Supplemental Guarantor Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Revenue	$ 312.0	$ 368.2	$ 637.7	$ 731.0
Operating costs and expenses	265.2	303.0	571.7	584.8
Operating (loss) income	46.8	65.2	66.0	146.2
Interest expense (income), net	45.4	53.7	93.3	108.1
Other (income) expense, net	0.1	0	(0.2)	1.5
(Loss) income before equity in earnings of subsidiaries and income taxes	(3.4)	11.5	(33.7)	36.6
Income tax (benefit) expense	(4.2)	7.0	2.2	19.5
Net income (loss)	0.8	4.5	(35.9)	17.1
Total comprehensive income (loss)	9.8	7.2	(24.3)	21.2
Preferred stock dividends	2.6	2.6	5.2	5.2
Net income (loss) applicable to common shareowners	(1.8)	1.9	(41.1)	11.9
Condensed Consolidating Balance Sheets
Cash and cash equivalents	5.5	4.1	5.5	4.1
Other current assets	1.4		1.4		11.6
Total current assets	231.5		231.5		303.5
Property, plant and equipment, net	879.0		879.0		1,587.4
Investment in CyrusOne	489.3		489.3		0
Other noncurrent assets	41.1		41.1		86.3
Total assets	2,145.4		2,145.4		2,872.4
Current portion of long-term debt	7.2		7.2		13.4
Accounts payable	103.1		103.1		135.6
Other current liabilities	33.7		33.7		40.2
Total current liabilities	274.7		274.7		355.4
Long-term debt, less current portion	2,183.0		2,183.0		2,676.0
Other noncurrent liabilities	73.8		73.8		176.5
Total liabilities	2,865.1		2,865.1		3,570.6
Shareowners' (deficit) equity	(719.7)		(719.7)		(698.2)
Total liabilities and shareowners' equity (deficit)	2,145.4		2,145.4		2,872.4
Condensed Consolidating Statements of Cash Flows
Cash flows (used in) provided by operating activities			29.4	91.9
Capital expenditures	(45.0)	(82.8)	(95.9)	(167.4)
Dividends received from CyrusOne	7.0		7.0	0
Proceeds from sale of assets			1.6	0
Cash divested from deconsolidation of CyrusOne			(12.2)	0
Cash flows used in investing activities			(99.1)	(167.4)
Borrowings on revolving facilities, net			56.8	19.0
Repayment of debt			(4.8)	(8.0)
Common stock repurchase			0	(0.3)
Proceeds from exercise of options and warrants			6.6	0
Other financing activities			(2.3)	0.4
Cash flows provided by (used in) financing activities			51.6	5.9
(Decrease) increase in cash and cash equivalents			(18.1)	(69.6)
Cash and cash equivalents at beginning of period			23.6	73.7
Cash and cash equivalents at end of period	5.5	4.1	5.5	4.1
Notes guaranteed by subsidiaries [Member]
Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Revenue	312.0	368.2	637.7	731.0
Operating costs and expenses	265.2	303.0	571.7	584.8
Operating (loss) income	46.8	65.2	66.0	146.2
Interest expense (income), net	45.4	53.7	93.3	108.1
Other (income) expense, net	4.8	0	6.4	1.5
(Loss) income before equity in earnings of subsidiaries and income taxes	(3.4)	11.5	(33.7)	36.6
Income tax (benefit) expense	(4.2)	7.0	2.2	19.5
Equity in earnings of subsidiaries, net of tax	0	0	0	0
Net income (loss)	0.8	4.5	(35.9)	17.1
Other comprehensive income (loss)	9.0	2.7	11.6	4.1
Total comprehensive income (loss)	9.8	7.2	(24.3)	21.2
Preferred stock dividends	2.6	2.6	5.2	5.2
Net income (loss) applicable to common shareowners	(1.8)	1.9	(41.1)	11.9
Condensed Consolidating Balance Sheets
Cash and cash equivalents	5.5	4.1	5.5	4.1
Receivables, net	156.2		156.2		199.0
Other current assets	69.8		69.8		80.9
Total current assets	231.5		231.5		303.5
Property, plant and equipment, net	879.0		879.0		1,587.4
Investment in CyrusOne	489.3		489.3
Goodwill and intangibles, net	107.6		107.6		487.4
Investments in and advances to subsidiaries	0		0		0
Other noncurrent assets	438.0		438.0		494.1
Total assets	2,145.4		2,145.4		2,872.4
