Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 25.4	$ 57.9
Receivables, less allowances of $10.9 and $12.4	160.2	160.8
Receivable from CyrusOne	3.4	7.7
Inventory, materials and supplies	22.3	25.0
Deferred income taxes, net	22.9	68.9
Prepaid expenses	13.8	10.8
Other current assets	3.3	1.8
Other current assets from discontinued operations	0.0	4.7
Total current assets	251.3	337.6
Property, plant and equipment, net	930.4	815.4
Investment in CyrusOne	68.8	273.6
Goodwill	14.4	14.4
Intangible assets, net	0.3	0.5
Deferred income taxes, net	168.2	300.7
Other noncurrent assets	26.8	33.9
Other noncurrent assets from discontinued operations	0.0	44.6
Total assets	1,460.2	1,820.7
Current liabilities
Current portion of long-term debt	12.4	11.6
Accounts payable	144.6	131.6
Payable to CyrusOne	1.6	0.4
Unearned revenue and customer deposits	26.7	30.4
Accrued taxes	13.5	9.9
Accrued interest	24.1	22.1
Accrued payroll and benefits	32.9	37.0
Other current liabilities	22.2	25.8
Other current liabilities from discontinued operations	11.9	142.0
Total current liabilities	289.9	410.8
Long-term debt, less current portion	1,236.3	1,689.4
Pension and postretirement benefit obligations	215.9	240.1
Other noncurrent liabilities	41.4	26.2
Other noncurrent liabilities from discontinued operations	0.0	102.7
Total liabilities	1,783.5	2,469.2
Shareowners' Deficit [Abstract]
Preferred stock, 2,357,299 shares authorized, 155,250 shares (3,105,000 depositary shares) of 6 3/4% Cumulative Convertible Preferred Stock issued and outstanding at September 30, 2015 and December 31, 2014; liquidation preference $1,000 per share ($50 per depositary share)	129.4	129.4
Common shares, $.01 par value; 480,000,000 shares authorized; 210,004,855 and 209,571,138 shares issued; 209,863,805 and 209,296,068 shares outstanding at September 30, 2015 and December 31, 2014	2.1	2.1
Additional paid-in capital	2,577.6	2,582.9
Accumulated deficit	(2,866.8)	(3,187.9)
Accumulated other comprehensive loss	(165.1)	(173.9)
Common shares in treasury, at cost	(0.5)	(1.1)
Total shareowners' deficit	(323.3)	(648.5)
Total liabilities and shareowners' deficit	$ 1,460.2	$ 1,820.7