
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Receivables, net of allowance	101.2	120.6
Operating lease right-of-use assets	2.8	8.8
Goodwill	28.7	53.3
Intangible assets, net	8.8	10.9
Other assets	7.7	7.0
Total assets of discontinued operations	149.2	200.6
Accounts payable	52.5	53.3
Accrued expenses and other liabilities	28.6	38.8
Total liabilities of discontinued operations	$ 81.1	$ 92.1