XML 57 R28.htm IDEA: XBRL DOCUMENT
v3.25.1

Derivative Financial Instruments (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2025
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, 2025, and December 31, 2024. As of March 31, 2025, these contracts extended through October 2028, October 2030 and May 2032 for fuel oils, natural gas, and power, respectively.
| Quantity (in millions, except as indicated)
| March 31, 2025 | December 31, 2024
Commodity | Ameren Missouri | Ameren Illinois | Ameren | Ameren Missouri | Ameren Illinois | Ameren
Fuel oils (in gallons) | 24 |  | — |  | 24 |  | 23 |  | — |  | 23 |
Natural gas (in mmbtu) | 47 |  | 221 |  | 268 |  | 45 |  | 213 |  | 258 |
Power (in MWhs) | — |  | 4 |  | 4 |  | — |  | 4 |  | 4 |
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 because all qualify for regulatory deferral, as of March 31, 2025, and December 31, 2024:
|  |  | March 31, 2025 | December 31, 2024
| Balance Sheet Location |  | Ameren Missouri |  |  | Ameren Illinois |  |  | Ameren |  |  |  | Ameren Missouri |  |  | Ameren Illinois |  |  | Ameren
Natural gas | Other current assets |  | 4 |  |  |  | 11 |  |  |  | 15 |  |  |  |  | 2 |  |  |  | 2 |  |  |  | 4 |
| Other assets |  | 2 |  |  |  | 5 |  |  |  | 7 |  |  |  |  | 2 |  |  |  | 4 |  |  |  | 6 |
Power | Other current assets |  | 5 |  |  |  | — |  |  |  | 5 |  |  |  |  | 6 |  |  |  | — |  |  |  | 6 |
| Total assets |  | $ | 11 |  |  |  | $ | 16 |  |  |  | $ | 27 |  |  |  |  | $ | 10 |  |  |  | $ | 6 |  |  |  | $ | 16 |
Fuel oils | Other current liabilities |  | $ | 2 |  |  |  | $ | — |  |  |  | $ | 2 |  |  |  |  | $ | 2 |  |  |  | $ | — |  |  |  | $ | 2 |
| Other deferred credits and liabilities |  | 1 |  |  |  | — |  |  |  | 1 |  |  |  |  | 2 |  |  |  | — |  |  |  | 2 |
Natural gas | Other current liabilities |  | 2 |  |  |  | 6 |  |  |  | 8 |  |  |  |  | 5 |  |  |  | 22 |  |  |  | 27 |
| Other deferred credits and liabilities |  | 7 |  |  |  | 14 |  |  |  | 21 |  |  |  |  | 6 |  |  |  | 13 |  |  |  | 19 |
Power | Other current liabilities |  | — |  |  |  | 7 |  |  |  | 7 |  |  |  |  | — |  |  |  | 10 |  |  |  | 10 |
| Other deferred credits and liabilities |  | — |  |  |  | 60 |  |  |  | 60 |  |  |  |  | — |  |  |  | 43 |  |  |  | 43 |
| Total liabilities |  | $ | 12 |  |  |  | $ | 87 |  |  |  | $ | 99 |  |  |  |  | $ | 15 |  |  |  | $ | 88 |  |  |  | $ | 103 |

X
- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B + Details
Name: | us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
Name: | us-gaap_ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration