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Supplemental Information (Tables)

6 Months Ended

Jun. 30, 2020

Schedule of Cash and Cash Equivalents Including Restricted Cash

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the balance sheets and the statements of cash flows as of June 30, 2020, and December 31, 2019:


	June 30, 2020															December 31, 2019
			Ameren			Ameren Missouri			Ameren Illinois			Ameren			Ameren Missouri			Ameren Illinois
Cash and cash equivalents	$	8		$	—		$	2		$	16		$	9		$	—
Restricted cash included in “Other current assets”	14			5			5			14			4			5
Restricted cash included in “Other assets”	135			—			135			120			—			120
Restricted cash included in “Nuclear decommissioning trust fund”	6			6			—			26			26			—
Total cash, cash equivalents, and restricted cash	$	163		$	11		$	142		$	176		$	39		$	125

Schedule of Accounts, Notes, Loans and Financing Receivable

The following table provides a reconciliation of the beginning and ending amount of the allowance for doubtful accounts for the three and six months ended June 30, 2020 and 2019:


	Three Months						Six Months
	2020		2019		2020		2019
Ameren:
Beginning of period	$	19	$	19	$	17	$	18
Bad debt expense	7		5		10		8

Net write-offs	(1)		(5)		(2)		(7)

End of period	$	25	$	19	$	25	$	19
Ameren Missouri:
Beginning of period	$	8	$	7	$	7	$	7
Bad debt expense	2		2		4		3

Net write-offs	(1)		(2)		(2)		(3)
End of period	$	9	$	7	$	9	$	7
Ameren Illinois:^(a)
Beginning of Period	$	11	$	12	$	10	$	11
Bad debt expense	5		3		6		5

Net write-offs	—		(3)		—		(4)

End of Period	$	16	$	12	$	16	$	12

(a)Ameren Illinois has rate-adjustment mechanisms that allow it to recover the difference between its actual net bad debt write-offs under GAAP, including those associated with receivables purchased from alternative retail electric suppliers, and the amount of net bad debt write-offs included in its base rates. In 2020, the rate-adjustment mechanism for electric distribution allows for recovery of bad debt expense recognized under GAAP. See Note 2 – Rate and Regulatory Matters for additional information.

Schedule of Cash Flow, Supplemental Disclosures

Supplemental Cash Flow Information

The following table provides noncash financing and investing activity excluded from the statements of cash flows for the six months ended June 30, 2020 and 2019:


	June 30, 2020												June 30, 2019
			Ameren		Ameren Missouri			Ameren Illinois					Ameren		Ameren Missouri	Ameren Illinois
Investing


Accrued capital expenditures	$	287	$	111		$	165		$	263	$	101	$	143


Net realized and unrealized gain (loss) – nuclear decommissioning trust fund	(4)		(4)			—			90		90		—
Financing

Issuance of common stock for stock-based compensation	$	38	$	—		$	—		$	54	$	—	$	—

Asset Retirement Obligation Disclosure

The following table provides a reconciliation of the beginning and ending carrying amount of AROs for the six months ended June 30, 2020:


	Ameren Missouri			Ameren Illinois			Ameren
Balance at December 31, 2019	$	687	^(a)	$	4	^(b)	$	691	^(a)

Liabilities settled	(28)			—			(28)
Accretion	15		^(c)	—			15		^(c)
Change in estimates	14		^(d)	—			14		^(d)
Balance at June 30, 2020	$	688	^(a)	$	4	^(b)	$	692	^(a)

(a)Balance included $53 million in “Other current liabilities” on the balance sheet as of both December 31, 2019, and June 30, 2020.

(b)Included in “Other deferred credits and liabilities” on the balance sheet.

(c)Accretion expense attributable to Ameren Missouri was recorded as a decrease to regulatory liabilities.

(d)Ameren Missouri changed its fair value estimate primarily due to an increase in the cost estimate for closure of certain CCR storage facilities.

Schedule of excise taxes

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 three and six months ended June 30, 2020 and 2019:


	Three Months						Six Months
	2020		2019		2020			2019
Ameren Missouri	$	36	$	38	$	66		$	69
Ameren Illinois	26		25		61			64
Ameren	$	62	$	63	$	127		$	133

Schedule of Earnings Per Share, Basic and Diluted

The following table reconciles the basic weighted-average number of common shares outstanding to the diluted weighted-average number of common shares outstanding for the three and six months ended June 30, 2020 and 2019:


	Three Months			Six Months
	2020	2019	2020	2019


Weighted-average Common Shares Outstanding – Basic	246.9	245.6	246.7	245.3
Assumed settlement of performance share units and restricted stock units	1.0	1.6	1.0	1.5
Dilutive effect of forward sale agreement	—	—	0.3	—
Weighted-average Common Shares Outstanding – Diluted^(a)	247.9	247.2	248.0	246.8

(a)There were no potentially dilutive securities excluded from the earnings per diluted share calculations for the three and six months ended June 30, 2020 and 2019.