Pension Plans and Other Postretirement Benefits (Tables)

12 Months Ended

Sep. 30, 2021

Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]

Fair Value Measurements Of Plan Assets

The table below categorizes the fair value measurements of the Spire pension plan assets:

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
As of September 30, 2021
Cash and cash equivalents	$	10.6	$	—	$	—	$	10.6
Equity funds - global (including U.S.)		—		201.2		—		201.2
Real asset funds		—		87.7		—		87.7
Debt securities:
U.S. bond funds		58.4		—		—		58.4
U.S. government index funds		60.1		—		—		60.1
Global funds (including U.S.)		—		80.9		—		80.9
Total	$	129.1	$	369.8	$	—	$	498.9
As of September 30, 2020
Cash and cash equivalents	$	11.5	$	—	$	—	$	11.5
Equity funds - global (including U.S.)		31.4		195.6		—		227.0
Equity index funds - global (including U.S.)		32.6		—		—		32.6
Debt securities:
U.S. bond funds		48.9		—		—		48.9
U.S. government index funds		78.3		—		—		78.3
Global funds (including U.S.)		—		74.8		—		74.8
Total	$	202.7	$	270.4	$	—	$	473.1

The table below categorizes the fair value measurements of Spire’s postretirement plan assets:

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
As of September 30, 2021
Cash and cash equivalents	$	3.1	$	—	$	—	$	3.1
U.S. stock/bond mutual funds		223.2		82.5		—		305.7
International fund		1.2		16.9		—		18.1
Total	$	227.5	$	99.4	$	—	$	326.9
As of September 30, 2020
Cash and cash equivalents	$	3.6	$	—	$	—	$	3.6
U.S. stock/bond mutual funds		199.4		72.2		—		271.6
International fund		1.0		14.8		—		15.8
Total	$	204.0	$	87.0	$	—	$	291.0

Spire Missouri

Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]

Fair Value Measurements Of Plan Assets

The table below categorizes the fair value measurements of Spire Missouri’s pension plan assets:

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
As of September 30, 2021
Cash and cash equivalents	$	8.3	$	—	$	—	$	8.3
Equity funds - global (including U.S.)		—		148.6		—		148.6
Real asset funds		—		59.2		—		59.2
Debt securities:
U.S. bond funds		38.4		—		—		38.4
U.S. government index funds		45.6		—		—		45.6
Global funds (including U.S.)		—		63.9		—		63.9
Total	$	92.3	$	271.7	$	—	$	364.0
As of September 30, 2020
Cash and cash equivalents	$	9.5	$	—	$	—	$	9.5
Equity funds - global (including U.S.)		22.1		137.8		—		159.9
Equity index funds - global (including U.S.)		22.8		—		—		22.8
Debt securities:
U.S. bond funds		31.0		—		—		31.0
U.S. government index funds		59.6		—		—		59.6
Global funds (including U.S.)		—		53.4		—		53.4
Total	$	145.0	$	191.2	$	—	$	336.2

The table below categorizes the fair value measurements of Spire Missouri’s postretirement plan assets:

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
As of September 30, 2021
Cash and cash equivalents	$	2.4	$	—	$	—	$	2.4
U.S. stock/bond mutual funds		219.3		—		—		219.3
Total	$	221.7	$	—	$	—	$	221.7
As of September 30, 2020
Cash and cash equivalents	$	3.0	$	—	$	—	$	3.0
U.S. stock/bond mutual funds		196.2		—		—		196.2
Total	$	199.2	$	—	$	—	$	199.2

Spire Alabama

Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]

Fair Value Measurements Of Plan Assets

The table below categorizes the fair value measurements of Spire Alabama’s pension plan assets:

