Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 7.0	$ 11.6
Receivables, less allowances of $18.9 and $14.3	291.4	307.7
Inventory, materials and supplies	37.1	44.6
Prepaid expenses	32.8	28.3
Other current assets	9.2	11.6
Total current assets	377.5	403.8
Property, plant and equipment, net	1,741.8	1,780.8
Operating lease right-of-use assets	35.2	35.8
Goodwill	158.3	160.5
Intangible assets, net	146.1	155.4
Deferred income tax assets	85.6	59.3
Other noncurrent assets	49.7	58.2
Total assets	2,594.2	2,653.8
Current liabilities
Current portion of long-term debt	23.5	22.3
Accounts payable	259.2	284.6
Unearned revenue and customer deposits	55.9	59.1
Accrued taxes	16.5	29.1
Accrued interest	26.7	26.8
Accrued payroll and benefits	41.2	49.0
Other current liabilities	51.8	52.6
Total current liabilities	474.8	523.5
Long-term debt, less current portion	1,933.7	1,901.3
Operating lease liabilities	32.9	32.1
Pension and postretirement benefit obligations	227.0	215.5
Pole license agreement obligation	37.4	38.0
Deferred income tax liability	10.9	11.7
Other noncurrent liabilities	82.1	71.7
Total liabilities	2,798.8	2,793.8
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 June 30, 2020 and December 31, 2019; liquidation preference $1,000 per share ($50 per depositary share)	129.4	129.4
Common shares, $.01 par value; 96,000,000 shares authorized; 50,680,605 and 50,420,700 shares issued and outstanding at June 30, 2020 and December 31, 2019	0.5	0.5
Additional paid-in capital	2,672.9	2,676.2
Accumulated deficit	(2,817.8)	(2,776.0)
Accumulated other comprehensive loss	(189.6)	(170.1)
Total shareowners' deficit	(204.6)	(140.0)
Total liabilities and shareowners' deficit	$ 2,594.2	$ 2,653.8