Information by Operating Segment (Tables)

9 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Schedule of Operating Segment Information

	Gas Utility		Gas Marketing			Other			Eliminations			Consolidated
Three Months Ended June 30, 2021
Operating Revenues:
Revenues from external customers	$	306.7	$	15.2		$	5.9		$	—		$	327.8
Intersegment revenues		—		(0.1	)		11.9			(11.8	)		—
Total Operating Revenues		306.7		15.1			17.8			(11.8	)		327.8
Operating Expenses:
Natural gas		84.9		20.2			—			(8.2	)		96.9
Operation and maintenance		103.2		3.2			9.2			(3.6	)		112.0
Depreciation and amortization		50.9		0.3			1.9			—			53.1
Taxes, other than income taxes		32.1		0.2			0.3			—			32.6
Total Operating Expenses		271.1		23.9			11.4			(11.8	)		294.6
Operating Income (Loss)	$	35.6	$	(8.8	)	$	6.4		$	—		$	33.2
Net Economic Earnings (Loss)	$	12.3	$	(5.2	)	$	(0.2	)	$	—		$	6.9

	Gas Utility		Gas Marketing			Other			Eliminations			Consolidated
Three Months Ended June 30, 2020
Operating Revenues:
Revenues from external customers	$	305.7	$	11.6		$	3.8		$	—		$	321.1
Intersegment revenues		0.3		—			11.6			(11.9	)		—
Total Operating Revenues		306.0		11.6			15.4			(11.9	)		321.1
Operating Expenses:
Natural gas		90.6		(9.2	)		0.1			(8.6	)		72.9
Operation and maintenance		115.5		2.2			10.5			(3.3	)		124.9
Depreciation and amortization		47.8		0.2			2.1			—			50.1
Taxes, other than income taxes		31.7		0.2			(0.8	)		—			31.1
Impairments		—		—			148.6			—			148.6
Total Operating Expenses		285.6		(6.6	)		160.5			(11.9	)		427.6
Operating Income (Loss)	$	20.4	$	18.2		$	(145.1	)	$	—		$	(106.5	)
Net Economic Earnings (Loss)	$	8.4	$	0.1		$	(1.2	)	$	—		$	7.3

	Gas Utility		Gas Marketing		Other			Eliminations			Consolidated
Nine Months Ended June 30, 2021
Operating Revenues:
Revenues from external customers	$	1,856.9	$	73.3	$	15.1		$	—		$	1,945.3
Intersegment revenues		1.1		—		35.0			(36.1	)		—
Total Operating Revenues		1,858.0		73.3		50.1			(36.1	)		1,945.3
Operating Expenses:
Natural gas		908.4		14.7		0.1			(26.0	)		897.2
Operation and maintenance		310.2		13.6		28.9			(10.1	)		342.6
Depreciation and amortization		149.0		0.9		5.5			—			155.4
Taxes, other than income taxes		124.0		0.9		1.7			—			126.6
Total Operating Expenses		1,491.6		30.1		36.2			(36.1	)		1,521.8
Operating Income	$	366.4	$	43.2	$	13.9		$	—		$	423.5
Net Economic Earnings (Loss)	$	248.4	$	37.9	$	(6.9	)	$	—		$	279.4
	Gas Utility		Gas Marketing		Other			Eliminations			Consolidated
Nine Months Ended June 30, 2020
Operating Revenues:
Revenues from external customers	$	1,515.4	$	77.2	$	10.9		$	—		$	1,603.5
Intersegment revenues		0.3		—		30.3			(30.6	)		—
Total Operating Revenues		1,515.7		77.2		41.2			(30.6	)		1,603.5
Operating Expenses:
Natural gas		603.7		48.9		0.3			(21.0	)		631.9
Operation and maintenance		319.9		8.9		28.0			(9.6	)		347.2
Depreciation and amortization		141.2		0.3		5.3			—			146.8
Taxes, other than income taxes		121.3		0.9		0.5			—			122.7
Impairments		—		—		148.6			—			148.6
Total Operating Expenses		1,186.1		59.0		182.7			(30.6	)		1,397.2
Operating Income (Loss)	$	329.6	$	18.2	$	(141.5	)	$	—		$	206.3
Net Economic Earnings (Loss)	$	221.8	$	11.3	$	(10.0	)	$	—		$	223.1

	June 30,			September 30,			June 30,
	2021			2020			2020
Total Assets:
Gas Utility	$	7,302.4		$	6,716.2		$	6,330.1
Gas Marketing		349.2			182.7			158.6
Other		2,256.3			2,443.5			2,324.8
Eliminations		(1,014.6	)		(1,101.2	)		(990.9	)
Total Assets	$	8,893.3		$	8,241.2		$	7,822.6

Schedule of Reconciliation of Consolidated Net Economic Earnings to Consolidated Net Income

The following table reconciles the Company’s net economic earnings to net income. For information about the Missouri regulatory adjustment for $9.0 of pension costs in fiscal 2021 and the provision for ISRS rulings in fiscal 2020, see Note 4, Regulatory Matters.

	Three Months Ended June 30,						Nine Months Ended June 30,
	2021			2020			2021			2020
Net Income	$	5.3		$	(92.3	)	$	281.6		$	108.3
Adjustments, pre-tax:
Impairments		—			148.6			—			148.6
Missouri regulatory adjustment		—			—			(9.0	)		—
Provision for ISRS rulings		—			(4.8	)		—			—
Fair value and timing adjustments		2.1			(18.5	)		6.2			(3.2	)
Income tax effect of adjustments		(0.5	)		(25.7	)		0.6			(30.6	)
Net Economic Earnings	$	6.9		$	7.3		$	279.4		$	223.1