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
As of September 30, 2021
Cash and cash equivalents	$	1.4	$	—	$	—	$	1.4
Equity funds - global (including U.S.)		—		32.3		—		32.3
Real asset funds		—		14.6		—		14.6
Debt securities:
U.S. bond funds		12.3		—		—		12.3
U.S. government index funds		8.9		—		—		8.9
Global funds (including U.S.)		—		13.3		—		13.3
Total	$	22.6	$	60.2	$	—	$	82.8
As of September 30, 2020
Cash and cash equivalents	$	0.9	$	—	$	—	$	0.9
Equity funds - global (including U.S.)		6.1		37.5		—		43.6
Equity index funds - global (including U.S.)		6.4		—		—		6.4
Debt securities:
U.S. bond funds		11.7		—		—		11.7
U.S. government index funds		12.1		—		—		12.1
Global funds (including U.S.)		—		13.9		—		13.9
Total	$	37.2	$	51.4	$	—	$	88.6

The table below categorizes the fair value measurements of Spire Alabama’s postretirement plan assets:

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
As of September 30, 2021
U.S. stock/bond mutual funds	$	—	$	82.5	$	—	$	82.5
International fund		—		16.9		—		16.9
Total	$	—	$	99.4	$	—	$	99.4
As of September 30, 2020
U.S. stock/bond mutual funds	$	—	$	72.2	$	—	$	72.2
International fund		—		14.8		—		14.8
Total	$	—	$	87.0	$	—	$	87.0

Pension Plans

Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]

Net Periodic Cost

The net periodic pension costs include the following components:

	Spire									Spire Missouri									Spire Alabama
	2021			2020			2019			2021			2020			2019			2021			2020			2019
Service cost – benefits earned during the period	$	21.7		$	22.5		$	19.3		$	15.4		$	15.7		$	12.4		$	5.5		$	6.1		$	6.2
Interest cost on projected benefit obligation		20.7			22.6			28.2			14.2			15.8			19.8			4.6			4.9			6.0
Expected return on plan assets		(31.6	)		(35.0	)		(36.3	)		(22.5	)		(24.6	)		(25.5	)		(5.8	)		(6.9	)		(7.3	)
Amortization of prior service (credit) cost		(3.1	)		(2.5	)		(1.1	)		(0.6	)		0.1			0.9			(2.3	)		(2.4	)		(1.8	)
Amortization of actuarial loss		14.9			14.4			9.3			11.0			11.3			8.7			3.9			3.1			0.8
Loss on lump-sum settlements and curtailments		18.2			31.6			—			11.6			26.6			—			6.6			5.0			—
Subtotal		40.8			53.6			19.4			29.1			44.9			16.3			12.5			9.8			3.9
Regulatory adjustment		20.6			6.6			39.6			19.0			3.9			31.8			0.7			1.8			6.9
Net pension cost	$	61.4		$	60.2		$	59.0		$	48.1		$	48.8		$	48.1		$	13.2		$	11.6		$	10.8

Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income

Other changes in plan assets and pension benefit obligations recognized in other comprehensive income or loss include the following:

	Spire									Spire Missouri									Spire Alabama
	2021			2020			2019			2021			2020			2019			2021			2020			2019
Current year actuarial (gain) loss	$	(8.1	)	$	68.0		$	90.9		$	(0.9	)	$	37.8		$	59.0		$	(1.5	)	$	24.4		$	26.3
Amortization of actuarial loss		(14.9	)		(14.4	)		(9.3	)		(11.0	)		(11.3	)		(8.7	)		(3.9	)		(3.1	)		(0.8	)
Acceleration of loss recognized due to settlement		(18.2	)		(31.7	)		—			(11.6	)		(26.6	)		—			(6.6	)		(5.1	)		—
Current year service credit		(17.9	)		(4.4	)		(10.2	)		(17.9	)		(4.4	)		(3.7	)		—			—			(6.5	)
Amortization of prior service credit (cost)		3.1			2.5			1.1			0.6			(0.1	)		(0.9	)		2.3			2.4			1.8
Subtotal		(56.0	)		20.0			72.5			(40.8	)		(4.6	)		45.7			(9.7	)		18.6			20.8
Regulatory adjustment		57.3			(19.5	)		(71.7	)		42.1			5.1			(44.9	)		9.7			(18.6	)		(20.8	)
Total recognized in OCI	$	1.3		$	0.5		$	0.8		$	1.3		$	0.5		$	0.8		$	—		$	—		$	—

Reconciliation of the Beginning and Ending Balances of Benefit Obligation

The following table shows the reconciliation of the beginning and ending balances of the pension benefit obligation at September 30:

