High Prairie Renewable Energy Center purchase price

[Table of Co](#i2c056a9f8317485ea6601862f5b0559f_7)[ntents](#i2c056a9f8317485ea6601862f5b0559f_7)Property, Plant, and EquipmentIn January 2021, Ameren Missouri acquired a 300-MW wind generation project located in northwestern Missouri. As of June 30, 2021, Ameren Missouri had placed the project in service as the Atchison Renewable Energy Center. The purchase price of the energy center was approximately $500 million, including an immaterial amount of transaction costs. In December 2020, Ameren Missouri acquired a 400-MW wind generation project located in northeastern Missouri for approximately $615 million, and placed the assets in service as the High Prairie Renewable Energy Center. The purchase price included $564 million of cash, a deferred purchase price obligation withheld as credit support in relation to certain potential claims, contingent consideration, and transaction costs. Both renewable energy centers support Ameren Missouri’s compliance with the Missouri renewable energy standard.Asset Retirement ObligationsThe following table provides a reconciliation of the beginning and ending carrying amount of AROs for the years ended December 31, 2021 and 2020:

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, 2021 |  |  | December 31, 2020 |
|  | AmerenMissouri |  | AmerenIllinois |  |  |  | Ameren |  |  |  | AmerenMissouri |  | AmerenIllinois |  | Ameren |  |
| Beginning balance at January 1 | $ | 751  |  |  | $ | 5  |  |  |  | (a) | $ | 756  |  | (b) |  |  | $ | 687  |  |  | $ | 4  |  |  | $ | 691  |  |  |
| Liabilities incurred | 18  |  | (c) | —  |  |  |  |  | 18  |  | (c) |  |  | 36  |  | (c) | —  |  |  | 36  |  | (c) |
| Liabilities settled | (36) |  |  | (1) |  |  |  |  | (37) |  |  |  |  | (58) |  |  | —  |  |  | (58) |  |  |
| Accretion(d) | 31  |  |  | —  |  |  |  |  | 31  |  |  |  |  | 29  |  |  | 1  |  |  | 30  |  |  |
| Change in estimates | (4) |  | (e) | —  |  |  |  |  | (4) |  | (e) |  |  | 57  |  | (f) | —  |  |  | 57  |  | (f) |
| Ending balance at December 31 | $ | 760  |  | (g) | $ | 4  |  |  |  | (a) | $ | 764  |  | (b)(g) |  |  | $ | 751  |  |  | $ | 5  |  | (a) | $ | 756  |  | (b) |

(a)Included in “Other deferred credits and liabilities” on the balance sheet.(b)Balance included $7 million and $60 million in “Other current liabilities” on the balance sheet as of December 31, 2021 and 2020, respectively.(c)Ameren Missouri recorded AROs related to the decommissioning of the Atchison Renewable and High Prairie Renewable energy centers in 2021 and 2020, respectively.(d)Accretion expense attributable to Ameren Missouri and Ameren Illinois was recorded as a decrease to regulatory liabilities and an increase to regulatory assets, respectively.(e)Ameren Missouri changed its fair value estimate primarily due to a decrease in the cost estimate for closure of certain CCR storage facilities, partially offset by an increase due to the planned accelerated retirement of the Rush Island Energy Center.(f)Ameren Missouri changed its fair value estimate primarily due to an update to the decommissioning of the Callaway Energy Center to reflect the cost study and funding analysis filed with the MoPSC in November 2020 and an increase in the cost estimate for closure of certain CCR storage facilities.(g)The balance as of December 31, 2021, included an ARO related to the decommissioning of the Callaway Enter Center of $574 million.Noncontrolling InterestsAs of December 31, 2021 and 2020, Ameren’s noncontrolling interests included the preferred stock of Ameren Missouri and Ameren Illinois.Deferred CompensationAs of December 31, 2021, and 2020, the present value of benefits to be paid for deferred compensation obligations was $91 million and $90 million, respectively, which was primarily reflected in “Other deferred credits and liabilities” on Ameren’s consolidated balance sheet.Excise TaxesAmeren Missouri and Ameren Illinois collect from their customers excise taxes, including municipal and state excise taxes and gross receipts taxes, that are levied on the sale or distribution of natural gas and electricity. The following table presents the excise taxes recorded on a gross basis in “Operating Revenues – Electric,” “Operating Revenues – Natural gas” and “Operating Expenses – Taxes other than income taxes” on the statements of income for the years ended December 31, 2021, 2020, and 2019:

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | 2021 |  | 2020 |  | 2019 |  |
| Ameren Missouri | $ | 150  |  |  | $ | 139  |  |  | $ | 147  |  |  |
| Ameren Illinois | 125  |  |  | 115  |  |  | 117  |  |  |
| Ameren | $ | 275  |  |  | $ | 254  |  |  | $ | 264  |  |  |

152
