Business Segment Information (Details) (USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Segment Reporting Information [Line Items]
Revenue, Net	$ 368.8	$ 351.9	$ 1,097.1	$ 1,014.2
Intersegment Revenue	8.0	8.7	24.4	26.3
Operating Income (Loss)	86.3	82.6	250.3	234.8
Expenditures for long-lived assets	74.5	43.0	167.0	627.9
Depreciation and amortization	49.1	48.2	146.3	129.7
Assets	2,683.8		2,683.8		2,653.6
Cyrus Networks [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	5.5		18.0
Wireline [Member]
Segment Reporting Information [Line Items]
Revenue, Net	182.7	185.2	551.8	559.6
Intersegment Revenue	5.8	5.9	17.4	18.4
Operating Income (Loss)	65.2	58.9	180.2	181.0
Expenditures for long-lived assets	27.1	24.3	75.2	67.4
Depreciation and amortization	25.6	26.3	76.1	77.2
Assets	701.1		701.1		694.1
Corporate Elimination [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	(5.8)	(4.8)	(17.8)	(23.7)
Depreciation and amortization	0.1	0.1	0.3	0.3
Assets	678.2		678.2		708.3
Wireless [Member]
Segment Reporting Information [Line Items]
Revenue, Net	68.1	72.8	209.2	219.7
Intersegment Revenue	0.6	0.7	1.7	2.1
Operating Income (Loss)	11.6	15.7	43.1	52.2
Expenditures for long-lived assets	4.9	1.1	10.6	5.5
Depreciation and amortization	8.0	8.1	25.1	25.4
Assets	347.2		347.2		359.3
Data Center Colocation [Member]
Segment Reporting Information [Line Items]
Revenue, Net	47.1	40.0	135.6	84.7
Intersegment Revenue	0.5	0.4	1.6	1.3
Operating Income (Loss)	11.3	11.0	36.1	25.0
Expenditures for long-lived assets	41.0	16.2	77.2	548.4
Depreciation and amortization	13.2	11.8	38.2	21.6
Assets	919.9		919.9		857.2
IT Services and Hardware [Member]
Segment Reporting Information [Line Items]
Revenue, Net	78.9	62.6	224.9	176.5
Intersegment Revenue	1.1	1.7	3.7	4.5
Operating Income (Loss)	4.0	1.8	8.7	0.3
Expenditures for long-lived assets	1.5	1.4	4.0	6.6
Depreciation and amortization	2.2	1.9	6.6	5.2
Assets	37.4		37.4		34.7
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Revenue, Net	$ (8.0)	$ (8.7)	$ (24.4)	$ (26.3)

Total expenditures for additions to long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets of the reportable segment; if the amount: (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets.

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