	Spire						Spire Missouri						Spire Alabama
	2021			2020			2021			2020			2021			2020
Benefit obligation, beginning of year	$	732.6		$	751.4		$	505.2		$	538.4		$	163.5		$	152.5
Service cost		21.7			22.5			15.4			15.7			5.5			6.1
Interest cost		20.7			22.6			14.2			15.8			4.6			4.9
Actuarial loss (gain)		6.6			37.5			11.0			15.6			(1.8	)		18.4
Plan amendments		(17.9	)		(4.4	)		(17.9	)		(4.4	)		—			—
Settlement loss		12.3			16.5			8.2			16.5			4.1			—
Settlement benefits paid		(67.6	)		(89.3	)		(44.6	)		(74.5	)		(22.9	)		(14.8	)
Regular benefits paid		(18.8	)		(24.2	)		(12.5	)		(17.9	)		(3.6	)		(3.6	)
Benefit obligation, end of year	$	689.6		$	732.6		$	479.0		$	505.2		$	149.4		$	163.5
Accumulated benefit obligation, end of year	$	673.3		$	699.3		$	465.4		$	473.7		$	146.9		$	161.8

Fair Value of Plan Assets

The following table sets forth the reconciliation of the beginning and ending balances of the fair value of plan assets at September 30:

	Spire						Spire Missouri						Spire Alabama
	2021			2020			2021			2020			2021			2020
Fair value of plan assets, beginning of year	$	473.1		$	521.8		$	336.2		$	379.2		$	88.6		$	93.3
Actual return on plan assets		58.8			21.1			42.7			19.1			9.6			1.0
Employer contributions		53.4			43.7			42.2			30.3			11.1			12.7
Settlement benefits paid		(67.6	)		(89.3	)		(44.6	)		(74.5	)		(22.9	)		(14.8	)
Regular benefits paid		(18.8	)		(24.2	)		(12.5	)		(17.9	)		(3.6	)		(3.6	)
Fair value of plan assets, end of year	$	498.9		$	473.1		$	364.0		$	336.2		$	82.8		$	88.6
Funded status of plans, end of year	$	(190.7	)	$	(259.5	)	$	(115.0	)	$	(169.0	)	$	(66.6	)	$	(74.9	)

Amounts Recognized in Consolidated Balance Sheets

The following table sets forth the amounts recognized in the balance sheets at September 30:

	Spire						Spire Missouri						Spire Alabama
	2021			2020			2021			2020			2021			2020
Current liabilities	$	(0.8	)	$	(0.6	)	$	(0.8	)	$	(0.6	)	$	—		$	—
Noncurrent liabilities		(189.9	)		(258.9	)		(114.2	)		(168.4	)		(66.6	)		(74.9	)
Total	$	(190.7	)	$	(259.5	)	$	(115.0	)	$	(169.0	)	$	(66.6	)	$	(74.9	)

Pre-tax Amounts Expected to Amortized From Accumulated Other Comprehensive Loss Into Net Periodic Pension Cost

Pre-tax amounts recognized in accumulated other comprehensive loss not yet recognized as components of net periodic pension cost consist of:

	Spire						Spire Missouri						Spire Alabama
	2021			2020			2021			2020			2021			2020
Net actuarial loss	$	194.6		$	235.6		$	129.6		$	152.9		$	66.1		$	78.1
Prior service credit		(40.3	)		(25.6	)		(20.1	)		(2.8	)		(18.7	)		(21.1	)
Subtotal		154.3			210.0			109.5			150.1			47.4			57.0
Adjustments for amounts included in regulatory assets		(149.5	)		(206.7	)		(104.7	)		(146.8	)		(47.4	)		(57.0	)
Total	$	4.8		$	3.3		$	4.8		$	3.3		$	—		$	—

Assumptions Used to Calculate Net Periodic Cost and Benefit Obligations

The assumptions used to calculate net periodic pension costs for Spire Missouri are as follows:

