Short-Term Debt And Liquidity Short-Term Debt and Liquidity (Tables)

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Schedule of Short-term Debt

The following table presents commercial paper outstanding, net of issuance discounts, as of June 30, 2019, and December 31, 2018:

	June 30, 2019		December 31, 2018
Ameren (parent)	$	595	$	470
Ameren Missouri	205		55
Ameren Illinois	199		72
Ameren consolidated	$	999	$	597

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 six months ended June 30, 2019 and 2018:

	Ameren (parent)			Ameren Missouri			Ameren Illinois			Ameren Consolidated
2019
Average daily commercial paper outstanding at par value	$	542		$	174		$	106		$	822
Weighted-average interest rate	2.80		%	2.79		%	2.72		%	2.79		%
Peak commercial paper during period at par value(a)	$	636		$	549		$	202		$	1,113
Peak interest rate	3.10		%	2.97		%	2.90		%	3.10		%
2018
Average daily commercial paper outstanding at par value	$	397		$	123		$	174		$	693
Weighted-average interest rate	2.14		%	1.94		%	2.20		%	2.12		%
Peak commercial paper during period at par value(a)	$	506		$	481		$	442		$	1,295
Peak interest rate	2.45		%	2.42		%	2.55		%	2.55		%

(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.