Fair Value Measurements

3 Months Ended

Mar. 31, 2024

FAIR VALUE MEASUREMENTS

Fair value is defined as the price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Fair value measurements are classified in three levels based on the fair value hierarchy as defined by GAAP. See Note 8 – Fair Value Measurements under Part II, Item 8, of the Form 10-K for information related to hierarchy levels and valuation techniques.

We consider nonperformance risk in our valuation of derivative instruments by analyzing our own credit standing and the credit standing of our counterparties, and by considering any credit enhancements (e.g., collateral). Included in our valuation, and based on current market conditions, is a valuation adjustment for counterparty default derived from market data such as the price of credit default swaps, bond yields, and credit ratings. No material gains or losses related to valuation adjustments for counterparty default risk were recorded at Ameren, Ameren Missouri, or Ameren Illinois in the three months ended March 31, 2024 or 2023. At March 31, 2024, and December 31, 2023, the counterparty default risk valuation adjustment related to derivative contracts was immaterial for Ameren, Ameren Missouri, and Ameren Illinois.

The following table sets forth, by level within the fair value hierarchy, our assets and liabilities measured at fair value on a recurring basis as of March 31, 2024, and December 31, 2023:


		March 31, 2024									December 31, 2023
		Level 1		Level 2		Level 3		Total			Level 1		Level 2		Level 3		Total
Assets:
Ameren Missouri
	Derivative assets – commodity contracts:
	Fuel oils	$	2	$	—	$	—	$	2		$	2	$	—	$	—	$	2
	Natural gas	—		3		—		3			—		3		—		3
	Power	—		—		2		2			—		—		5		5
	Uranium	—		—		—		—			—		—		9		9
	Total derivative assets – commodity contracts	$	2	$	3	$	2	$	7		$	2	$	3	$	14	$	19
	Nuclear decommissioning trust fund:

	Equity securities:
	U.S. large capitalization	$	868	$	—	$	—	$	868		$	787	$	—	$	—	$	787
	Debt securities:
	U.S. Treasury and agency securities	—		145		—		145			—		150		—		150
	Corporate bonds	—		139		—		139			—		136		—		136


	Other	—		72		—		72			—		68		—		68
	Total nuclear decommissioning trust fund	$	868	$	356	$	—	$	1,224	(a)	$	787	$	354	$	—	$	1,141	(a)
	Total Ameren Missouri	$	870	$	359	$	2	$	1,231		$	789	$	357	$	14	$	1,160
Ameren Illinois
	Derivative assets – commodity contracts:
	Natural gas	$	—	$	1	$	3	$	4		$	—	$	1	$	2	$	3
	Power	—		—		—		—			—		—		—		—
	Total Ameren Illinois	$	—	$	1	$	3	$	4		$	—	$	1	$	2	$	3
Ameren
	Derivative assets – commodity contracts(b)	$	2	$	4	$	5	$	11		$	2	$	4	$	16	$	22
	Nuclear decommissioning trust fund(c)	868		356		—		1,224		(a)	787		354		—		1,141		(a)
	Total Ameren	$	870	$	360	$	5	$	1,235		$	789	$	358	$	16	$	1,163
Liabilities:
Ameren Missouri
	Derivative liabilities – commodity contracts:
	Fuel oils	$	1	$	—	$	—	$	1		$	2	$	—	$	—	$	2
	Natural gas	—		18		1		19			—		19		3		22
	Power	—		—		—		—			—		—		1		1

	Total Ameren Missouri	$	1	$	18	$	1	$	20		$	2	$	19	$	4	$	25
Ameren Illinois
	Derivative liabilities – commodity contracts:
	Natural gas	$	2	$	61	$	8	$	71		$	4	$	60	$	11	$	75
	Power	—		—		54		54			—		—		68		68
	Total Ameren Illinois	$	2	$	61	$	62	$	125		$	4	$	60	$	79	$	143
Ameren
	Derivative liabilities – commodity contracts(b)	$	3	$	79	$	63	$	145		$	6	$	79	$	83	$	168

(a)Balance excludes $8 million and $9 million of cash and cash equivalents, receivables, payables, and accrued income, net, for March 31, 2024, and December 31, 2023, respectively.