	2021	2020	2019
Weighted average discount rate - Spire Missouri East plan	2.85%	3.20%	4.30%
Weighted average discount rate - Spire Missouri West plan	2.75%	3.15%	4.35%
Weighted average rate of future compensation increase	3.00%	3.00%	3.00%
Expected long-term rate of return on plan assets	6.75%	7.25%	7.50%

The assumptions used to calculate net periodic pension costs for Spire Alabama are as follows:

	2021	2020	2019
Weighted average discount rate	2.95%/2.80%	3.25%/3.20%	4.35%
Weighted average rate of future compensation increase	3.00%	3.00%	3.00%
Expected long-term rate of return on plan assets	6.75%	7.25%	7.25%

The assumptions used to calculate the benefit obligations are as follows:

	2021	2020
Weighted average discount rate - Spire Missouri East plan	3.00%	2.85%
Weighted average discount rate - Spire Missouri West plan	3.00%	2.75%
Weighted average discount rate - Spire Alabama plans	3.1%/3.0%	2.95%/2.80%
Weighted average rate of future compensation increase	3.00%	3.00%
Cash balance interest crediting rate - Spire Alabama / Spire Missouri	4.25%	4.50%

Projected Benefit Obligation, Accumulated Benefit Obligation, and Fair Value of Plan Assets for Plans That Have Projected Benefit Obligation and Accumulated Benefit Obligation in Excess of Plan Assets

Following are the year-end projected benefit obligation, accumulated benefit obligation, and fair value of plan assets for plans that have a projected benefit obligation and an accumulated benefit obligation in excess of plan assets:

	Spire				Spire Missouri				Spire Alabama
	2021		2020		2021		2020		2021		2020
Projected benefit obligation	$	689.6	$	732.6	$	479.0	$	505.2	$	149.4	$	163.5
Accumulated benefit obligation		673.3		699.3		465.4		473.7		146.9		161.8
Fair value of plan assets		498.9		473.1		364.0		336.2		82.8		88.6

Targeted and Actual Plan Assets by Category

Following are the targeted and actual plan assets by category as of September 30 of each year for Spire Missouri and Spire Alabama:

Spire Missouri	2021 Target			2021 Actual			2020 Target			2020 Actual
Return seeking assets		70.0	%		74.5	%		70.0	%		70.0	%
Liability hedging assets		30.0	%		23.1	%		30.0	%		27.0	%
Other		—	%		2.4	%		—	%		3.0	%
Total		100.0	%		100.0	%		100.0	%		100.0	%

Spire Alabama	2021 Target			2021 Actual			2020 Target			2020 Actual
Return seeking assets		70.0	%		72.8	%		70.0	%		71.0	%
Liability hedging assets		30.0	%		25.5	%		30.0	%		27.0	%
Other*		—	%		1.7	%		—	%		2.0	%
Total		100.0	%		100.0	%		100.0	%		100.0	%

Expected Benefit Payments for Succeeding Five Fiscal Years

Following are expected pension benefit payments for the succeeding five fiscal years, and in aggregate for the five fiscal years thereafter, for Spire, Spire Missouri, and Spire Alabama:

	2022		2023		2024		2025		2026		2027- 2031
Spire	$	64.3	$	59.2	$	57.8	$	52.4	$	50.6	$	236.8
Spire Missouri		46.6		42.2		41.9		36.9		34.9		164.3
Spire Alabama		14.7		13.9		12.7		12.2		12.3		54.0

Other Postretirement Plans

Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]

Net Periodic Cost

Net periodic postretirement benefit costs consist of the following components:

