MATERIALS, SUPPLIES, AND INVENTORIES

9 Months Ended

Sep. 30, 2020

Inventory Disclosure [Abstract]

MATERIALS, SUPPLIES, AND INVENTORIES

MATERIALS, SUPPLIES, AND INVENTORIES

Our inventory consisted of:

(in millions)	September 30, 2020		December 31, 2019
Materials and supplies	$	57.9	$	50.1
Fossil fuel	26.4		36.1
Natural gas in storage	21.4		20.2
Total	$	105.7	$	106.4

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