The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the balance sheets and the statements of cash flows at March 31, 2022, and December 31, 2021:


	March 31, 2022						December 31, 2021
	Ameren		Ameren Missouri		Ameren Illinois		Ameren		Ameren Missouri		Ameren Illinois
“Cash and cash equivalents”	$	7	$	1	$	—	$	8	$	—	$	—

Restricted cash included in “Other current assets”	10		3		5		16		4		6
Restricted cash included in “Other assets”	132		—		132		127		—		127
Restricted cash included in “Nuclear decommissioning trust fund”	5		5		—		4		4		—
Total cash, cash equivalents, and restricted cash	$	154	$	9	$	137	$	155	$	8	$	133

Restricted cash included in “Other current assets” primarily represents funds held by an irrevocable Voluntary Employee Beneficiary Association (VEBA) trust, which provides health care benefits for active employees. Restricted cash included in “Other assets” on Ameren’s and Ameren Illinois’ balance sheets primarily represents amounts collected under a cost recovery rider restricted for use in the procurement of renewable energy credits and amounts in a trust fund restricted for the use of funding certain asbestos-related claims.

“Accounts receivable – trade” on Ameren’s and Ameren Illinois’ balance sheets include certain receivables purchased at a discount from alternative retail electric suppliers that elect to participate in the utility consolidated billing program. At March 31, 2022, and December 31, 2021, “Other current liabilities” on Ameren’s and Ameren Illinois’ balance sheets included payables for purchased receivables of $29 million and $27 million, respectively.

The following table provides a reconciliation of the beginning and ending amount of the allowance for doubtful accounts for the three months ended March 31, 2022 and 2021:


	Three Months
		2022		2021
Ameren:
Beginning of period		$	29	$	50
Bad debt expense		4		4

Net write-offs		(5)		(7)

End of period		$	28	$	47
Ameren Missouri:
Beginning of period		$	13	$	16
Bad debt expense		1		1

Net write-offs		(3)		(2)
End of period		$	11	$	15
Ameren Illinois:(a)
Beginning of period		$	16	$	34
Bad debt expense		3		3

Net write-offs		(2)		(5)

End of period		$	17	$	32

(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.

Capital expenditures at Ameren and Ameren Missouri included wind generation expenditures of an immaterial amount for the three months ended March 31, 2022, and $193 million for the three months ended March 31, 2021.

The following table provides noncash financing and investing activity excluded from the statements of cash flows for the three months ended March 31, 2022 and 2021:


	March 31, 2022						March 31, 2021
	Ameren		Ameren Missouri				Ameren Illinois	Ameren		Ameren Missouri		Ameren Illinois
Investing
Accrued capital expenditures	$	345	$	194	$	147		$	271	$	141	$	139

Net realized and unrealized gain/(loss) – nuclear decommissioning trust fund	(71)		(71)		—			22		22		—
Financing
Issuance of common stock for stock-based compensation	$	31	$	—	$	—		$	33	$	—	$	—
Issuance of common stock under the DRPlus	8		—		—			—		—		—


	Ameren Missouri			Ameren Illinois			Ameren
Balance at December 31, 2021	$	760	(a)	$	4	(b)	$	764	(a)


Accretion	8		(c)	—			8		(c)
Change in estimates	4		(d)	—			4		(d)
Balance at March 31, 2022	$	772	(a)	$	4	(b)	$	776	(a)

(d)Ameren Missouri changed its fair value estimate primarily due to the change in useful life of the Sioux Energy Center, as reflected in depreciation rates approved by the December 2021 electric rate order, which became effective in 2022.

In the first quarter of 2022, Ameren granted 267,849 performance share units with a grant date fair value of $25 million and 122,882 restricted share units with a grant date fair value of $11 million. Awards vest approximately 3 years after the grant date or on a pro-rata basis upon death or eligible retirement. The performance share units vest based on the achievement of certain specified market performance measures (229,566 performance share units) or clean energy transition targets (38,283 performance share units). The exact number of shares issued pursuant to a performance share unit varies from 0% to 200% of the target award, depending on actual company performance relative to the performance goals.

For the three months ended March 31, 2022 and 2021, excess tax benefits associated with the settlement of stock-based compensation awards reduced income tax expense by $5 million in both periods.

At March 31, 2022, and December 31, 2021, the present value of benefits to be paid for deferred compensation obligations was $91 million in both periods, which was primarily reflected in “Other deferred credits and liabilities” on Ameren's consolidated balance sheet.

As of March 31, 2022 and 2021, our remaining performance obligations for contracts with a term greater than one year were immaterial. The Ameren Companies elected not to disclose the aggregate amount of the transaction price allocated to the performance obligations that are unsatisfied as of the end of the reporting period for contracts with an initial expected term of one year or less.

Ameren 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 three months ended March 31, 2022 and 2021:

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 months ended March 31, 2022 and 2021:


	Three Months
		2022	2021


Weighted-average Common Shares Outstanding – Basic		257.9	254.4
Assumed settlement of performance share units and restricted stock units		1.1	1.5

Weighted-average Common Shares Outstanding – Diluted(a)		259.0	255.9

(a)There was an immaterial number of anti-dilutive securities excluded from the earnings per diluted share calculations for the three months ended March 31, 2022. There were no anti-dilutive securities excluded from the earnings per diluted share calculations for the three months ended March 31, 2021.