Short-Term Debt and Liquidity (Tables)

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Schedule of Short-term Debt

The following table presents the credit facility borrowings and commercial paper outstanding, net of issuance discounts, as of March 31, 2020, and December 31, 2019:

	March 31, 2020						December 31, 2019
	Credit Facility Borrowings		Commercial Paper		Total Short-term Debt		Credit Facility Borrowings		Commercial Paper		Total Short-term Debt
Ameren (parent)	$	275	$	150	$	425	$	—	$	153	$	153
Ameren Missouri	130		—		130		—		234		234
Ameren Illinois	60		—		60		—		53		53
Ameren consolidated	$	465	$	150	$	615	$	—	$	440	$	440

The following table summarizes the borrowing activity and relevant interest rates under the Credit Agreements for the three months ended March 31, 2020. There were no borrowings under the Credit Agreements for the three months ended March 31, 2019.

	Ameren (parent)			Ameren Missouri			Ameren Illinois			Total
Missouri Credit Agreement
Average daily credit facility borrowings outstanding during the period	$	1		$	12		$	—		$	13
Weighted-average interest rate	2.06		%	2.36		%	—		%	2.33		%
Peak credit facility borrowings during the period(a)	$	100		$	130		$	—		$	230
Peak interest rate	2.06		%	3.33		%	—		%	3.33		%
Illinois Credit Agreement
Average daily credit facility borrowings outstanding during the period	$	2		$	—		$	5		$	7
Weighted-average interest rate	2.06		%	—		%	2.05		%	2.06		%
Peak credit facility borrowings during the period(a)	$	175		$	—		$	60		$	235
Peak interest rate	2.06		%	—		%	2.05		%	2.06		%

(a) The timing of peak credit facility borrowings varies by company. Therefore, the sum of individual company peak amounts may not equal the Ameren consolidated peak credit facility borrowings for the period.

Commercial Paper

The following table summarizes the borrowing activity and relevant interest rates under Ameren (parent)’s, Ameren Missouri’s, and Ameren Illinois’ commercial paper programs for the three months ended March 31, 2020 and 2019:

	Ameren (parent)			Ameren Missouri				Ameren Illinois			Ameren Consolidated
2020
Average daily commercial paper outstanding at par value	$	154		$	383			$	71		$	608
Weighted-average interest rate	1.94		%	1.84		%		1.99		%	1.88		%
Peak commercial paper during period at par value(a)	$	225		$	521			$	137		$	854
Peak interest rate	3.30		%	5.05		%	(b)	3.40		%	5.05		%	(b)
2019
Average daily commercial paper outstanding at par value	$	480		$	246			$	89		$	815
Weighted-average interest rate	2.87		%	2.84		%		2.76		%	2.85		%
Peak commercial paper during period at par value(a)	$	618		$	549			$	130		$	1,113
Peak interest rate	3.10		%	2.97		%		2.90		%	3.10		%

(a)

The timing of peak outstanding commercial paper issuances varies by company. Therefore, the sum of individual company peak amounts may not equal the Ameren consolidated peak commercial paper issuances for the period.