GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule Of Finite-Lived Intangible Assets By Major Class

Following is a summary of the definite-lived intangible assets as of December 31, 2017 and 2016:

		(In Millions)
		December 31, 2017							December 31, 2016
	Classification	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Permits	Other non-current assets	$	78.8	$	(26.5	)	$	52.3	$	78.4	$	(24.6	)	$	53.8