Current portion of long-term debt	7.2		7.2		13.4
Accounts payable	104.9		104.9		135.6
Other current liabilities	162.6		162.6		206.4
Total current liabilities	274.7		274.7		355.4
Long-term debt, less current portion	2,183.0		2,183.0		2,676.0
Other noncurrent liabilities	407.4		407.4		539.2
Intercompany payables	0		0		0
Total liabilities	2,865.1		2,865.1		3,570.6
Shareowners' (deficit) equity	(719.7)		(719.7)		(698.2)
Total liabilities and shareowners' equity (deficit)	2,145.4		2,145.4		2,872.4
Condensed Consolidating Statements of Cash Flows
Cash flows (used in) provided by operating activities			29.4	91.9
Capital expenditures			(95.9)	(167.4)
Dividends received from CyrusOne			7.0
Proceeds from sale of assets			1.6	0
Cash divested from deconsolidation of CyrusOne			(12.2)
Other investing activities			0.4	0
Cash flows used in investing activities			(99.1)	(167.4)
Funding between Parent and subsidiaries, net			0	0
Borrowings on revolving facilities, net			56.8	19.0
Repayment of debt			(4.8)	(8.0)
Common stock repurchase			0	(0.3)
Proceeds from exercise of options and warrants			6.6
Other financing activities			(7.0)	(4.8)
Cash flows provided by (used in) financing activities			51.6	5.9
(Decrease) increase in cash and cash equivalents			(18.1)	(69.6)
Cash and cash equivalents at beginning of period			23.6	73.7
Cash and cash equivalents at end of period	5.5	4.1	5.5	4.1
Notes guaranteed by subsidiaries [Member] | Parent Company [Member]
Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Revenue	0	0	0	0
Operating costs and expenses	13.6	4.0	49.7	11.1
Operating (loss) income	(13.6)	(4.0)	(49.7)	(11.1)
Interest expense (income), net	46.3	40.8	82.1	81.4
Other (income) expense, net	(0.3)	(0.3)	(0.7)	(0.7)
(Loss) income before equity in earnings of subsidiaries and income taxes	(59.6)	(44.5)	(131.1)	(91.8)
Income tax (benefit) expense	(21.2)	(15.7)	(41.3)	(29.8)
Equity in earnings of subsidiaries, net of tax	39.2	33.3	53.9	79.1
Net income (loss)	0.8	4.5	(35.9)	17.1
Other comprehensive income (loss)	8.9	2.7	11.7	4.1
Total comprehensive income (loss)	9.7	7.2	(24.2)	21.2
Preferred stock dividends	2.6	2.6	5.2	5.2
Net income (loss) applicable to common shareowners	(1.8)	1.9	(41.1)	11.9
Condensed Consolidating Balance Sheets
Cash and cash equivalents	3.3	0.4	3.3	0.4
Receivables, net	0.9		0.9		1.0
Other current assets	3.5		3.5		3.1
Total current assets	7.7		7.7		7.9
Property, plant and equipment, net	0.1		0.1		0.1
Investment in CyrusOne	0		0
Goodwill and intangibles, net	0		0		0
Investments in and advances to subsidiaries	1,419.1		1,419.1		1,449.9
Other noncurrent assets	389.2		389.2		384.6
Total assets	1,816.1		1,816.1		1,842.5
Current portion of long-term debt	0		0		0
Accounts payable	0.7		0.7		1.2
Other current liabilities	79.2		79.2		85.6
Total current liabilities	79.9		79.9		86.8
Long-term debt, less current portion	1,850.6		1,850.6		1,841.7
Other noncurrent liabilities	346.3		346.3		383.3
Intercompany payables	259.0		259.0		228.9
Total liabilities	2,535.8		2,535.8		2,540.7
Shareowners' (deficit) equity	(719.7)		(719.7)		(698.2)
Total liabilities and shareowners' equity (deficit)	1,816.1		1,816.1		1,842.5
Condensed Consolidating Statements of Cash Flows
Cash flows (used in) provided by operating activities			(123.1)	(75.0)
Capital expenditures			0	0
Dividends received from CyrusOne			0
Proceeds from sale of assets			0	0
Cash divested from deconsolidation of CyrusOne			0
Other investing activities			0	0
Cash flows used in investing activities			0	0
Funding between Parent and subsidiaries, net			115.0	10.8
Borrowings on revolving facilities, net			8.0	0
Repayment of debt			0	0
Common stock repurchase			0	(0.3)
Proceeds from exercise of options and warrants			6.6
Other financing activities			(7.0)	(4.7)
Cash flows provided by (used in) financing activities			122.6	5.8
(Decrease) increase in cash and cash equivalents			(0.5)	(69.2)
Cash and cash equivalents at beginning of period			3.8	69.6
Cash and cash equivalents at end of period	3.3	0.4	3.3	0.4
Notes guaranteed by subsidiaries [Member] | Guarantor Subsidiaries [Member]
Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Revenue	177.6	178.3	353.3	353.9
Operating costs and expenses	163.5	160.5	333.6	316.8
Operating (loss) income	14.1	17.8	19.7	37.1
Interest expense (income), net	3.8	2.1	7.7	3.8
Other (income) expense, net	4.2	1.4	8.9	4.1
(Loss) income before equity in earnings of subsidiaries and income taxes	6.1	14.3	3.1	29.2
Income tax (benefit) expense	(0.7)	7.2	8.8	11.6
Equity in earnings of subsidiaries, net of tax	0	(12.7)	0.7	(13.8)
Net income (loss)	6.8	(5.6)	(5.0)	3.8
Other comprehensive income (loss)	0	0	0	0
Total comprehensive income (loss)	6.8	(5.6)	(5.0)	3.8
Preferred stock dividends	0	0	0	0
Net income (loss) applicable to common shareowners	6.8	(5.6)	(5.0)	3.8
Condensed Consolidating Balance Sheets
Cash and cash equivalents	0.7	0.7	0.7	0.7
Receivables, net	7.4		7.4		1.2
Other current assets	31.5		31.5		27.7
Total current assets	39.6		39.6		29.2
Property, plant and equipment, net	197.4		197.4		220.9
Investment in CyrusOne	489.3		489.3
Goodwill and intangibles, net	105.3		105.3		106.4
Investments in and advances to subsidiaries	340.3		340.3		506.4
Other noncurrent assets	189.6		189.6		218.5
Total assets	1,361.5		1,361.5		1,081.4
Current portion of long-term debt	3.0		3.0		3.9
Accounts payable	66.4		66.4		90.2
Other current liabilities	34.9		34.9		33.6
Total current liabilities	104.3		104.3		127.7
Long-term debt, less current portion	87.3		87.3		88.4
Other noncurrent liabilities	63.6		63.6		90.6
Intercompany payables	158.8		158.8		160.0
Total liabilities	414.0		414.0		466.7
Shareowners' (deficit) equity	947.5		947.5		614.7
Total liabilities and shareowners' equity (deficit)	1,361.5		1,361.5		1,081.4
Condensed Consolidating Statements of Cash Flows
Cash flows (used in) provided by operating activities			13.1	19.4
Capital expenditures			(18.9)	(14.9)
Dividends received from CyrusOne			7.0
Proceeds from sale of assets			0	0
Cash divested from deconsolidation of CyrusOne			0
Other investing activities			0	0
Cash flows used in investing activities			(11.9)	(14.9)
Funding between Parent and subsidiaries, net			1.5	(1.8)
Borrowings on revolving facilities, net			0	0
Repayment of debt			(2.3)	(2.6)
Common stock repurchase			0	0
Proceeds from exercise of options and warrants			0
Other financing activities			0	(0.1)
Cash flows provided by (used in) financing activities			(0.8)	(4.5)
(Decrease) increase in cash and cash equivalents			0.4	0
Cash and cash equivalents at beginning of period			0.3	0.7
Cash and cash equivalents at end of period	0.7	0.7	0.7	0.7
Notes guaranteed by subsidiaries [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Revenue	148.4	205.3	312.5	408.1
Operating costs and expenses	102.1	153.9	216.5	287.9
Operating (loss) income	46.3	51.4	96.0	120.2
Interest expense (income), net	(4.7)	10.8	3.5	22.9
Other (income) expense, net	0.9	(1.1)	(1.8)	(1.9)
(Loss) income before equity in earnings of subsidiaries and income taxes	50.1	41.7	94.3	99.2
Income tax (benefit) expense	17.7	15.5	34.7	37.7
