Basis of Presentation - Narrative (Detail) shares in Millions	1 Months Ended		3 Months Ended			6 Months Ended
	Aug. 31, 2017 shares	Jun. 30, 2017 shares	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 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
Cost of sales			$ 1,388,900,000		$ 1,318,000,000	$ 2,802,000,000	$ 2,650,100,000
Effective income tax rate			2.30%		(5.60%)	(29.60%)	(17.00%)
Cash payments for income taxes						$ 23,500,000	$ 23,900,000
Cash refunds for income taxes						12,200,000	19,500,000
Increase in tax provisional estimates from changes in the Tax Act				$ 2,300,000
Additional adjustments in tax provisional estimates from changes in the Tax Act						$ 0
Adjustments | Business Services
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Net sales					$ (26,000,000)		(43,400,000)
Cost of sales					(26,000,000)		(43,400,000)
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
Realized gain (loss) on sale of retained shares					92,400,000		92,400,000
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 gain (loss) on sale of retained shares					$ (51,600,000)		$ (51,600,000)