Note 6 - Fair Value of Financial Instruments (Tables)

9 Months Ended

Jun. 30, 2022

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

					Classification of Estimated Fair Value
	Carrying Amount		Fair Value		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)
Spire
As of June 30, 2022
Cash and cash equivalents	$	16.0	$	16.0	$	16.0	$	—
Notes payable		709.2		709.2		—		709.2
Long-term debt, including current portion		3,239.1		3,032.1		—		3,032.1
As of September 30, 2021
Cash and cash equivalents	$	4.3	$	4.3	$	4.3	$	—
Notes payable		672.0		672.0		—		672.0
Long-term debt, including current portion		2,994.9		3,375.9		—		3,375.9
As of June 30, 2021
Cash and cash equivalents	$	23.9	$	23.9	$	23.9	$	—
Notes payable		461.0		461.0		—		461.0
Long-term debt, including current portion		3,049.8		3,440.2		—		3,440.2
Spire Missouri
As of June 30, 2022
Cash and cash equivalents	$	7.0	$	7.0	$	7.0	$	—
Notes payable – associated companies		285.4		285.4		—		285.4
Long-term debt		1,637.4		1,562.4		—		1,562.4
As of September 30, 2021
Notes payable	$	250.0	$	250.0	$	—	$	250.0
Notes payable – associated companies		240.9		240.9		—		240.9
Long-term debt		1,338.4		1,540.4		—		1,540.4
As of June 30, 2021
Cash and cash equivalents	$	4.3	$	4.3	$	4.3	$	—
Notes payable		250.0		250.0		—		250.0
Notes payable – associated companies		217.5		217.5		—		217.5
Long-term debt		1,338.6		1,548.8		—		1,548.8
Spire Alabama
As of June 30, 2022
Cash and cash equivalents	$	3.7	$	3.7	$	3.7	$	—
Notes payable – associated companies		196.3		196.3		—		196.3
Long-term debt, including current portion		571.4		527.2		—		527.2
As of September 30, 2021
Notes payable – associated companies	$	49.0	$	49.0	$	—	$	49.0
Long-term debt		621.2		707.5		—		707.5
As of June 30, 2021
Cash and cash equivalents	$	9.5	$	9.5	$	9.5	$	—
Long-term debt, including current portion		621.2		710.5		—		710.5