Discontinued Operations - Narrative (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Oct. 01, 2016
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
External sales			$ 6,895.7	$ 6,937.3	$ 7,172.7
Reduction of costs recognized within selling, general and administrative expenses		$ 3.3
Accounts receivable		1,354.4	1,354.4	1,237.2
Accounts payable		1,001.2	1,001.2	993.9
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		98.0
Purchases of product and services		79.0
Accounts receivable		78.1	78.1
Accounts payable		62.6	62.6
Discontinued Operations Spinoff
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net cash provided by operating activities - discontinued operations			$ 17.8
Forecast | Donnelley Financial Solutions And L S C Communications
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Cash due to affiliates included in accrued liabilities	$ 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 And L S C Communications
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
External sales			$ 150.4	$ 153.4	$ 152.5
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
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
Donnelley Financial and LSC | Spinoff | Available-for-Sale Equity Securities
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Investment held value		$ 328.7	$ 328.7