XML 66 R27.htm IDEA: XBRL DOCUMENT
v3.22.2

Related Party Transactions (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2022
Related Party Transactions [Abstract] |
Schedule of Affiliate Receivables and Payables | The following table presents the affiliate balances related to income taxes for Ameren Missouri and Ameren Illinois as of June 30, 2022, and December 31, 2021:
| June 30, 2022 |  |  | December 31, 2021
| Ameren Missouri | Ameren Illinois |  |  | Ameren Missouri | Ameren Illinois
Income taxes payable to parent(a) | $ | — |  | $ | 82 |  |  |  | $ | — |  | $ | 8 |
Income taxes receivable from parent(b) | 45 |  | — |  |  |  | 27 |  | 18 |
(a)Included in “Accounts payable – affiliates” on the balance sheet. (b)Included in “Accounts receivable – affiliates” on the balance sheet.
Schedule of Related Party Transactions | The following table presents the impact on Ameren Missouri and Ameren Illinois of related-party transactions for the three and six months ended June 30, 2022 and 2021:
|  |  |  | Three Months |  | Six Months
Agreement | Income Statement Line Item |  |  | Ameren Missouri |  | Ameren Illinois |  | Ameren Missouri |  | Ameren Illinois
Ameren Missouri power supply | Operating Revenues | 2022 | $ | 1 |  | $ | (a) | $ | 5 |  | $ | (a)
agreements with Ameren Illinois |  | 2021 |  | 3 |  |  | (a) |  | 5 |  |  | (a)
Ameren Missouri and Ameren Illinois | Operating Revenues | 2022 | $ | 6 |  | $ | (b) | $ | 12 |  | $ | (b)
rent and facility services |  | 2021 |  | 7 |  |  | (b) |  | 14 |  |  | (b)
Ameren Missouri and Ameren Illinois miscellaneous | Operating Revenues | 2022 | $ | (b) | $ | (b) | $ | (b) | $ | 1 |
support services and other services provided to ATXI |  | 2021 |  | (b) |  | 2 |  |  | (b) |  | 2 |
Total Operating Revenues |  | 2022 | $ | 7 |  | $ | (b) | $ | 17 |  | $ | 1 |
|  | 2021 |  | 10 |  |  | 2 |  |  | 19 |  |  | 2 |
Ameren Illinois power supply | Purchased Power | 2022 | $ | (a) | $ | 1 |  | $ | (a) | $ | 5 |
agreements with Ameren Missouri |  | 2021 |  | (a) |  | 3 |  |  | (a) |  | 5 |
Ameren Missouri and Ameren Illinois | Purchased Power | 2022 | $ | (b) | $ | (b) | $ | (b) | $ | (b)
transmission services from ATXI |  | 2021 |  | 1 |  |  | 1 |  |  | 2 |  |  | 1 |
Total Purchased Power |  | 2022 | $ | (b) | $ | 1 |  | $ | (b) | $ | 5 |
|  | 2021 |  | 1 |  |  | 4 |  |  | 2 |  |  | 6 |
Ameren Missouri and Ameren Illinois | Other Operations and Maintenance | 2022 | $ | (b) | $ | (b) | $ | (b) | $ | 1 |
rent and facility services |  | 2021 |  | (b) |  | 1 |  |  | (b) |  | 2 |
Ameren Services support services | Other Operations and Maintenance | 2022 | $ | 33 |  | $ | 32 |  | $ | 71 |  | $ | 67 |
agreement |  | 2021 |  | 34 |  |  | 31 |  |  | 69 |  |  | 64 |
Total Other Operations and |  | 2022 | $ | 33 |  | $ | 32 |  | $ | 71 |  | $ | 68 |
Maintenance |  | 2021 |  | 34 |  |  | 32 |  |  | 69 |  |  | 66 |
Money pool borrowings (advances) | (Interest Charges)/Other Income, Net | 2022 | $ | (b) | $ | (b) | $ | (b) | $ | (b)
|  | 2021 |  | (b) |  | (b) |  | (b) |  | (b)
(a)Not applicable. (b)Amount less than $1 million.

X
- Definition [Table Text Block] for Schedule of Affiliate Receivables and Payables + References No definition available. + Details
Name: | aee_ScheduleofAffiliateReceivablesandPayablesTableTextBlock
Namespace Prefix: | aee_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration