Investment In Cellular Partnership (Schedule Of Equity In Earnings Of Equity Method Investees) (Details) (USD $) In Millions	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Earnings from Cellular Partnerships, net	$ 10.0	$ 11.7	$ 20.2	$ 25.0
Transaction costs related to the sale of Convergys' interest in Cellular Partnerships	(1.2)		(1.2)
Cincinnati SMSA Limited Partnership [Member]
Earnings from Cellular Partnerships, net	10.6	11.4	20.5	24.5
Cincinnati SMSA Tower Holdings LLC [Member]
Earnings from Cellular Partnerships, net	$ 0.6	$ 0.3	$ 0.9	$ 0.5

- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment.

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