Equity in earnings of subsidiaries, net of tax	0	0	0	0
Net income (loss)	32.4	26.2	59.6	61.5
Other comprehensive income (loss)	0.1	0	(0.1)	0
Total comprehensive income (loss)	32.5	26.2	59.5	61.5
Preferred stock dividends	0	0	0	0
Net income (loss) applicable to common shareowners	32.4	26.2	59.6	61.5
Condensed Consolidating Balance Sheets
Cash and cash equivalents	1.5	3.0	1.5	3.0
Receivables, net	147.9		147.9		196.8
Other current assets	35.3		35.3		50.5
Total current assets	184.7		184.7		266.8
Property, plant and equipment, net	681.5		681.5		1,366.4
Investment in CyrusOne	0		0
Goodwill and intangibles, net	2.3		2.3		381.0
Investments in and advances to subsidiaries	251.1		251.1		192.5
Other noncurrent assets	7.5		7.5		54.1
Total assets	1,127.1		1,127.1		2,260.8
Current portion of long-term debt	4.2		4.2		9.5
Accounts payable	37.8		37.8		44.2
Other current liabilities	47.8		47.8		86.3
Total current liabilities	89.8		89.8		140.0
Long-term debt, less current portion	245.1		245.1		745.9
Other noncurrent liabilities	147.0		147.0		229.7
Intercompany payables	41.8		41.8		102.6
Total liabilities	523.7		523.7		1,218.2
Shareowners' (deficit) equity	603.4		603.4		1,042.6
Total liabilities and shareowners' equity (deficit)	1,127.1		1,127.1		2,260.8
Condensed Consolidating Statements of Cash Flows
Cash flows (used in) provided by operating activities			139.4	147.5
Capital expenditures			(77.0)	(152.5)
Dividends received from CyrusOne			0
Proceeds from sale of assets			1.6	0
Cash divested from deconsolidation of CyrusOne			(12.2)
Other investing activities			0.4	0
Cash flows used in investing activities			(87.2)	(152.5)
Funding between Parent and subsidiaries, net			(116.5)	(9.0)
Borrowings on revolving facilities, net			48.8	19.0
Repayment of debt			(2.5)	(5.4)
Common stock repurchase			0	0
Proceeds from exercise of options and warrants			0
Other financing activities			0	0
Cash flows provided by (used in) financing activities			(70.2)	4.6
(Decrease) increase in cash and cash equivalents			(18.0)	(0.4)
Cash and cash equivalents at beginning of period			19.5	3.4
Cash and cash equivalents at end of period	1.5	3.0	1.5	3.0
Notes guaranteed by subsidiaries [Member] | Consolidation, Eliminations [Member]
Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Revenue	(14.0)	(15.4)	(28.1)	(31.0)
Operating costs and expenses	(14.0)	(15.4)	(28.1)	(31.0)
Operating (loss) income	0	0	0	0
Interest expense (income), net	0	0	0	0
Other (income) expense, net	0	0	0	0
(Loss) income before equity in earnings of subsidiaries and income taxes	0	0	0	0
Income tax (benefit) expense	0	0	0	0
Equity in earnings of subsidiaries, net of tax	(39.2)	(20.6)	(54.6)	(65.3)
Net income (loss)	(39.2)	(20.6)	(54.6)	(65.3)
Other comprehensive income (loss)	0	0	0	0
Total comprehensive income (loss)	(39.2)	(20.6)	(54.6)	(65.3)
Preferred stock dividends	0	0	0	0
Net income (loss) applicable to common shareowners	(39.2)	(20.6)	(54.6)	(65.3)
Condensed Consolidating Balance Sheets
Cash and cash equivalents	0	0	0	0
Receivables, net	0		0		0
Other current assets	(0.5)		(0.5)		(0.4)
Total current assets	(0.5)		(0.5)		(0.4)
Property, plant and equipment, net	0		0		0
Investment in CyrusOne	0		0
Goodwill and intangibles, net	0		0		0
Investments in and advances to subsidiaries	(2,010.5)		(2,010.5)		(2,148.8)
Other noncurrent assets	(148.3)		(148.3)		(163.1)
Total assets	(2,159.3)		(2,159.3)		(2,312.3)
Current portion of long-term debt	0		0		0
Accounts payable	0		0		0
Other current liabilities	0.7		0.7		0.9
