World Color Press Inc. Insolvency Proceedings (Components of Restricted Cash) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 2.0	$ 10.2
Defeasance of Unsecured Notes to be Issued [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0.9	7.2
Restricted cash for Class 4 Claim payments [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	1.1	1.1
Other [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 0.0	$ 1.9