Debt Debt - Schedule of Debt (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Jan. 24, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Current portion of long-term debt	$ 7.2		$ 13.4
Corporate Credit Agreement, Amount Outstanding	8.0		0
Receivables facility amount outstanding	100.8		52.0
Long-term debt, less current portion	2,183.0		2,676.0
Net unamortized discount	(6.7)		(7.5)
Total debt	2,190.2		2,689.4
Capital lease obligations and other debt [Member]
Debt Instrument [Line Items]
Current portion of long-term debt	7.2		13.4
Long-term debt, less current portion	97.5		123.1
8 1/4% Senior Notes due 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	500.0		500.0
Debt Instrument, Interest Rate, Stated Percentage	8.25%
8 3/4% Senior Subordinated Notes due 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	625.0		625.0
Debt Instrument, Interest Rate, Stated Percentage	8.75%
8 3/8% Senior Notes due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	683.9		683.9
Debt Instrument, Interest Rate, Stated Percentage	8.375%
CyrusOne 6 3/8% Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	0	525.0	525.0
Debt Instrument, Interest Rate, Stated Percentage		6.375%
7 1/4% Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	40.0		40.0
Debt Instrument, Interest Rate, Stated Percentage	7.25%
Various Cincinnati Bell Telephone notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	134.5		134.5
Long-term debt, less current portion, before deducting unamortized discount or premium [Member]
Debt Instrument [Line Items]
Long-term debt, less current portion	$ 2,189.7		$ 2,683.5