Financing Arrangements and Long-term Debt (Tables)

3 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Schedule of Spire Missouri and Alabama Short-term Borrowings

Information about Spire’s consolidated short-term borrowings and about Spire Missouri’s and Spire Alabama’s borrowings from Spire is presented in the following table. As of December 31, 2019, $373.2 of Spire’s short-term borrowings were used to support lending to the Utilities.

	Spire CP Program Borrowings	Spire Missouri Borrowings from Spire	Spire Alabama Borrowings from Spire
Three Months Ended December 31, 2019
Weighted average borrowings outstanding	$727.7	$331.1	$115.0
Weighted average interest rate	2.2%	2.2%	2.2%
Range of borrowings outstanding	$510.9 – $856.6	$239.4 – $429.5	$43.8 – $161.3
As of December 31, 2019
Borrowings outstanding	$518.9	$288.1	$67.1
Weighted average interest rate	2.1%	2.1%	2.1%
As of September 30, 2019
Borrowings outstanding	$743.2	$386.4	$128.7
Weighted average interest rate	2.3%	2.3%	2.3%
As of December 31, 2018
Borrowings outstanding	$626.1	$308.0	$164.2
Weighted average interest rate	3.1%	3.1%	3.1%

Summary Capitalized Interest

Interest expense shown on Spire’s consolidated statements of income and Spire Missouri’s statements of comprehensive income is net of the capitalized interest amounts shown in the following table.

	Three Months Ended December 31,
	2019		2018
Spire	$	2.2	$	1.2
Spire Missouri		0.3		0.5
Spire Alabama		0.6		—