Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 57.9	$ 4.6
Receivables, less allowances of $12.4 and $12.2	159.8	145.6
Receivable from CyrusOne	7.7	9.2
Inventory, materials and supplies	25.0	23.8
Deferred income taxes	68.9	55.3
Prepaid expenses	15.3	11.0
Other current assets	2.0	1.6
Total current assets	336.6	251.1
Property, plant and equipment, net	859.5	902.8
Investment in CyrusOne	273.6	471.0
Goodwill	14.4	14.4
Intangible assets, net	1.0	91.7
Deferred income taxes	300.7	339.7
Other noncurrent assets	33.9	36.6
Total assets	1,819.7	2,107.3
Current liabilities
Current portion of long-term debt	13.2	12.6
Accounts payable	135.6	89.4
Payable to CyrusOne	0.4	0.5
Unearned revenue and customer deposits	31.7	32.5
Accrued taxes	10.6	12.9
Accrued interest	22.1	31.6
Accrued payroll and benefits	37.3	38.0
Deferred gain in wireless spectrum licenses	112.6	0
Other current liabilities	46.3	36.8
Total current liabilities	409.8	254.3
Long-term debt, less current portion	1,771.0	2,252.6
Pension and postretirement benefit obligations	240.1	202.7
Other noncurrent liabilities	47.3	74.4
Total liabilities	2,468.2	2,784.0
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 December 31, 2014 and 2013; liquidation preference $1,000 per share ($50 per depositary share)	129.4	129.4
Common shares, $.01 par value; 480,000,000 shares authorized; 209,571,138 and 208,656,995 shares issued; 209,296,068 and 208,165,275 shares outstanding at December 31, 2014 and 2013	2.1	2.1
Additional paid-in capital	2,582.9	2,590.6
Accumulated deficit	(3,187.9)	(3,263.5)
Accumulated other comprehensive loss	(173.9)	(133.3)
Common shares in treasury, at cost	(1.1)	(2.0)
Total shareowners' deficit	(648.5)	(676.7)
Total liabilities and shareowners' deficit	$ 1,819.7	$ 2,107.3