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Discontinued Operations - Narrative (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Nov. 03, 2020	Nov. 02, 2020	May 08, 2019
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain on sale of discontinued operations, net of tax		$ 127.4		$ 0.3
Logistics
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Goodwill impairment	$ 20.6	20.6	$ 98.5
Business Services \| Disposition by Sale
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Cash on disposition of business							$ 11.6
Business Services \| Disposition by Sale \| Logistics
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net sales		632.5	865.7	1,203.8
Gain on sale of discontinued operations, net of tax		127.4
Business Services \| Disposition by Sale \| Logistics \| DLS Worldwide
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Cash on disposition of business						$ 225.0
Escrow deposit						$ 22.5
Net sales		$ 38.7	$ 62.7	$ 106.0
Business Services \| Disposition by Sale \| Logistics \| International Logistics
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Cash on disposition of business					$ 13.0