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PREPAID AND OTHER CURRENT ASSETS (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
PREPAID AND OTHER CURRENT ASSETS    
Insurance $ 14.2 $ 10.1
Licensing, permits and tolls 4.9 5.4
Other assets 2.9 3.1
Other prepaids 1.9 1.7
Assets held for sale 4.9  
Highway and fuel taxes 0.7 1.6
Total $ 24.6 $ 21.9