Basis of Presentation - Narrative (Detail) shares in Millions, $ in Millions	1 Months Ended		3 Months Ended
	Aug. 31, 2017 shares	Jun. 30, 2017 shares	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($) shares	Oct. 01, 2016 Entity shares
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of entities resulted from spinoff of an entity | Entity					2
Net sales			$ 1,707.8	$ 1,658.9
Cost of sales			$ 1,413.1	$ 1,332.1
Effective income tax rate			(132.50%)	(0.40%)
Cash payments for income taxes			$ 9.2	$ 15.2
Cash refunds for income taxes			7.1	18.9
Increase in tax provisional estimates from changes in the Tax Act			2.3
Business Services
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Net sales			$ 1,416.1	1,376.4
Adjustments | Business Services
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Net sales				(17.4)
Cost of sales				$ (17.4)
Donnelley Financial Solutions, Inc.
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Common shares distributed during spinoff | shares					26.2
Percentage of tax free distribution of common shares during spinoff					80.75%
Number of common shares held | shares					6.2
Non-cash debt-for-equity exchange, shares | shares	6.2	6.2
LSC Communications, Inc.
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Common shares distributed during spinoff | shares					26.2
Percentage of tax free distribution of common shares during spinoff					80.75%
Number of common shares held | shares				6.2	6.2
Realized loss on the sale of retained shares				$ 51.6