Discontinued Operations - Narrative (Detail) - USD ($) shares in Millions, $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2017	Dec. 31, 2016	Oct. 01, 2016
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Reduction of costs recognized within selling, general and administrative expenses		$ 2.8
Donnelley Financial Solutions And L S C Communications
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
External sales		82.9
Purchases of product and services		37.1
Accounts receivable	$ 74.5	74.5	$ 78.1
Accounts payable	57.5	57.5	62.6
Discontinued Operations Spinoff
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net cash outflow from operating activities - discontinued operations		(3.8)
Accrued Liabilities | Donnelley Financial Solutions And L S C Communications
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Due to affiliates included in accrued liabilities	78.0	$ 78.0	$ 78.0
Maximum
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Transition service agreement term		24 months
Donnelley Financial Solutions, Inc. | Spinoff | Available-for-Sale Equity Securities
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of common shares held				6.2
Investment held value	$ 120.4	$ 120.4
LSC Communications, Inc.
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Realized loss on sale of shares		51.6
LSC Communications, Inc. | Investment and Other Expense (Income), Net
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Realized loss on sale of shares		$ 51.6
LSC Communications, Inc. | Spinoff
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of common shares sold	6.2	6.2
Net proceeds from sale of common shares	$ 121.4
LSC Communications, Inc. | Spinoff | Available-for-Sale Equity Securities
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of common shares held				6.2