GOVERNMENT GRANTS (Details 2) (USD $) In Millions, unless otherwise specified	9 Months Ended		1 Months Ended	9 Months Ended				1 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 Letter of credit sub-facility	Aug. 31, 2013 Mobility Funds	Sep. 30, 2014 Mobility Funds U.S. Wireless	Sep. 30, 2014 Mobility Funds U.S. Wireless Liability	Sep. 30, 2014 Mobility Funds U.S. Wireless Other current liabilities	Sep. 30, 2014 Mobility Funds U.S. Wireless Other long-term liabilities	Jun. 30, 2014 Tribal Mobility Fund
MOBILITY FUND GRANTS
Mobility Funds approved by FCC			$ 21.7					$ 2.4
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		10.5
Amount of letters of credit drawn		0
Mobility Funds received				7.4	6.1	2.3	3.8
Grant funds used to offset fixed asset related costs				$ 1.3