INVENTORIES (Tables)

6 Months Ended

Jun. 30, 2015

Inventory Disclosure [Abstract]

Schedule of LIFO liquidation balance sheet amount

The amounts were as follows at June 30, 2015:

		June 30, 2015
(Millions)	Balance Sheet Presentation	PGL		NSG
Temporary LIFO liquidation debit	Other current assets	$	21.0	$	—
Temporary LIFO liquidation credit	Other current liabilities	—		5.2