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Short-Term Debt and Liquidity (Tables) | 6 Months Ended
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Jun. 30, 2022
Debt Disclosure [Abstract] |
Schedule of Short-term Debt | The following table presents commercial paper outstanding, net of issuance discounts, as of June 30, 2022, and December 31, 2021. There were no borrowings outstanding under the Credit Agreements as of June 30, 2022, or December 31, 2021.
| June 30, 2022 |  |  | December 31, 2021
Ameren (parent) | $ | 595 |  |  |  | $ | 277 |
Ameren Missouri | 285 |  |  |  | 165 |
Ameren Illinois | 141 |  |  |  | 103 |
Ameren consolidated | $ | 1,021 |  |  |  | $ | 545 |
The following table summarizes the activity and relevant interest rates for Ameren (parent)’s, Ameren Missouri’s, and Ameren Illinois’ commercial paper issuances and borrowings under the Credit Agreements in the aggregate for the six months ended June 30, 2022 and 2021:
|  | Ameren (parent) |  | Ameren Missouri |  | Ameren Illinois |  | Ameren Consolidated |
2022 |  |  |  |  |  |  |  |  |
Average daily amount outstanding |  | $ | 374 |  |  | $ | 271 |  |  | $ | 57 |  |  | $ | 702 |  |
Weighted-average interest rate |  | 0.87 | % |  | 0.65 | % |  | 0.47 | % |  | 0.75 | % |
Peak amount outstanding during period(a) |  | $ | 595 |  |  | $ | 539 |  |  | $ | 142 |  |  | $ | 1,101 |  |
Peak interest rate |  | 2.05 | % |  | 2.05 | % |  | 2.05 | % |  | 2.05 | % |
2021 |  |  |  |  |  |  |  |  |
Average daily amount outstanding |  | $ | 388 |  |  | $ | 183 |  |  | $ | 211 |  |  | $ | 782 |  |
Weighted-average interest rate |  | 0.24 | % |  | 0.22 | % |  | 0.22 | % |  | 0.23 | % |
Peak amount outstanding during period(a) |  | $ | 650 |  |  | $ | 546 |  |  | $ | 485 |  |  | $ | 1,134 |  |
Peak interest rate |  | 0.33 | % |  | 0.25 | % |  | 0.25 | % |  | 0.33 | % |
(a)The timing of peak outstanding commercial paper issuances and borrowings under the Credit Agreements varies by company. Therefore, the sum of individual company peak amounts may not equal the Ameren consolidated peak for the period.

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- Definition Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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