Total current liabilities	0.7		0.7		0.9
Long-term debt, less current portion	0		0		0
Other noncurrent liabilities	(149.5)		(149.5)		(164.4)
Intercompany payables	(459.6)		(459.6)		(491.5)
Total liabilities	(608.4)		(608.4)		(655.0)
Shareowners' (deficit) equity	(1,550.9)		(1,550.9)		(1,657.3)
Total liabilities and shareowners' equity (deficit)	(2,159.3)		(2,159.3)		(2,312.3)
Condensed Consolidating Statements of Cash Flows
Cash flows (used in) provided by operating activities			0	0
Capital expenditures			0	0
Dividends received from CyrusOne			0
Proceeds from sale of assets			0	0
Cash divested from deconsolidation of CyrusOne			0
Other investing activities			0	0
Cash flows used in investing activities			0	0
Funding between Parent and subsidiaries, net			0	0
Borrowings on revolving facilities, net			0	0
Repayment of debt			0	0
Common stock repurchase			0	0
Proceeds from exercise of options and warrants			0
Other financing activities			0	0
Cash flows provided by (used in) financing activities			0	0
(Decrease) increase in cash and cash equivalents			0	0
Cash and cash equivalents at beginning of period			0	0
Cash and cash equivalents at end of period	0	0	0	0
Notes guaranteed by parent [Member]
Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Revenue	312.0	368.2	637.7	731.0
Operating costs and expenses	265.2	303.0	571.7	584.8
Operating (loss) income	46.8	65.2	66.0	146.2
Interest expense (income), net	45.4	53.7	93.3	108.1
Other (income) expense, net	4.8	0	6.4	1.5
(Loss) income before equity in earnings of subsidiaries and income taxes	(3.4)	11.5	(33.7)	36.6
Income tax (benefit) expense	(4.2)	7.0	2.2	19.5
Equity in earnings of subsidiaries, net of tax	0	0	0	0
Net income (loss)	0.8	4.5	(35.9)	17.1
Other comprehensive income (loss)	9.0	2.7	11.6	4.1
Total comprehensive income (loss)	9.8	7.2	(24.3)	21.2
Preferred stock dividends	2.6	2.6	5.2	5.2
Net income (loss) applicable to common shareowners	(1.8)	1.9	(41.1)	11.9
Condensed Consolidating Balance Sheets
Cash and cash equivalents	5.5	4.1	5.5	4.1
Receivables, net	156.2		156.2		199.0
Other current assets	69.8		69.8		80.9
Total current assets	231.5		231.5		303.5
Property, plant and equipment, net	879.0		879.0		1,587.4
Investment in CyrusOne	489.3		489.3
Goodwill and intangibles, net	107.6		107.6		487.4
Investments in and advances to subsidiaries	0		0		0
Other noncurrent assets	438.0		438.0		494.1
Total assets	2,145.4		2,145.4		2,872.4
Current portion of long-term debt	7.2		7.2		13.4
Accounts payable	104.9		104.9		135.6
Other current liabilities	162.6		162.6		206.4
Total current liabilities	274.7		274.7		355.4
Long-term debt, less current portion	2,183.0		2,183.0		2,676.0
Other noncurrent liabilities	407.4		407.4		539.2
Intercompany payables	0		0		0
Total liabilities	2,865.1		2,865.1		3,570.6
Shareowners' (deficit) equity	(719.7)		(719.7)		(698.2)
Total liabilities and shareowners' equity (deficit)	2,145.4		2,145.4		2,872.4
Condensed Consolidating Statements of Cash Flows
Cash flows (used in) provided by operating activities			29.4	91.9
Capital expenditures			(95.9)	(167.4)
Dividends received from CyrusOne			7.0
Proceeds from sale of assets			1.6	0
Cash divested from deconsolidation of CyrusOne			(12.2)
Other investing activities			0.4	0
Cash flows used in investing activities			(99.1)	(167.4)
Funding between Parent and subsidiaries, net			0	0
Borrowings on revolving facilities, net			56.8	19.0
Repayment of debt			(4.8)	(8.0)
Common stock repurchase			0	(0.3)
Proceeds from exercise of options and warrants			6.6
Other financing activities			(7.0)	(4.8)
