ACQUISITIONS AND DISPOSITIONS (Scott-Rice Telephone Co.) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Feb. 23, 2018
Assets held for sale:
Property and equipment, net	$ 35.7
Liabilities associated with assets held for sale:
Deferred tax liability, net	5.1
Scott Rice Telephone Co. | Disposal Group, Not Discontinued Operations
Dispositions
Consideration		$ 42.0
Assets held for sale:
Property and equipment, net	35.7
Goodwill	5.2
Other assets	0.9
Total assets held for sale	41.8
Liabilities associated with assets held for sale:
Deferred tax liability, net	5.1
Other liabilities	1.0
Total liabilities associated with assets held for sale	$ 6.1