GOVERNMENT GRANTS (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		1 Months Ended	3 Months Ended
	Mar. 31, 2014 item	Mar. 31, 2014 Letters of credit	Aug. 31, 2013 Mobility Funds	Mar. 31, 2014 Mobility Funds U.S. Wireless	Mar. 31, 2014 Mobility Funds U.S. Wireless Liability	Mar. 31, 2014 Mobility Funds U.S. Wireless Other current liabilities	Mar. 31, 2014 Mobility Funds U.S. Wireless Other long-term liabilities
GOVERNMENT GRANTS
Number of new funds created by FCC	2
Mobility Funds approved by FCC			$ 21.7
Period over which a portion of the Mobility Funds is used to offset the costs of supporting the networks	5 years
Letters of credit posted to USAC		9.9
Amount of letters of credit drawn		0
Mobility Funds received				7.3	6.3	2.5	3.8
Grant funds used to offset fixed asset related costs				$ 1.0