XML 58 R25.htm IDEA: XBRL DOCUMENT v3.21.1
Derivative Financial Instruments (Tables)
 3 Months Ended
Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Open Gross Derivative Volumes By Commodity Type
The following table presents open gross commodity contract volumes by commodity type for derivative assets and liabilities as of March 31, 2021, and December 31, 2020. As of March 31, 2021, these contracts extended through October 2023, October 2026, and May 2032 for fuel oils, natural gas and power, respectively.
Quantity (in millions, except as indicated)
March 31, 2021December 31, 2020
CommodityAmeren MissouriAmeren IllinoisAmerenAmeren MissouriAmeren IllinoisAmeren
Fuel oils (in gallons)36 — 36 43 — 43 
Natural gas (in mmbtu)34 114 148 33 114 147 
Power (in MWhs)7 7 14 6 7 13 
Derivative Instruments Carrying Value
The following table presents the carrying value and balance sheet location of all derivative commodity contracts, none of which were designated as hedging instruments, as of March 31, 2021, and December 31, 2020:
March 31, 2021December 31, 2020
Balance Sheet LocationAmeren
Missouri		Ameren
Illinois		AmerenAmeren
Missouri		Ameren
Illinois		Ameren
Fuel oilsOther current assets$2 $— $2 $2 $— $2 
Other assets3 — 3 — — — 
Natural gasOther current assets2 10 12 1 8 9 
Other assets2 4 6 2 2 4 
PowerOther current assets4 — 4 7 — 7 
Other assets1 — 1 — — — 
Total assets$14 $14 $28 $12 $10 $22 
Fuel oilsOther current liabilities$3 $— $3 $7 $— $7 
Other deferred credits and liabilities— — — 2 — 2 
Natural gasOther current liabilities— — — 1 1 2 
Other deferred credits and liabilities— — — — 1 1 
PowerOther current liabilities9 16 25 3 17 20 
Other deferred credits and liabilities5 169 174 8 181 189 
Total liabilities$17 $185 $202 $21 $200 $221