Investment In Cellular Partnership (Schedule Of Net Income Of Cincinnati SMSA Limited Partnership) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenues	$ 576.9	$ 556.0	$ 1,673.1	$ 1,630.2
Income from operations	43.5	34.7	118.6	64.6
Net income	213.7	28.8	280.3	91.5
Cincinnati SMSA Limited Partnership [Member]
Revenues	0	171.4	359.8	484.7
Income from operations	0	35.0	61.2	109.4
Net income	$ 0	$ 34.2	$ 60.8	$ 106.4