Cash flows provided by (used in) financing activities			51.6	5.9
(Decrease) increase in cash and cash equivalents			(18.1)	(69.6)
Cash and cash equivalents at beginning of period			23.6	73.7
Cash and cash equivalents at end of period	5.5	4.1	5.5	4.1
Notes guaranteed by parent [Member] | Parent Company [Member]
Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Revenue	0	0	0	0
Operating costs and expenses	13.6	4.0	49.7	11.1
Operating (loss) income	(13.6)	(4.0)	(49.7)	(11.1)
Interest expense (income), net	46.3	40.8	82.1	81.4
Other (income) expense, net	(0.3)	(0.3)	(0.7)	(0.7)
(Loss) income before equity in earnings of subsidiaries and income taxes	(59.6)	(44.5)	(131.1)	(91.8)
Income tax (benefit) expense	(21.2)	(15.7)	(41.3)	(29.8)
Equity in earnings of subsidiaries, net of tax	39.2	33.3	53.9	79.1
Net income (loss)	0.8	4.5	(35.9)	17.1
Other comprehensive income (loss)	8.9	2.7	11.7	4.1
Total comprehensive income (loss)	9.7	7.2	(24.2)	21.2
Preferred stock dividends	2.6	2.6	5.2	5.2
Net income (loss) applicable to common shareowners	(1.8)	1.9	(41.1)	11.9
Condensed Consolidating Balance Sheets
Cash and cash equivalents	3.3	0.4	3.3	0.4
Receivables, net	0.9		0.9		1.0
Other current assets	3.5		3.5		3.1
Total current assets	7.7		7.7		7.9
Property, plant and equipment, net	0.1		0.1		0.1
Investment in CyrusOne	0		0
Goodwill and intangibles, net	0		0		0
Investments in and advances to subsidiaries	1,419.1		1,419.1		1,449.9
Other noncurrent assets	389.2		389.2		384.6
Total assets	1,816.1		1,816.1		1,842.5
Current portion of long-term debt	0		0		0
Accounts payable	0.7		0.7		1.2
Other current liabilities	79.2		79.2		85.6
Total current liabilities	79.9		79.9		86.8
Long-term debt, less current portion	1,850.6		1,850.6		1,841.7
Other noncurrent liabilities	346.3		346.3		383.3
Intercompany payables	259.0		259.0		228.9
Total liabilities	2,535.8		2,535.8		2,540.7
Shareowners' (deficit) equity	(719.7)		(719.7)		(698.2)
Total liabilities and shareowners' equity (deficit)	1,816.1		1,816.1		1,842.5
Condensed Consolidating Statements of Cash Flows
Cash flows (used in) provided by operating activities			(123.1)	(75.0)
Capital expenditures			0	0
Dividends received from CyrusOne			0
Proceeds from sale of assets			0	0
Cash divested from deconsolidation of CyrusOne			0
Other investing activities			0	0
Cash flows used in investing activities			0	0
Funding between Parent and subsidiaries, net			115.0	10.8
Borrowings on revolving facilities, net			8.0	0
Repayment of debt			0	0
Common stock repurchase			0	(0.3)
Proceeds from exercise of options and warrants			6.6
Other financing activities			(7.0)	(4.7)
Cash flows provided by (used in) financing activities			122.6	5.8
(Decrease) increase in cash and cash equivalents			(0.5)	(69.2)
Cash and cash equivalents at beginning of period			3.8	69.6
Cash and cash equivalents at end of period	3.3	0.4	3.3	0.4
Notes guaranteed by parent [Member] | Cincinnati Bell Telephone Company [Member]
Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Revenue	161.6	161.3	320.9	321.2
Operating costs and expenses	113.6	108.4	224.7	212.8
Operating (loss) income	48.0	52.9	96.2	108.4
Interest expense (income), net	(5.6)	(0.1)	(1.1)	(0.2)
Other (income) expense, net	0.9	1.2	2.6	2.3
(Loss) income before equity in earnings of subsidiaries and income taxes	52.7	51.8	94.7	106.3
Income tax (benefit) expense	18.3	18.7	34.8	38.5
Equity in earnings of subsidiaries, net of tax	0	0	0	0
Net income (loss)	34.4	33.1	59.9	67.8
Other comprehensive income (loss)	0	0	0	0
