Quarterly Financial Information (Unaudited) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Selected Quarterly Financial Information [Abstract]
Revenue, Net	$ 365.3	$ 368.8	$ 367.5	$ 360.8	$ 362.8	$ 351.9	$ 338.6	$ 323.7	$ 1,462.4	$ 1,377.0	$ 1,336.0
Operating Income (Loss)	9.2	86.3	77.6	86.4	64.5	82.6	69.8	82.4	259.5	299.3	295.5
Net income	(30.4)	17.6	13.5	17.9	(18.6)	14.5	9.6	22.8	18.6	28.3	89.6
Basic earnings per common share	$ (0.17)	$ 0.08	$ 0.06	$ 0.08	$ (0.11)	$ 0.06	$ 0.03	$ 0.10	$ 0.04	$ 0.09	$ 0.37
Earnings Per Share, Diluted	$ (0.17)	$ 0.07	$ 0.05	$ 0.08	$ (0.11)	$ 0.06	$ 0.03	$ 0.10	$ 0.04	$ 0.09	$ 0.37
Wireless [Member]
Selected Quarterly Financial Information [Abstract]
Revenue, Net									277.6	289.2	307.0
Operating Income (Loss)									3.3	56.3	33.0
Tranche B Term Loan [Member]
Selected Quarterly Financial Information [Abstract]
Extinguishment of Debt, Amount										$ 760.0