	Spire									Spire Missouri									Spire Alabama
	2021			2020			2019			2021			2020			2019			2021			2020			2019
Service cost – benefits earned during the period	$	7.3		$	5.9		$	7.4		$	6.2		$	5.3		$	6.8		$	0.9		$	0.4		$	0.4
Interest cost on accumulated postretirement   benefit obligation		6.0			6.3			9.0			4.5			4.7			6.9			1.3			1.4			1.8
Expected return on plan assets		(16.1	)		(16.7	)		(16.2	)		(10.9	)		(11.4	)		(11.1	)		(4.9	)		(5.0	)		(4.8	)
Amortization of prior service cost (credit)		1.0			(0.5	)		(0.1	)		0.7			(0.2	)		0.3			0.3			(0.3	)		(0.4	)
Amortization of actuarial gain		(1.6	)		(2.0	)		(0.5	)		(1.5	)		(2.0	)		(0.5	)		—			—			—
Subtotal		(3.4	)		(7.0	)		(0.4	)		(1.0	)		(3.6	)		2.4			(2.4	)		(3.5	)		(3.0	)
Regulatory adjustment		13.2			16.0			10.0			15.0			17.7			11.7			(1.8	)		(1.8	)		(1.8	)
Net postretirement benefit cost	$	9.8		$	9.0		$	9.6		$	14.0		$	14.1		$	14.1		$	(4.2	)	$	(5.3	)	$	(4.8	)

Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income

Other changes in plan assets and postretirement benefit obligations recognized in OCI include the following:

	Spire									Spire Missouri									Spire Alabama
	2021			2020			2019			2021			2020			2019			2021			2020			2019
Current year actuarial (gain) loss	$	(41.0	)	$	(7.3	)	$	(12.2	)	$	(29.0	)	$	(7.6	)	$	(17.3	)	$	(9.9	)	$	1.1		$	5.5
Amortization of actuarial gain		1.6			2.0			0.5			1.5			2.0			0.5			—			—			—
Current year prior service credit		—			15.8			5.5			—			9.5			4.9			—			6.3			0.6
Amortization of current year service cost		—			—			0.4			—			—			—			—			—			0.4
Amortization of prior service (cost) credit		(1.0	)		0.5			(0.3	)		(0.7	)		0.2			(0.3	)		(0.3	)		0.3			—
Subtotal		(40.4	)		11.0			(6.1	)		(28.2	)		4.1			(12.2	)		(10.2	)		7.7			6.5
Regulatory adjustment		40.4			(11.0	)		6.1			28.2			(4.1	)		12.2			10.2			(7.7	)		(6.5	)
Total recognized in OCI	$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—

Reconciliation of the Beginning and Ending Balances of Benefit Obligation

The following table sets forth the reconciliation of the beginning and ending balances of the postretirement benefit obligation at September 30:

	Spire						Spire Missouri						Spire Alabama
	2021			2020			2021			2020			2021			2020
Benefit obligation, beginning of year	$	212.3		$	197.3		$	158.4		$	147.9		$	48.3		$	43.4
Service cost		7.3			5.9			6.2			5.3			0.9			0.4
Interest cost		6.0			6.3			4.5			4.7			1.3			1.4
Actuarial (gain) loss		(7.5	)		0.2			(6.7	)		1.7			0.7			(0.7	)
Plan amendments		—			15.8			—			9.5			—			6.3
Benefits paid		(13.9	)		(13.2	)		(10.7	)		(10.7	)		(3.2	)		(2.5	)
Benefit obligation, end of year	$	204.2		$	212.3		$	151.7		$	158.4		$	48.0		$	48.3

Fair Value of Plan Assets

The following table sets forth the reconciliation of the beginning and ending balances of the fair value of plan assets at September 30:

	Spire						Spire Missouri						Spire Alabama
	2021			2020			2021			2020			2021			2020
Fair value of plan assets at beginning of year	$	291.0		$	279.8		$	199.2		$	188.9		$	87.0		$	86.4
Actual return on plan assets		49.7			24.2			33.1			20.8			15.6			3.1
Employer contributions		0.1			0.2			0.1			0.2			—			—
Benefits paid		(13.9	)		(13.2	)		(10.7	)		(10.7	)		(3.2	)		(2.5	)
Fair value of plan assets, end of year	$	326.9		$	291.0		$	221.7		$	199.2		$	99.4		$	87.0
Funded status of plans, end of year	$	122.7		$	78.7		$	70.0		$	40.8		$	51.4		$	38.7

Amounts Recognized in Consolidated Balance Sheets

The following table sets forth the amounts recognized in the balance sheets at September 30:

