Supplemental Guarantor Information - Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Abstract]
Revenue	$ 299.2	$ 285.8	$ 588.1	$ 578.7
Operating costs and expenses	271.8	256.1	531.1	511.9
Operating income (loss)	27.4	29.7	57.0	66.8
Interest expense (income), net	19.9	28.0	40.2	60.7
Other expense (income), net	(1.1)	1.3	(1.1)	4.8
Income (loss) before equity in earnings of subsidiaries and income taxes	122.0	282.1	133.7	283.0
Income tax expense (benefit)	44.4	101.4	49.1	102.0
Income (loss) from continuing operations	77.6	180.7	84.6	181.0
Income (loss) from discontinued operations, net of tax	0.0	10.9	0.0	59.8
Net income	77.6	191.6	84.6	240.8
Total comprehensive income (loss)	79.1	197.6	87.6	248.2
Preferred stock dividends	2.6	2.6	5.2	5.2
Net income (loss) applicable to common shareowners	75.0	189.0	79.4	235.6
Notes guaranteed by parent [Member]
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Abstract]
Revenue	299.2	285.8	588.1	578.7
Operating costs and expenses	271.8	256.1	531.1	511.9
Operating income (loss)	27.4	29.7	57.0	66.8
Interest expense (income), net	19.9	28.0	40.2	60.7
Other expense (income), net	(114.5)	(280.4)	(116.9)	(276.9)
Income (loss) before equity in earnings of subsidiaries and income taxes	122.0	282.1	133.7	283.0
Income tax expense (benefit)	44.4	101.4	49.1	102.0
Equity in earnings of subsidiaries, net of tax	0.0	0.0	0.0	0.0
Income (loss) from continuing operations		180.7		181.0
Income (loss) from discontinued operations, net of tax		10.9		59.8
Net income	77.6	191.6	84.6	240.8
Other comprehensive income (loss)	1.5	6.0	3.0	7.4
Total comprehensive income (loss)	79.1	197.6	87.6	248.2
Preferred stock dividends	2.6	2.6	5.2	5.2
Net income (loss) applicable to common shareowners	75.0	189.0	79.4	235.6
Notes guaranteed by parent [Member] \| Consolidation, Eliminations [Member]
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Abstract]
Revenue	(9.8)	(9.7)	(20.2)	(19.4)
Operating costs and expenses	(9.8)	(9.7)	(20.2)	(19.4)
Operating income (loss)	0.0	0.0	0.0	0.0
Interest expense (income), net	0.0	0.0	0.0	0.0
Other expense (income), net	0.0	0.0	0.0	0.0
Income (loss) before equity in earnings of subsidiaries and income taxes	0.0	0.0	0.0	0.0
Income tax expense (benefit)	0.0	0.0	0.0	0.0
Equity in earnings of subsidiaries, net of tax	(100.4)	(223.9)	(126.4)	(297.8)
Income (loss) from continuing operations		(223.9)		(297.8)
Income (loss) from discontinued operations, net of tax		0.0		0.0
Net income	(100.4)	(223.9)	(126.4)	(297.8)
Other comprehensive income (loss)	0.0	0.0	0.0	0.0
Total comprehensive income (loss)	(100.4)	(223.9)	(126.4)	(297.8)
Preferred stock dividends	0.0	0.0	0.0	0.0
Net income (loss) applicable to common shareowners	(100.4)	(223.9)	(126.4)	(297.8)
Notes guaranteed by parent [Member] \| Parent Company [Member]
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Abstract]
Revenue	0.0	0.0	0.0	0.0
Operating costs and expenses	6.9	6.4	12.1	11.7
Operating income (loss)	(6.9)	(6.4)	(12.1)	(11.7)
Interest expense (income), net	23.3	28.4	47.4	62.3
Other expense (income), net	5.0	13.1	4.7	12.7
Income (loss) before equity in earnings of subsidiaries and income taxes	(35.2)	(47.9)	(64.2)	(86.7)
Income tax expense (benefit)	(12.4)	(15.6)	(22.4)	(29.7)
Equity in earnings of subsidiaries, net of tax	100.4	223.9	126.4	297.8
Income (loss) from continuing operations		191.6		240.8
Income (loss) from discontinued operations, net of tax		0.0		0.0
Net income	77.6	191.6	84.6	240.8
Other comprehensive income (loss)	1.5	5.8	3.1	7.5
