Retirement Plans - Narrative (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Reduction of defined benefit plan liability	$ 426.5
Reduction of defined deferred tax assets	351.3
Reduction of defined accumulated other comprehensive loss	906.1
Reduction in pension obligation	354.8
Pension and postretirement contributions	22.5	$ 25.6	$ 41.9
Defined benefit plan, accumulated benefit obligation	$ 961.1	3,916.9
Threshold for recognition in net periodic benefit costs, percentage of projected benefit obligation or fair value of plan assets	10.00%
Multi-employer pension plan withdrawal obligations
Defined Benefit Plan Disclosure [Line Items]
Other Charges	$ 2.3	2.2
Multi-Employer Pension Plans | Multi-employer pension plan withdrawal obligations
Defined Benefit Plan Disclosure [Line Items]
Other Charges	$ 2.3
Complete And Partial Withdrawal From Multi Employer Pension Plans | Multi-employer pension plan withdrawal obligations
Defined Benefit Plan Disclosure [Line Items]
Other Charges			$ 11.5
Hedging Investments
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation percentage	45.00%
Return Seeking Securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation percentage	55.00%
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Reduction in pension obligation	$ 0.0	(6.2)
Benefits Paid	129.7	186.1
Pension and postretirement contributions	12.8
Medicare reimbursements	0.0	0.0
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Reduction in pension obligation	33.8	0.1
Benefits Paid	32.5	32.5
Pension and postretirement contributions	7.7
Reduction in pension liability due to curtailment	35.0
Medicare reimbursements	5.4	$ 5.7
Pension and Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Pension and other postretirement expected contributions for next year	17.0
EGWP
Defined Benefit Plan Disclosure [Line Items]
Medicare reimbursements	5.4
LSC and Donnelley Financial
Defined Benefit Plan Disclosure [Line Items]
Pension and postretirement contributions	2.0
Selling, General and Administrative Expenses
Defined Benefit Plan Disclosure [Line Items]
Pension and other post retirement non-cash settlement expense	21.1
Selling, General and Administrative Expenses | Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	3.3
Net Earnings from Discontinued Operations
Defined Benefit Plan Disclosure [Line Items]
Pension and other post retirement non-cash settlement expense	77.7
Cost of Sales | Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	16.2
Lump Sum Pension Payment Or Annuity
Defined Benefit Plan Disclosure [Line Items]
Benefits Paid	$ 328.4