LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Financing arrangements - Letters of credit & Surety bonds (Details) $ in Millions	Jun. 30, 2018 USD ($)
Accounts receivable securitization program
Financing Arrangements
Outstanding letters of credit	$ 17.7
Letter of Credit Agreements
Financing Arrangements
Outstanding letters of credit	18.3
Surety bonds
Financing Arrangements
Outstanding surety bonds under uncollateralized bond programs	$ 53.1