Separate Financial Information of Subsidiary Guarantors of Indebtedness (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 11.5	$ 10.8	$ 14.2	$ 9.6
Receivables, less allowances for doubtful accounts	566.9	648.7
Intercompany receivables	0.0	0.0
Inventories	318.0	280.1
Other current assets	64.5	51.7
Total current assets	960.9	991.3
Property, plant and equipment—net	1,531.1	1,675.8
Investment in consolidated entities	0.0	0.0
Intangible assets—net	65.1	110.5
Intercompany loan receivable	0.0	0.0
Other long-term assets	77.3	69.9
Total assets	2,634.4	2,847.5
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	341.8	358.8
Intercompany accounts payable	0.0	0.0
Short-term debt and current portion of long-term debt and capital lease obligations	97.9	99.7
Other current liabilities	360.1	348.9
Total current liabilities	799.8	807.4
Long-term debt and capital lease obligations	1,074.9	1,249.6
Intercompany loan payable	0.0	0.0
Other long-term liabilities	360.2	366.6
Total liabilities	2,234.9	2,423.6
Total shareholders' equity	399.5	423.9
Total liabilities and shareholders' equity	2,634.4	2,847.5
Eliminations [Member]
ASSETS
Cash and cash equivalents	0.0	0.0	0.0	0.0
Receivables, less allowances for doubtful accounts	0.0	0.0
Intercompany receivables	(1,134.9)	(1,007.7)
Inventories	0.0	0.0
Other current assets	0.0	0.0
Total current assets	(1,134.9)	(1,007.7)
Property, plant and equipment—net	0.0	0.0
Investment in consolidated entities	(1,815.6)	(1,734.4)
Intangible assets—net	0.0	0.0
Intercompany loan receivable	(89.7)	(125.8)
Other long-term assets	0.0	0.0
Total assets	(3,040.2)	(2,867.9)
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	0.0	0.0
Intercompany accounts payable	(1,134.9)	(1,007.7)
Short-term debt and current portion of long-term debt and capital lease obligations	0.0	0.0
Other current liabilities	0.0	0.0
Total current liabilities	(1,134.9)	(1,007.7)
Long-term debt and capital lease obligations	0.0	0.0
Intercompany loan payable	(89.7)	(125.8)
Other long-term liabilities	0.0	0.0
Total liabilities	(1,224.6)	(1,133.5)
Total shareholders' equity	(1,815.6)	(1,734.4)
Total liabilities and shareholders' equity	(3,040.2)	(2,867.9)
Quad/Graphics, Inc. [Member]
ASSETS
Cash and cash equivalents	1.9	2.3	2.3	1.9
Receivables, less allowances for doubtful accounts	423.5	507.5
Intercompany receivables	0.0	0.0
Inventories	137.6	95.8
Other current assets	29.6	24.7
Total current assets	592.6	630.3
Property, plant and equipment—net	791.8	849.6
Investment in consolidated entities	1,754.8	1,676.6
Intangible assets—net	13.3	46.9
Intercompany loan receivable	89.7	125.8
Other long-term assets	39.0	27.8
Total assets	3,281.2	3,357.0
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	194.0	203.7
Intercompany accounts payable	1,125.3	997.4
Short-term debt and current portion of long-term debt and capital lease obligations	81.1	95.6
Other current liabilities	257.4	223.4
Total current liabilities	1,657.8	1,520.1
Long-term debt and capital lease obligations	1,056.6	1,242.5
Intercompany loan payable	0.0	0.0
Other long-term liabilities	167.3	170.5
Total liabilities	2,881.7	2,933.1
Total shareholders' equity	399.5	423.9
Total liabilities and shareholders' equity	3,281.2	3,357.0
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	2.4	2.8	3.7	5.6
Receivables, less allowances for doubtful accounts	52.7	53.3
Intercompany receivables	1,134.9	1,007.7
Inventories	127.1	138.5
Other current assets	27.6	20.0
Total current assets	1,344.7	1,222.3
Property, plant and equipment—net	570.7	652.8
Investment in consolidated entities	60.8	57.8
Intangible assets—net	21.9	27.1
Intercompany loan receivable	0.0	0.0
Other long-term assets	6.3	8.5
Total assets	2,004.4	1,968.5
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	75.0	85.4
Intercompany accounts payable	0.0	0.0
Short-term debt and current portion of long-term debt and capital lease obligations	3.4	3.5
Other current liabilities	75.0	94.3
Total current liabilities	153.4	183.2
Long-term debt and capital lease obligations	2.8	5.3
Intercompany loan payable	39.6	38.8
Other long-term liabilities	173.2	175.9
Total liabilities	369.0	403.2
Total shareholders' equity	1,635.4	1,565.3
Total liabilities and shareholders' equity	2,004.4	1,968.5
Non-Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	7.2	5.7	$ 8.2	$ 2.1
Receivables, less allowances for doubtful accounts	90.7	87.9
Intercompany receivables	0.0	0.0
Inventories	53.3	45.8
Other current assets	7.3	7.0
Total current assets	158.5	146.4
Property, plant and equipment—net	168.6	173.4
Investment in consolidated entities	0.0	0.0
Intangible assets—net	29.9	36.5
Intercompany loan receivable	0.0	0.0
Other long-term assets	32.0	33.6
Total assets	389.0	389.9
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	72.8	69.7
Intercompany accounts payable	9.6	10.3
Short-term debt and current portion of long-term debt and capital lease obligations	13.4	0.6
Other current liabilities	27.7	31.2
Total current liabilities	123.5	111.8
Long-term debt and capital lease obligations	15.5	1.8
Intercompany loan payable	50.1	87.0
Other long-term liabilities	19.7	20.2
Total liabilities	208.8	220.8
Total shareholders' equity	180.2	169.1
Total liabilities and shareholders' equity	$ 389.0	$ 389.9