Total comprehensive income (loss)	79.1	197.4	87.7	248.3
Preferred stock dividends	2.6	2.6	5.2	5.2
Net income (loss) applicable to common shareowners	75.0	189.0	79.4	235.6
Notes guaranteed by parent [Member] \| Cincinnati Bell Telephone Company [Member]
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Abstract]
Revenue	170.1	161.5	337.8	329.1
Operating costs and expenses	144.0	133.7	286.1	262.6
Operating income (loss)	26.1	27.8	51.7	66.5
Interest expense (income), net	1.3	(0.3)	2.1	(1.1)
Other expense (income), net	1.7	1.6	1.5	3.5
Income (loss) before equity in earnings of subsidiaries and income taxes	23.1	26.5	48.1	64.1
Income tax expense (benefit)	8.3	9.4	17.2	23.2
Equity in earnings of subsidiaries, net of tax	0.0	0.0	0.0	0.0
Income (loss) from continuing operations		17.1		40.9
Income (loss) from discontinued operations, net of tax		0.0		0.0
Net income	14.8	17.1	30.9	40.9
Other comprehensive income (loss)	0.0	0.0	0.0	0.0
Total comprehensive income (loss)	14.8	17.1	30.9	40.9
Preferred stock dividends	0.0	0.0	0.0	0.0
Net income (loss) applicable to common shareowners	14.8	17.1	30.9	40.9
Notes guaranteed by parent [Member] \| Non-Guarantor Subsidiaries [Member]
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Abstract]
Revenue	138.9	134.0	270.5	269.0
Operating costs and expenses	130.7	125.7	253.1	257.0
Operating income (loss)	8.2	8.3	17.4	12.0
Interest expense (income), net	(4.7)	(0.1)	(9.3)	(0.5)
Other expense (income), net	(121.2)	(295.1)	(123.1)	(293.1)
Income (loss) before equity in earnings of subsidiaries and income taxes	134.1	303.5	149.8	305.6
Income tax expense (benefit)	48.5	107.6	54.3	108.5
Equity in earnings of subsidiaries, net of tax	0.0	0.0	0.0	0.0
Income (loss) from continuing operations		195.9		197.1
Income (loss) from discontinued operations, net of tax		10.9		59.8
Net income	85.6	206.8	95.5	256.9
Other comprehensive income (loss)	0.0	0.2	(0.1)	(0.1)
Total comprehensive income (loss)	85.6	207.0	95.4	256.8
Preferred stock dividends	0.0	0.0	0.0	0.0
Net income (loss) applicable to common shareowners	85.6	206.8	95.5	256.9
Notes guaranteed by subsidiaries [Member]
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Abstract]
Revenue	299.2	285.8	588.1	578.7
Operating costs and expenses	271.8	256.1	531.1	511.9
Operating income (loss)	27.4	29.7	57.0	66.8
Interest expense (income), net	19.9	28.0	40.2	60.7
Other expense (income), net	(114.5)	(280.4)	(116.9)	(276.9)
Income (loss) before equity in earnings of subsidiaries and income taxes	122.0	282.1	133.7	283.0
Income tax expense (benefit)	44.4	101.4	49.1	102.0
Equity in earnings of subsidiaries, net of tax	0.0	0.0	0.0	0.0
Income (loss) from continuing operations		180.7		181.0
Income (loss) from discontinued operations, net of tax		10.9		59.8
Net income	77.6	191.6	84.6	240.8
Other comprehensive income (loss)	1.5	6.0	3.0	7.4
Total comprehensive income (loss)	79.1	197.6	87.6	248.2
Preferred stock dividends	2.6	2.6	5.2	5.2
Net income (loss) applicable to common shareowners	75.0	189.0	79.4	235.6
Notes guaranteed by subsidiaries [Member] \| Consolidation, Eliminations [Member]
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Abstract]
Revenue	(9.8)	(9.7)	(20.2)	(19.4)
Operating costs and expenses	(9.8)	(9.7)	(20.2)	(19.4)
Operating income (loss)	0.0	0.0	0.0	0.0
Interest expense (income), net	0.0	0.0	0.0	0.0
Other expense (income), net	0.0	0.0	0.0	0.0
Income (loss) before equity in earnings of subsidiaries and income taxes	0.0	0.0	0.0	0.0
Income tax expense (benefit)	0.0	0.0	0.0	0.0
