Investment In Cellular Partnership (Schedule Of Equity In Earnings Of Equity Method Investees) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Earnings from Cellular Partnerships, net	$ 0	$ 20.2	$ 47.2
Transaction costs related to the sale of Convergys' interest in Cellular Partnerships	0	(1.2)	0
Gain on sale of interests in the Cellular Partnerships	0	(265.0)	0
Total earnings from Cellular Partnerships, net	0	285.2	47.2
Cincinnati SMSA Limited Partnership [Member]
Earnings from Cellular Partnerships, net	0	20.5	46.1
Cincinnati SMSA Tower Holdings LLC [Member]
Earnings from Cellular Partnerships, net	$ 0	$ 0.9	$ 1.1

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. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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