Goodwill and Intangible Assets Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Years	Dec. 31, 2010	Dec. 31, 2009
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 19.1	$ 11.6	$ 4.1
Finite-Lived Intangible Assets, Set Renewal Period	10
Impairment of Intangible Assets, Finite-lived	0	0	0
Finite-Lived Intangible Assets, Gross	171.8	165.6
Finite-Lived Intangible Assets, Accumulated Amortization	(43.1)	(24.0)
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Future Amortization Expense, Year One	19.6
Future Amortization Expense, Year Two	19.6
Future Amortization Expense, Year Three	19.2
Future Amortization Expense, Year Four	16.3
Future Amortization Expense, Year Five	12.5
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	88.2	88.2
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	154.3	154.3
Finite-Lived Intangible Assets, Accumulated Amortization	(40.2)	(23.5)
Customer Relationships [Member] | Wireline [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Weighted-Average Useful Life	10
Finite-Lived Intangible Assets, Gross	7.0	7.0
Finite-Lived Intangible Assets, Accumulated Amortization	(4.2)	(3.4)
Customer Relationships [Member] | Wireless [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Weighted-Average Useful Life	9
Finite-Lived Intangible Assets, Gross	8.7	8.7
Finite-Lived Intangible Assets, Accumulated Amortization	(7.6)	(6.8)
Customer Relationships [Member] | Data Center Colocation [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Weighted-Average Useful Life	15
Finite-Lived Intangible Assets, Gross	136.6	136.6
Finite-Lived Intangible Assets, Accumulated Amortization	(26.4)	(11.4)
Customer Relationships [Member] | IT Services and Hardware [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Weighted-Average Useful Life	5
Finite-Lived Intangible Assets, Gross	2.0	2.0
Finite-Lived Intangible Assets, Accumulated Amortization	(2.0)	(1.9)
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	13.6	7.4
Finite-Lived Intangible Assets, Accumulated Amortization	(2.8)	(0.5)
Trademarks [Member] | Wireless [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Weighted-Average Useful Life	7
Finite-Lived Intangible Assets, Gross	6.2	0
Finite-Lived Intangible Assets, Accumulated Amortization	(1.5)	0
Trademarks [Member] | Data Center Colocation [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Weighted-Average Useful Life	15
Finite-Lived Intangible Assets, Gross	7.4	7.4
Finite-Lived Intangible Assets, Accumulated Amortization	(1.3)	(0.5)
Lease Agreements [Member] | Data Center Colocation [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Weighted-Average Useful Life	56
Finite-Lived Intangible Assets, Gross	3.9	3.9
Finite-Lived Intangible Assets, Accumulated Amortization	$ (0.1)	$ 0