MATERIALS, SUPPLIES, AND INVENTORIES

6 Months Ended

Jun. 30, 2021

Inventory Disclosure [Abstract]

MATERIALS, SUPPLIES, AND INVENTORIES

MATERIALS, SUPPLIES, AND INVENTORIES

Our inventory consisted of:

(in millions)	June 30, 2021		December 31, 2020
Materials and supplies	$	46.5	$	45.8
Fossil fuel	25.1		28.0
Natural gas in storage	17.6		18.9
Total	$	89.2	$	92.7

Substantially all materials and supplies, fossil fuel inventories, and natural gas in storage are recorded using the weighted-average cost method of accounting.