PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)

12 Months Ended

Sep. 30, 2016

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, 2016
Cash and cash equivalents	$	51.2		$	—	$	—	$	51.2
Stock/bond mutual fund	99.3			26.7		0.1		126.1
Debt Securities
US bond mutual funds	23.0			126.0		—		149.0
US government	42.1			3.0		—		45.1
US corporate	137.4			—		—		137.4
US municipal	6.3			—		—		6.3
International	25.3			—		—		25.3
Derivatives and margin (payable)	(1.0		)	1.1		—		0.1
Total	$	383.6		$	156.8	$	0.1	$	540.5
As of September 30, 2015
Cash and cash equivalents	$	43.4		$	0.2	$	—	$	43.6
Stock/bond mutual fund	46.4			74.6		9.6		130.6
Debt Securities
US bond mutual funds	—			9.3		—		9.3
US government	58.7			—		—		58.7
US corporate	123.7			42.9		—		166.6
US municipal	—			5.9		—		5.9
International	—			31.3		—		31.3
Derivative instruments	—			2.9		—		2.9
Total	$	272.2		$	167.1	$	9.6	$	448.9

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, 2016
Cash and cash equivalents	$	4.8	$	—	$	—	$	4.8
US stock/bond mutual fund	157.9		68.5		—		226.4
International fund	0.9		14.3		—		15.2
Total	$	163.6	$	82.8	$	—	$	246.4
As of September 30, 2015
Cash and cash equivalents	$	1.6	$	—	$	—	$	1.6
US stock/bond mutual fund	115.5		92.8		—		208.3
International fund	—		13.4		—		13.4
Total	$	117.1	$	106.2	$	—	$	223.3

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									Laclede Gas									Alagasco
	2016			2015			2014			2016			2015			2014			2016			2015			2014*
Service cost – benefits earned during the period	$	15.3		$	17.3		$	10.2		$	10.0		$	11.5		$	9.7		$	5.3		$	5.8		$	5.1
Interest cost on projected benefit obligation	28.0			29.5			24.5			21.7			23.3			24.0			6.3			6.2			4.1
Expected return on plan assets	(34.9		)	(37.4		)	(27.2		)	(26.7		)	(29.2		)	(26.5		)	(8.2		)	(8.2		)	(5.2		)
Amortization of other comprehensive income	—			—			0.4			—			—			—			—			—			—
Amortization of prior service cost	0.4			0.5			0.5			0.4			0.5			0.5			—			—			0.1
Amortization of actuarial loss	8.0			7.5			7.1			7.9			7.5			7.1			0.1			—			2.2
Loss on lump-sum settlements	3.3			19.6			1.5			—			18.0			1.5			3.3			1.6			10.1
Special termination benefits	1.6			—			—			1.6			—			—			—			—			—
Subtotal	21.7			37.0			17.0			14.9			31.6			16.3			6.8			5.4			16.4
Regulatory adjustment	17.8			(2.1		)	10.4			11.7			(5.2		)	10.4			6.1			3.1			0.4
Net pension cost	$	39.5		$	34.9		$	27.4		$	26.6		$	26.4		$	26.7		$	12.9		$	8.5		$	16.8
													* Nine months ended September 30

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 (OCI) include the following:

