Commitments and Contingencies - Narrative (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($) Facility
Commitment And Contingencies [Line Items]
Number of sites cited as potentially responsible party | Facility			2
Number of previously and currently owned sites with potential remediation obligations | Facility			6
Rent expense for facilities in use and equipment	$ 110.0	$ 118.3
Donnelley Financial Solutions, Inc.
Commitment And Contingencies [Line Items]
Potential contingent obligations			$ 5.5
LSC Communications, Inc.
Commitment And Contingencies [Line Items]
Potential contingent obligations			$ 78.8