Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 43.7	$ 9.7
Receivables, less allowances of $10.3 and $9.9	170.0	178.6
Inventory, materials and supplies	19.8	22.7
Prepaid expenses	17.7	15.0
Other current assets	6.6	3.9
Total current assets	257.8	229.9
Property, plant and equipment, net	1,112.8	1,085.5
Investment in CyrusOne	0.0	128.0
Goodwill	18.6	14.3
Deferred income taxes, net	50.4	64.5
Other noncurrent assets	17.7	18.8
Total assets	1,457.3	1,541.0
Current liabilities
Current portion of long-term debt	12.0	7.5
Accounts payable	109.0	105.9
Unearned revenue and customer deposits	32.6	36.3
Accrued taxes	19.2	12.9
Accrued interest	13.4	12.7
Accrued payroll and benefits	35.3	25.7
Other current liabilities	31.2	31.9
Total current liabilities	252.7	232.9
Long-term debt, less current portion	1,120.8	1,199.1
Pension and postretirement benefit obligations	186.3	197.7
Other noncurrent liabilities	31.0	33.0
Total liabilities	1,590.8	1,662.7
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 September 30, 2017 and December 31, 2016; liquidation preference $1,000 per share ($50 per depositary share)	129.4	129.4
Common shares, $.01 par value; 96,000,000 shares authorized; 42,182,031 and 42,056,237 shares issued; 42,182,031 and 42,056,237 shares outstanding at September 30, 2017 and December 31, 2016	0.4	0.4
Additional paid-in capital	2,567.3	2,570.9
Accumulated deficit	(2,680.8)	(2,732.1)
Accumulated other comprehensive loss	(149.8)	(90.3)
Total shareowners' deficit	(133.5)	(121.7)
Total liabilities and shareowners' deficit	$ 1,457.3	$ 1,541.0