Annual report pursuant to Section 13 and 15(d)

CASH FLOW INFORMATION (Cash Paid for Income Taxes) (Details)

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CASH FLOW INFORMATION (Cash Paid for Income Taxes) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Supplemental Cash Flow Information [Abstract]      
Income Taxes Paid $ 1.7 $ 6.0 $ 5.0
Proceeds from Income Tax Refunds (7.8) (5.4) (211.4)
Interest Paid $ 139.0 $ 184.0 $ 185.6