Note 10 - Information by Operating Segment (Tables)

3 Months Ended

Dec. 31, 2023

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Three Months Ended December 31, 2023
Revenues from external customers	$	715.2	$	36.3	$	5.0	$	0.1		$	—		$	756.6
Intersegment revenues		—		—		9.9		4.0			(13.9	)		—
Total Operating Revenues		715.2		36.3		14.9		4.1			(13.9	)		756.6
Depreciation and amortization expense		64.2		0.4		2.3		0.1			—			67.0
Interest expense		39.0		—		1.8		24.0			(14.2	)		50.6
Income tax expense		15.7		3.8		0.6		0.9			—			21.0
Net economic earnings (loss)		75.8		7.2		2.4		(2.7	)		—			82.7
Capital expenditures		174.9		—		52.0		—			(0.4	)		226.5

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Three Months Ended December 31, 2022
Revenues from external customers	$	733.0	$	74.1	$	6.8	$	0.1		$	—		$	814.0
Intersegment revenues		—		—		8.4		3.9			(12.3	)		—
Total Operating Revenues		733.0		74.1		15.2		4.0			(12.3	)		814.0
Depreciation and amortization expense		59.7		0.3		1.9		0.2			—			62.1
Interest expense		32.1		—		1.9		19.5			(9.9	)		43.6
Income tax expense (benefit)		12.4		10.5		1.4		(2.7	)		—			21.6
Net economic earnings (loss)		62.9		25.7		3.8		(7.3	)		—			85.1
Capital expenditures		146.3		0.2		7.7		0.6			—			154.8

Reconciliation Of Consolidated Net Economic Earnings To Consolidated Net Income [Table Text Block]

	Three Months Ended December 31,
	2023			2022
Net Income	$	85.1		$	91.0
Adjustments, pre-tax:
Fair value and timing adjustments		(5.2	)		(7.8	)
Acquisition activities		1.9			—
Income tax adjustments		0.9			1.9
Net Economic Earnings	$	82.7		$	85.1

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

	December 31,			September 30,			December 31,
	2023			2023			2022
Total Assets:
Gas Utility	$	8,736.7		$	8,486.7		$	8,355.1
Gas Marketing		207.0			332.0			492.4
Midstream		633.9			574.3			466.6
Other		2,755.1			2,533.3			2,882.8
Eliminations		(1,701.0	)		(1,612.7	)		(1,869.2	)
Total Assets	$	10,631.7		$	10,313.6		$	10,327.7