Financing Arrangements and Long-term Debt (Tables)

3 Months Ended

Dec. 31, 2018

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, 2018, $509.9 of Spire’s short-term borrowings were used to support lending to the Utilities.

	Spire Commercial Paper Borrowings	Spire Missouri Borrowings from Spire	Spire Alabama Borrowings from Spire
Three Months Ended December 31, 2018
Weighted average borrowings outstanding	$622.9	$343.9	$152.3
Weighted average interest rate	2.7%	2.7%	2.7%
Range of borrowings outstanding	$562.3 - $689.3	$273.6 - $404.9	$140.8 - $169.2
As of December 31, 2018
Borrowings outstanding	$626.1	$308.0	$164.2
Weighted average interest rate	3.1%	3.1%	3.1%
As of September 30, 2018
Borrowings outstanding	$553.6	$345.3	$142.5
Weighted average interest rate	2.4%	2.3%	2.3%
As of December 31, 2017
Borrowings outstanding	$583.6	$275.6	$163.1
Weighted average interest rate	2.0%	2.0%	2.0%

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,
	2018		2017
Spire	$	1.2	$	0.4
Spire Missouri		0.5		0.2