Total comprehensive income (loss)	34.4	33.1	59.9	67.8
Preferred stock dividends	0	0	0	0
Net income (loss) applicable to common shareowners	34.4	33.1	59.9	67.8
Condensed Consolidating Balance Sheets
Cash and cash equivalents	1.3	1.3	1.3	1.3
Receivables, net	0		0		0
Other current assets	31.6		31.6		34.4
Total current assets	32.9		32.9		36.3
Property, plant and equipment, net	679.6		679.6		646.7
Investment in CyrusOne	0		0
Goodwill and intangibles, net	2.3		2.3		2.3
Investments in and advances to subsidiaries	266.1		266.1		228.2
Other noncurrent assets	8.6		8.6		6.3
Total assets	989.5		989.5		919.8
Current portion of long-term debt	3.9		3.9		3.0
Accounts payable	59.2		59.2		61.7
Other current liabilities	49.4		49.4		50.2
Total current liabilities	112.5		112.5		114.9
Long-term debt, less current portion	142.7		142.7		141.3
Other noncurrent liabilities	149.3		149.3		138.6
Intercompany payables	0		0		0
Total liabilities	404.5		404.5		394.8
Shareowners' (deficit) equity	585.0		585.0		525.0
Total liabilities and shareowners' equity (deficit)	989.5		989.5		919.8
Condensed Consolidating Statements of Cash Flows
Cash flows (used in) provided by operating activities			106.6	112.7
Capital expenditures			(69.3)	(47.7)
Dividends received from CyrusOne			0
Proceeds from sale of assets			1.6	0
Cash divested from deconsolidation of CyrusOne			0
Other investing activities			0	0
Cash flows used in investing activities			(67.7)	(47.7)
Funding between Parent and subsidiaries, net			(37.9)	(63.5)
Borrowings on revolving facilities, net			0	0
Repayment of debt			(1.6)	(1.6)
Common stock repurchase			0	0
Proceeds from exercise of options and warrants			0
Other financing activities			0	0
Cash flows provided by (used in) financing activities			(39.5)	(65.1)
(Decrease) increase in cash and cash equivalents			(0.6)	(0.1)
Cash and cash equivalents at beginning of period			1.9	1.4
Cash and cash equivalents at end of period	1.3	1.3	1.3	1.3
Notes guaranteed by parent [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Revenue	164.4	222.3	344.9	440.8
Operating costs and expenses	152.0	206.0	325.4	391.9
Operating (loss) income	12.4	16.3	19.5	48.9
Interest expense (income), net	4.7	13.0	12.3	26.9
Other (income) expense, net	4.2	(0.9)	4.5	(0.1)
(Loss) income before equity in earnings of subsidiaries and income taxes	3.5	4.2	2.7	22.1
Income tax (benefit) expense	(1.3)	4.0	8.7	10.8
Equity in earnings of subsidiaries, net of tax	0	0	0	0
Net income (loss)	4.8	0.2	(6.0)	11.3
Other comprehensive income (loss)	0.1	0	(0.1)	0
Total comprehensive income (loss)	4.9	0.2	(6.1)	11.3
Preferred stock dividends	0	0	0	0
Net income (loss) applicable to common shareowners	4.8	0.2	(6.0)	11.3
Condensed Consolidating Balance Sheets
Cash and cash equivalents	0.9	2.4	0.9	2.4
Receivables, net	155.3		155.3		198.0
Other current assets	35.2		35.2		43.8
Total current assets	191.4		191.4		259.7
Property, plant and equipment, net	199.3		199.3		940.6
Investment in CyrusOne	489.3		489.3
Goodwill and intangibles, net	105.3		105.3		485.1
Investments in and advances to subsidiaries	0		0		0
Other noncurrent assets	188.5		188.5		266.3
Total assets	1,173.8		1,173.8		1,951.7
Current portion of long-term debt	3.3		3.3		10.4
Accounts payable	45.0		45.0		72.7
Other current liabilities	33.3		33.3		69.7
Total current liabilities	81.6		81.6		152.8
Long-term debt, less current portion	189.7		189.7		693.0
Other noncurrent liabilities	61.3		61.3		181.7
Intercompany payables	200.6		200.6		276.4
Total liabilities	533.2		533.2		1,303.9
Shareowners' (deficit) equity	640.6		640.6		647.8
