Common Shareholders' Equity, Equity Repurchase (Details) (US Cellular Common Shares, U.S. Cellular, USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
US Cellular Common Shares | U.S. Cellular
Share repurchases
Number of shares acquired	496,000
Average cost per share	$ 37.16
Amount	$ 18,425
Common share repurchase authorization	On November 17, 2009, the Board of Directors of U.S. Cellular authorized the repurchase of up to 1,300,000 Common Shares on an annual basis beginning in 2009 and continuing each year thereafter, on a cumulative basis. These purchases will be made pursuant to open market purchases, block purchases, private purchases, or otherwise, depending on market prices and other conditions. This authorization does not have an expiration date.
The increase in number of shares allowed to be repurchased	1,300,000
Repurchase expiration	does not have an expiration date