Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net sales
Net sales	$ 3,923.4	$ 3,985.8	$ 3,951.2
Cost of sales
Cost of sales	3,192.2	3,221.4	3,091.3
Operating expenses
Selling, general and administrative expenses	397.6	358.9	408.7
Depreciation and amortization	209.5	214.9	218.5
Restructuring, impairment and transaction-related charges	89.4	103.3	59.9
Total operating expenses	3,888.7	3,898.5	3,778.4
Operating income from continuing operations	34.7	87.3	172.8
Interest expense	90.0	73.2	70.9
Net pension income	(6.0)	(12.4)	(9.6)
Loss on debt extinguishment	30.5	0.0	2.6
Earnings (loss) from continuing operations before income taxes and equity in (earnings) loss of unconsolidated entity	(79.8)	26.5	108.9
Income tax benefit	(24.4)	(2.4)	(9.2)
Earnings (loss) from continuing operations before equity in (earnings) loss of unconsolidated entity	(55.4)	28.9	118.1
Equity in (earnings) loss of unconsolidated entity	0.3	(1.0)	0.0
Net earnings (loss) from continuing operations	(55.7)	29.9	118.1
Loss from discontinued operations, net of tax	(100.6)	(22.0)	(10.9)
Net earnings (loss)	(156.3)	7.9	107.2
Less: net loss attributable to noncontrolling interests	0.0	(0.6)	0.0
Net earnings (loss) attributable to Quad common shareholders	$ (156.3)	$ 8.5	$ 107.2
Earnings (loss) per share attributable to Quad common shareholders
Basic (in dollars per share)	$ (3.12)	$ 0.17	$ 2.16
Basic, continuing operations (in dollars per share)	(1.11)	0.61	2.38
Basic, discontinued operations (in dollars per share)	(2.01)	(0.44)	(0.22)
Diluted (in dollars per share)	(3.12)	0.16	2.07
Diluted, continuing operations (in dollars per share)	(1.11)	0.59	2.28
Diluted, discontinued operations (in dollars per share)	$ (2.01)	$ (0.43)	$ (0.21)
Weighted average number of common shares outstanding
Basic (in shares)	50.0	49.8	49.6
Diluted (in shares)	50.0	51.6	51.8
Product
Net sales
Net sales	$ 3,098.3	$ 3,184.4	$ 3,348.8
Cost of sales
Cost of sales	2,615.6	2,621.1	2,659.2
Service
Net sales
Net sales	825.1	801.4	602.4
Cost of sales
Cost of sales	$ 576.6	$ 600.3	$ 432.1