Segment and Geographic Area Information - Schedule of Segment Reporting Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total net sales	$ 4,766.3	$ 5,473.2	$ 5,702.4
Income (Loss) from Operations	108.1	185.3	181.6
Assets of Operations	3,130.9	3,330.1
Depreciation and amortization	145.7	162.6	172.7
Capital Expenditures	85.6	138.8	104.4
Continuing Operations
Segment Reporting Information [Line Items]
Assets of Operations	3,130.9	3,330.1	3,640.8
Depreciation and amortization	145.7	162.6	172.7
Capital Expenditures	85.6	138.8	104.4
Business Services
Segment Reporting Information [Line Items]
Total net sales	3,685.2	4,192.7	4,521.3
Marketing Solutions
Segment Reporting Information [Line Items]
Total net sales	1,081.1	1,280.5	1,181.1
Total Operating Segments
Segment Reporting Information [Line Items]
Total net sales	4,846.7	5,591.2	5,811.7
Income (Loss) from Operations	284.2	287.0	275.7
Total Operating Segments | Continuing Operations
Segment Reporting Information [Line Items]
Assets of Operations	2,895.2	3,077.0	3,436.4
Depreciation and amortization	142.3	155.5	167.1
Capital Expenditures	65.2	116.3	81.0
Total Operating Segments | Business Services
Segment Reporting Information [Line Items]
Total net sales	3,743.6	4,276.9	4,593.1
Income (Loss) from Operations	227.9	220.0	221.1
Total Operating Segments | Business Services | Continuing Operations
Segment Reporting Information [Line Items]
Assets of Operations	2,220.9	2,328.9	2,761.8
Depreciation and amortization	95.1	101.6	119.7
Capital Expenditures	48.9	79.8	69.4
Total Operating Segments | Marketing Solutions
Segment Reporting Information [Line Items]
Total net sales	1,103.1	1,314.3	1,218.6
Income (Loss) from Operations	56.3	67.0	54.6
Total Operating Segments | Marketing Solutions | Continuing Operations
Segment Reporting Information [Line Items]
Assets of Operations	674.3	748.1	674.6
Depreciation and amortization	47.2	53.9	47.4
Capital Expenditures	16.3	36.5	11.6
Intersegment Sales
Segment Reporting Information [Line Items]
Total net sales	(80.4)	(118.0)	(109.3)
Intersegment Sales | Business Services
Segment Reporting Information [Line Items]
Total net sales	(58.4)	(84.2)	(71.8)
Intersegment Sales | Marketing Solutions
Segment Reporting Information [Line Items]
Total net sales	(22.0)	(33.8)	(37.5)
Corporate
Segment Reporting Information [Line Items]
Income (Loss) from Operations	(176.1)	(101.7)	(94.1)
Assets of Operations	235.7	253.1	204.4
Corporate | Continuing Operations
Segment Reporting Information [Line Items]
Assets of Operations	235.7	253.1	204.4
Depreciation and amortization	3.4	7.1	5.6
Capital Expenditures	$ 20.4	$ 22.5	$ 23.4