MATERIALS, SUPPLIES, AND INVENTORIES (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Schedule of Inventory

Our inventory consisted of:

(in millions)	March 31, 2019		December 31, 2018
Materials and supplies	$	230.7	$	226.6
Fossil fuel	60.4		88.7
Natural gas in storage	39.0		232.9
Total	$	330.1	$	548.2