Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue
Services	$ 234,300,000	$ 223,700,000	$ 693,500,000	$ 666,300,000
Products	65,500,000	77,700,000	185,000,000	200,300,000
Total revenue	299,800,000	301,400,000	878,500,000	866,600,000
Costs and expenses
Cost of services, excluding items below	120,000,000	106,600,000	348,000,000	303,200,000
Cost of products sold, excluding items below	55,600,000	62,900,000	156,000,000	171,100,000
Selling, general and administrative, excluding items below	52,500,000	52,900,000	161,700,000	151,700,000
Depreciation and amortization	35,800,000	32,300,000	102,400,000	94,400,000
Restructuring charges (reversals)	300,000	(1,300,000)	6,000,000	(100,000)
(Gain) loss on sale or disposal of assets, net	(1,400,000)	0	300,000	(100,000)
Curtailment loss	0	0	300,000	0
Transaction costs	800,000	200,000	800,000	900,000
Total operating costs and expenses	263,600,000	253,600,000	775,500,000	721,100,000
Operating income	36,200,000	47,800,000	103,000,000	145,500,000
Interest expense	21,500,000	34,700,000	82,200,000	113,000,000
Loss on extinguishment of debt	7,800,000	19,400,000	21,300,000	19,400,000
Loss from CyrusOne equity method investment	800,000	0	5,200,000	1,900,000
Gain on sale of CyrusOne equity method investment	(117,700,000)	0	(412,900,000)	(192,800,000)
Other expense (income), net	400,000	0	800,000	(1,200,000)
Income (loss) from continuing operations before income taxes	123,400,000	(6,300,000)	406,400,000	205,200,000
Income tax expense	44,100,000	1,200,000	146,100,000	83,100,000
Income (loss) from continuing operations	79,300,000	(7,500,000)	260,300,000	122,100,000
Income (loss) from discontinued operations, net of tax	1,000,000	(19,800,000)	60,800,000	(28,200,000)
Net income	80,300,000	(27,300,000)	321,100,000	93,900,000
Preferred stock dividends	2,600,000	2,600,000	7,800,000	7,800,000
Net income (loss) applicable to common shareowners	$ 77,700,000	$ (29,900,000)	$ 313,300,000	$ 86,100,000
Basic net earnings (loss) per common share
Basic earnings (loss) per common share from continuing operations	$ 0.37	$ (0.05)	$ 1.21	$ 0.55
Basic earnings (loss) per common share from discontinued operations	0.00	(0.09)	0.29	(0.14)
Basic net earnings (loss) per common share	0.37	(0.14)	1.50	0.41
Diluted net earnings (loss) per common share
Diluted earnings (loss) per common share from continuing operations	0.37	(0.05)	1.20	0.55
Diluted earnings (loss) per common share from discontinued operations	0.00	(0.09)	0.29	(0.14)
Diluted net earnings (loss) per common share	$ 0.37	$ (0.14)	$ 1.49	$ 0.41
Continuing Operations [Member]
Costs and expenses
Net income	$ 79,300,000	$ (7,500,000)	$ 260,300,000	$ 122,100,000
Preferred stock dividends	2,600,000	2,600,000	7,800,000	7,800,000
Discontinued Operations [Member]
Costs and expenses
Selling, general and administrative, excluding items below	0	4,900,000	2,200,000	16,300,000
Depreciation and amortization	0	29,100,000	28,600,000	74,200,000
Restructuring charges (reversals)	(2,100,000.0)	10,300,000	4,300,000	15,500,000
Transaction costs	0	2,800,000	0	2,800,000
Operating income	2,100,000	(31,800,000)	(36,200,000)	(37,000,000)
Other expense (income), net	100,000	200,000	200,000	(1,700,000)
Income tax expense	1,200,000	(12,900,000)	33,400,000	(14,300,000)
Net income	1,000,000	(19,800,000)	60,800,000	(28,200,000)
Preferred stock dividends	$ 0	$ 0	$ 0	$ 0