	Spire						Spire Missouri						Spire Alabama
	2021			2020			2021			2020			2021		2020
Noncurrent assets	$	170.2		$	129.0		$	117.5		$	90.3		$	51.4	$	38.7
Current liabilities		(0.5	)		(0.5	)		(0.5	)		(0.5	)		—		—
Noncurrent liabilities		(47.0	)		(49.8	)		(47.0	)		(49.0	)		—		—
Total	$	122.7		$	78.7		$	70.0		$	40.8		$	51.4	$	38.7

Pre-tax Amounts Expected to Amortized From Accumulated Other Comprehensive Loss Into Net Periodic Pension Cost

Pre-tax amounts recognized in accumulated other comprehensive loss not yet recognized as components of net periodic postretirement benefit cost consist of:

	Spire						Spire Missouri						Spire Alabama
	2021			2020			2021			2020			2021			2020
Net actuarial gain	$	(101.2	)	$	(61.7	)	$	(85.8	)	$	(58.3	)	$	(11.5	)	$	(1.5	)
Prior service (credit) cost		14.6			15.5			9.7			10.4			4.9			5.1
Subtotal		(86.6	)		(46.2	)		(76.1	)		(47.9	)		(6.6	)		3.6
Adjustments for amounts included in regulatory assets		86.6			46.2			76.1			47.9			6.6			(3.6	)
Total	$	—		$	—		$	—		$	—		$	—		$	—

Assumptions Used to Calculate Net Periodic Cost and Benefit Obligations

The assumptions used to calculate net periodic postretirement benefit costs for Spire Missouri are as follows:

	2021	2020	2019
Weighted average discount rate - Spire Missouri plans	2.75%	3.15%	4.30%
Weighted average rate of future compensation increase	3.00%	3.00%	3.00%
Expected long-term rate of return on plan assets - Spire Missouri plans	5.75%	6.25%	6.25%

The assumptions used to calculate net periodic postretirement benefit costs for Spire Alabama are as follows:

	2021	2020	2019
Weighted average discount rate	2.75%	3.15%	4.30%
Expected long-term rate of return on plan assets	5.00%/6.25%	5.00%/6.25%	5.00%/6.25%

The assumptions used to calculate the accumulated postretirement benefit obligations are as follows:

	2021	2020
Weighted average discount rate - Spire Alabama plans	2.95%	2.75%
Weighted average discount rate - Spire Missouri plans	2.95%	2.75%
Weighted average rate of future compensation increase - Spire Missouri East plans	3.00%	3.00%

Targeted and Actual Plan Assets by Category

Following are the targeted and actual plan assets by category as of September 30 of each year for Spire Missouri and Spire Alabama:

Spire Missouri	Target			2021 Actual			2020 Actual
Equity securities		60.0	%		59.2	%		57.4	%
Debt securities		40.0	%		38.9	%		37.8	%
Other (cash and cash equivalents held to make benefit payments)		—	%		1.9	%		4.8	%
Total		100.0	%		100.0	%		100.0	%

Spire Alabama	Target			2021 Actual			2020 Actual
Equity securities		60.0	%		60.5	%		61.8	%
Debt securities		40.0	%		39.5	%		38.2	%
Total		100.0	%		100.0	%		100.0	%

Expected Benefit Payments for Succeeding Five Fiscal Years

Following are expected postretirement benefit payments for the succeeding five fiscal years, and in aggregate for the five fiscal years thereafter for Spire, Spire Missouri, and Spire Alabama:

	2022		2023		2024		2025		2026		2027- 2031
Spire	$	14.1	$	14.9	$	15.6	$	15.9	$	15.8	$	76.1
Spire Missouri		11.2		11.9		12.5		12.7		12.7		59.9
Spire Alabama		2.7		2.8		2.9		2.9		2.9		14.3

Schedule of Assumed Medical Cost Trend Rates

The assumed medical cost trend rates at September 30 are as follows:

	2021	2020
Medical cost trend assumed for next year - Spire Missouri	7.00%	6.50%
Medical cost trend assumed for next year - Spire Alabama	7.00%	6.50%
Rate to which the medical cost trend rate is assumed to decline    (the ultimate medical cost trend rate)	5.00%	5.00%
Year the rate reaches the ultimate trend	2028	2025