Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 5.1	$ 23.6
Receivables, less allowances of $12.4 and $13.3	148.1	199.0
Receivable from CyrusOne	8.1	0
Inventory, materials and supplies	23.9	30.7
Deferred income taxes, net	27.6	26.8
Prepaid expenses	13.1	11.8
Other current assets	3.6	11.6
Total current assets	229.5	303.5
Property, plant and equipment, net	873.1	1,587.4
Investment in CyrusOne	500.8	0
Goodwill	14.4	290.6
Intangible assets, net	93.8	196.8
Deferred income taxes, net	399.9	407.8
Other noncurrent assets	40.0	86.3
Total assets	2,151.5	2,872.4
Current liabilities
Current portion of long-term debt	6.6	13.4
Accounts payable	111.7	135.6
Payable to CyrusOne	22.5	0
Unearned revenue and customer deposits	32.0	51.2
Accrued taxes	13.8	21.6
Accrued interest	51.2	41.3
Accrued payroll and benefits	52.1	52.1
Other current liabilities	33.0	40.2
Total current liabilities	322.9	355.4
Long-term debt, less current portion	2,127.4	2,676.0
Pension and postretirement benefit obligations	355.3	362.7
Other noncurrent liabilities	73.7	176.5
Total liabilities	2,879.3	3,570.6
Shareowners' deficit
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 March 31, 2013 and December 31, 2012; liquidation preference $1,000 per share ($50 per depositary share)	129.4	129.4
Common shares, $.01 par value; 480,000,000 shares authorized; 208,450,336 and 202,960,430 shares issued; 207,928,616 and 202,468,710 shares outstanding at March 31, 2013 and December 31, 2012	2.1	2.0
Additional paid-in capital	2,595.4	2,590.9
Accumulated deficit	(3,245.5)	(3,208.8)
Accumulated other comprehensive loss	(207.1)	(209.7)
Common shares in treasury, at cost	(2.1)	(2.0)
Total shareowners' deficit	(727.8)	(698.2)
Total liabilities and shareowners' deficit	$ 2,151.5	$ 2,872.4