Equity in earnings of subsidiaries, net of tax	(100.4)	(223.9)	(126.4)	(297.8)
Income (loss) from continuing operations		(223.9)		(297.8)
Income (loss) from discontinued operations, net of tax		0.0		0.0
Net income	(100.4)	(223.9)	(126.4)	(297.8)
Other comprehensive income (loss)	0.0	0.0	0.0	0.0
Total comprehensive income (loss)	(100.4)	(223.9)	(126.4)	(297.8)
Preferred stock dividends	0.0	0.0	0.0	0.0
Net income (loss) applicable to common shareowners	(100.4)	(223.9)	(126.4)	(297.8)
Notes guaranteed by subsidiaries [Member] \| Parent Company [Member]
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Abstract]
Revenue	0.0	0.0	0.0	0.0
Operating costs and expenses	6.9	6.4	12.1	11.7
Operating income (loss)	(6.9)	(6.4)	(12.1)	(11.7)
Interest expense (income), net	23.3	28.4	47.4	62.3
Other expense (income), net	5.0	13.1	4.7	12.7
Income (loss) before equity in earnings of subsidiaries and income taxes	(35.2)	(47.9)	(64.2)	(86.7)
Income tax expense (benefit)	(12.4)	(15.6)	(22.4)	(29.7)
Equity in earnings of subsidiaries, net of tax	100.4	223.9	126.4	297.8
Income (loss) from continuing operations		191.6		240.8
Income (loss) from discontinued operations, net of tax		0.0		0.0
Net income	77.6	191.6	84.6	240.8
Other comprehensive income (loss)	1.5	5.8	3.1	7.5
Total comprehensive income (loss)	79.1	197.4	87.7	248.3
Preferred stock dividends	2.6	2.6	5.2	5.2
Net income (loss) applicable to common shareowners	75.0	189.0	79.4	235.6
Notes guaranteed by subsidiaries [Member] \| Guarantor Subsidiaries [Member]
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Abstract]
Revenue	161.7	150.7	315.4	303.6
Operating costs and expenses	144.3	141.8	281.2	289.1
Operating income (loss)	17.4	8.9	34.2	14.5
Interest expense (income), net	(5.1)	(0.3)	(10.1)	(1.0)
Other expense (income), net	(116.1)	(290.9)	(113.2)	(284.8)
Income (loss) before equity in earnings of subsidiaries and income taxes	138.6	300.1	157.5	300.3
Income tax expense (benefit)	50.1	106.4	57.1	106.4
Equity in earnings of subsidiaries, net of tax	0.0	0.0	0.0	0.0
Income (loss) from continuing operations		193.7		193.9
Income (loss) from discontinued operations, net of tax		10.9		59.8
Net income	88.5	204.6	100.4	253.7
Other comprehensive income (loss)	0.0	0.0	0.0	0.0
Total comprehensive income (loss)	88.5	204.6	100.4	253.7
Preferred stock dividends	0.0	0.0	0.0	0.0
Net income (loss) applicable to common shareowners	88.5	204.6	100.4	253.7
Notes guaranteed by subsidiaries [Member] \| Non-Guarantor Subsidiaries [Member]
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Abstract]
Revenue	147.3	144.8	292.9	294.5
Operating costs and expenses	130.4	117.6	258.0	230.5
Operating income (loss)	16.9	27.2	34.9	64.0
Interest expense (income), net	1.7	(0.1)	2.9	(0.6)
Other expense (income), net	(3.4)	(2.6)	(8.4)	(4.8)
Income (loss) before equity in earnings of subsidiaries and income taxes	18.6	29.9	40.4	69.4
Income tax expense (benefit)	6.7	10.6	14.4	25.3
Equity in earnings of subsidiaries, net of tax	0.0	0.0	0.0	0.0
Income (loss) from continuing operations		19.3		44.1
Income (loss) from discontinued operations, net of tax		0.0		0.0
Net income	11.9	19.3	26.0	44.1
Other comprehensive income (loss)	0.0	0.2	(0.1)	(0.1)
Total comprehensive income (loss)	11.9	19.5	25.9	44.0
Preferred stock dividends	0.0	0.0	0.0	0.0
Net income (loss) applicable to common shareowners	$ 11.9	$ 19.3	$ 26.0	$ 44.1

Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) [Abstract]

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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