(b)See the Ameren Missouri and Ameren Illinois sections of the table for a breakout of the fair value of Ameren’s derivative assets and liabilities by type of commodity.

(c)See the Ameren Missouri section of the table for a breakout of the fair value of Ameren’s nuclear decommissioning trust fund by investment type.

Level 3 fuel oils, natural gas, and uranium derivative contract assets and liabilities measured at fair value on a recurring basis were immaterial for all periods presented. The following table presents the fair value reconciliation of Level 3 power derivative contract assets and liabilities measured at fair value on a recurring basis for the three months ended March 31, 2024 and 2023:


	2024						2023
	Ameren Missouri		Ameren Illinois		Ameren			Ameren Missouri		Ameren Illinois		Ameren
For the three months ended March 31:
Beginning balance at January 1	$	4	$	(68)	$	(64)		$	12	$	(33)	$	(21)
Realized and unrealized gains/(losses) included in regulatory assets/liabilities	(1)		10		9			(6)		(20)		(26)


Settlements	(1)		4		3			(1)		1		—


Ending balance at March 31	$	2	$	(54)	$	(52)		$	5	$	(52)	$	(47)
Change in unrealized gains/(losses) related to assets/liabilities held at March 31	$	—	$	11	$	11		$	(2)	$	(18)	$	(20)

All gains or losses related to our Level 3 derivative commodity contracts are expected to be recovered or returned through customer rates; therefore, there is no impact to either net income or other comprehensive income resulting from changes in the fair value of these instruments.

The following table describes the valuation techniques and significant unobservable inputs utilized for the fair value of our Level 3 power derivative contract assets and liabilities as of March 31, 2024, and December 31, 2023:


			Fair Value						Weighted Average(b)
	Commodity		Assets		Liabilities	Valuation Technique(s)	Unobservable Input(a)	Range
2024	Power(c)	$	2	$	(54)	Discounted cash flow	Average forward peak and off-peak pricing – forwards/swaps ($/MWh)	22 – 68	45

							Nodal basis ($/MWh)	(8) – (2)	(5)


2023	Power(c)	$	5	$	(69)	Discounted cash flow	Average forward peak and off-peak pricing – forwards/swaps ($/MWh)	31 – 65	43

							Nodal basis ($/MWh)	(8) – (1)	(5)

(a)Generally, significant increases (decreases) in these inputs in isolation would result in a significantly higher (lower) fair value measurement.

(b)Unobservable inputs were weighted by relative fair value.

(c)Valuations use visible forward prices adjusted for nodal-to-hub basis differentials.

The following table sets forth the carrying amount and, by level within the fair value hierarchy, the fair value of long-term debt (including current portion) disclosed, but not recorded, at fair value as of March 31, 2024, and December 31, 2023:


Long-Term Debt (Including Current Portion):	Carrying Amount(a)	Fair Value
		Level 2	Level 3		Total
	March 31, 2024




Ameren	16,316	14,258	453	(b)	14,711






Ameren Missouri	6,686	5,923	—		5,923





Ameren Illinois	5,233	4,668	—		4,668
	December 31, 2023



Ameren	15,970	14,366	467	(b)	14,833






Ameren Missouri	6,341	5,800	—		5,800




Ameren Illinois	5,232	4,867	—		4,867

(a)Included unamortized debt issuance costs, which were excluded from the fair value measurement, of $114 million, $48 million, and $46 million for Ameren, Ameren Missouri, and Ameren Illinois, respectively, as of March 31, 2024. Included unamortized debt issuance costs, which were excluded from the fair value measurement, of $111 million, $45 million, and $47 million for Ameren, Ameren Missouri, and Ameren Illinois, respectively, as of December 31, 2023.

(b)The Level 3 fair value amount consists of ATXI’s senior unsecured notes.

The Ameren Companies’ carrying amounts of cash, cash equivalents, and restricted cash approximate fair value and are considered Level 1 in the fair value hierarchy. The Ameren Companies’ short-term borrowings approximate fair value because of the short-term nature of these instruments and are considered Level 2 in the fair value hierarchy.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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