Total liabilities and shareowners' equity (deficit)	1,173.8		1,173.8		1,951.7
Condensed Consolidating Statements of Cash Flows
Cash flows (used in) provided by operating activities			45.9	54.2
Capital expenditures			(26.6)	(119.7)
Dividends received from CyrusOne			7.0
Proceeds from sale of assets			0	0
Cash divested from deconsolidation of CyrusOne			(12.2)
Other investing activities			0.4	0
Cash flows used in investing activities			(31.4)	(119.7)
Funding between Parent and subsidiaries, net			(77.1)	52.7
Borrowings on revolving facilities, net			48.8	19.0
Repayment of debt			(3.2)	(6.4)
Common stock repurchase			0	0
Proceeds from exercise of options and warrants			0
Other financing activities			0	(0.1)
Cash flows provided by (used in) financing activities			(31.5)	65.2
(Decrease) increase in cash and cash equivalents			(17.0)	(0.3)
Cash and cash equivalents at beginning of period			17.9	2.7
Cash and cash equivalents at end of period	0.9	2.4	0.9	2.4
Notes guaranteed by parent [Member] | Consolidation, Eliminations [Member]
Condensed Consolidating Statements of Operations and Comprehensive (Loss) Income
Revenue	(14.0)	(15.4)	(28.1)	(31.0)
Operating costs and expenses	(14.0)	(15.4)	(28.1)	(31.0)
Operating (loss) income	0	0	0	0
Interest expense (income), net	0	0	0	0
Other (income) expense, net	0	0	0	0
(Loss) income before equity in earnings of subsidiaries and income taxes	0	0	0	0
Income tax (benefit) expense	0	0	0	0
Equity in earnings of subsidiaries, net of tax	(39.2)	(33.3)	(53.9)	(79.1)
Net income (loss)	(39.2)	(33.3)	(53.9)	(79.1)
Other comprehensive income (loss)	0	0	0	0
Total comprehensive income (loss)	(39.2)	(33.3)	(53.9)	(79.1)
Preferred stock dividends	0	0	0	0
Net income (loss) applicable to common shareowners	(39.2)	(33.3)	(53.9)	(79.1)
Condensed Consolidating Balance Sheets
Cash and cash equivalents	0	0	0	0
Receivables, net	0		0		0
Other current assets	(0.5)		(0.5)		(0.4)
Total current assets	(0.5)		(0.5)		(0.4)
Property, plant and equipment, net	0		0		0
Investment in CyrusOne	0		0
Goodwill and intangibles, net	0		0		0
Investments in and advances to subsidiaries	(1,685.2)		(1,685.2)		(1,678.1)
Other noncurrent assets	(148.3)		(148.3)		(163.1)
Total assets	(1,834.0)		(1,834.0)		(1,841.6)
Current portion of long-term debt	0		0		0
Accounts payable	0		0		0
Other current liabilities	0.7		0.7		0.9
Total current liabilities	0.7		0.7		0.9
Long-term debt, less current portion	0		0		0
Other noncurrent liabilities	(149.5)		(149.5)		(164.4)
Intercompany payables	(459.6)		(459.6)		(505.3)
Total liabilities	(608.4)		(608.4)		(668.8)
Shareowners' (deficit) equity	(1,225.6)		(1,225.6)		(1,172.8)
Total liabilities and shareowners' equity (deficit)	(1,834.0)		(1,834.0)		(1,841.6)
Condensed Consolidating Statements of Cash Flows
Cash flows (used in) provided by operating activities			0	0
Capital expenditures			0	0
Dividends received from CyrusOne			0
Proceeds from sale of assets			0	0
Cash divested from deconsolidation of CyrusOne			0
Other investing activities			0	0
Cash flows used in investing activities			0	0
Funding between Parent and subsidiaries, net			0	0
Borrowings on revolving facilities, net			0	0
Repayment of debt			0	0
Common stock repurchase			0	0
Proceeds from exercise of options and warrants			0
Other financing activities			0	0
Cash flows provided by (used in) financing activities			0	0
(Decrease) increase in cash and cash equivalents			0	0
Cash and cash equivalents at beginning of period			0	0
Cash and cash equivalents at end of period	$ 0	$ 0	$ 0	$ 0