Segment Information - Schedule of Segment Reporting Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total net sales	$ 1,173.1	$ 1,216.9
Income (Loss) from Operations	25.1	33.1
Depreciation and amortization	33.8	39.2
Capital Expenditures	13.0	17.7
Assets of Operations	2,980.4		$ 3,130.9
Continuing Operations
Segment Reporting Information [Line Items]
Depreciation and amortization	33.8	39.2
Capital Expenditures	13.0	17.7
Assets of Operations	2,980.4		3,130.9
Total Operating Segments
Segment Reporting Information [Line Items]
Total net sales	1,191.6	1,236.9
Income (Loss) from Operations	67.0	62.6
Total Operating Segments | Continuing Operations
Segment Reporting Information [Line Items]
Depreciation and amortization	31.0	38.6
Capital Expenditures	10.8	12.3
Assets of Operations	2,784.6		2,895.2
Intersegment Sales
Segment Reporting Information [Line Items]
Total net sales	(18.5)	(20.0)
Corporate
Segment Reporting Information [Line Items]
Income (Loss) from Operations	(41.9)	(29.5)
Corporate | Continuing Operations
Segment Reporting Information [Line Items]
Depreciation and amortization	2.8	0.6
Capital Expenditures	2.2	5.4
Assets of Operations	195.8		235.7
Business Services
Segment Reporting Information [Line Items]
Total net sales	922.1	893.1
Business Services | Total Operating Segments
Segment Reporting Information [Line Items]
Total net sales	936.0	906.5
Income (Loss) from Operations	53.2	37.7
Business Services | Total Operating Segments | Continuing Operations
Segment Reporting Information [Line Items]
Depreciation and amortization	23.0	24.4
Capital Expenditures	7.8	10.7
Assets of Operations	2,157.0		2,220.9
Business Services | Intersegment Sales
Segment Reporting Information [Line Items]
Total net sales	(13.9)	(13.4)
Marketing Solutions
Segment Reporting Information [Line Items]
Total net sales	251.0	323.8
Marketing Solutions | Total Operating Segments
Segment Reporting Information [Line Items]
Total net sales	255.6	330.4
Income (Loss) from Operations	13.8	24.9
Marketing Solutions | Total Operating Segments | Continuing Operations
Segment Reporting Information [Line Items]
Depreciation and amortization	8.0	14.2
Capital Expenditures	3.0	1.6
Assets of Operations	627.6		$ 674.3
Marketing Solutions | Intersegment Sales
Segment Reporting Information [Line Items]
Total net sales	$ (4.6)	$ (6.6)