	Spire									Laclede Gas									Alagasco
	2016			2015			2014			2016			2015			2014			2016			2015			2014*
Current year actuarial loss	$	46.8		$	48.3		$	15.7		$	21.6		$	26.0		$	14.2		$	25.2		$	22.3		$	1.5
Amortization of actuarial loss	(8.0		)	(7.5		)	(7.1		)	(7.9		)	(7.5		)	(7.1		)	(0.1		)	—			—
Acceleration of loss recognized due to settlement	(3.3		)	(19.6		)	(1.5		)	—			(18.0		)	(1.5		)	(3.3		)	(1.6		)	—
Amortization of current year service cost	5.0			—			—			5.0			—			—			—			—			—
Amortization of prior service cost	(0.4		)	(0.5		)	(0.5		)	(0.4		)	(0.5		)	(0.5		)	—			—			—
Subtotal	40.1			20.7			6.6			18.3			—			5.1			21.8			20.7			1.5
Regulatory adjustment	(39.8		)	(21.2		)	(6.1		)	(18.0		)	(0.5		)	(4.7		)	(21.8		)	(20.7		)	(1.5		)
Total recognized in OCI	$	0.3		$	(0.5	)	$	0.5		$	0.3		$	(0.5	)	$	0.4		$	—		$	—		$	—
													* Nine months ended September 30

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						Laclede Gas						Alagasco
	2016			2015			2016			2015			2016			2015
Benefit obligation, beginning of year	$	652.3		$	692.4		$	497.6		$	543.6		$	154.7		$	148.8
Service cost	15.3			17.3			10.0			11.5			5.3			5.8
Interest cost	28.0			29.5			21.7			23.3			6.3			6.2
Actuarial loss (gain)	85.8			(12.8		)	59.2			(20.7		)	26.6			7.9
Plan amendments	5.1			—			5.1			—			—			—
EnergySouth acquisition	60.4			—			—			—			—			—
Settlement loss	1.1			16.5			—			14.5			1.1			2.0
Special termination benefits	1.6			—			1.6			—			—			—
Settlement benefits paid	(16.6		)	(71.1		)	—			(58.2		)	(16.6		)	(12.9		)
Regular benefits paid	(38.3		)	(19.5		)	(35.2		)	(16.4		)	(3.1		)	(3.1		)
Benefit obligation, end of year	$	794.7		$	652.3		$	560.0		$	497.6		$	174.3		$	154.7
Accumulated benefit obligation, end of year	724.5			$	591.4		517.7			$	456.9		149.8			$	134.5

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						Laclede Gas						Alagasco
	2016			2015			2016			2015			2016			2015
Fair value of plan assets, beginning of year	$	448.9		$	506.6		$	339.9		$	387.4		$	109.0		$	119.2
Actual return on plan assets	75.1			(7.2		)	64.4			(3.0		)	10.7			(4.2		)
Employer contributions	26.6			40.1			26.6			30.1			—			10.0
EnergySouth acquisition	44.8			—			—			—			—			—
Settlement benefits paid	(16.6		)	(71.1		)	—			(58.2		)	(16.6		)	(12.9		)
Regular benefits paid	(38.3		)	(19.5		)	(35.2		)	(16.4		)	(3.1		)	(3.1		)
Fair value of plan assets, end of year	$	540.5		$	448.9		$	395.7		$	339.9		$	100.0		$	109.0
Funded status of plans, end of year	$	(254.2	)	$	(203.4	)	$	(164.3	)	$	(157.7	)	$	(74.3	)	$	(45.7	)

Amounts recognized in consolidated balance sheets

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

	Spire						Laclede Gas						Alagasco
	2016			2015			2016			2015			2016			2015
Current liabilities	$	(0.6	)	$	(0.5	)	$	(0.6	)	$	(0.5	)	$	—		$	—
Noncurrent liabilities	(253.6		)	(202.9		)	(163.7		)	(157.2		)	(74.3		)	(45.7		)
Total	$	(254.2	)	$	(203.4	)	$	(164.3	)	$	(157.7	)	$	(74.3	)	$	(45.7	)

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

	Spire						Laclede Gas						Alagasco
	2016			2015			2016			2015			2016			2015
Net actuarial loss	$	179.4		$	143.9		$	135.5		$	121.9		$	43.9		$	22.0
Prior service costs	8.2			3.5			8.2			3.5			—			—
Subtotal	187.6			147.4			143.7			125.4			43.9			22.0
Adjustments for amounts included in regulatory assets	(184.8		)	(144.9		)	(140.9		)	(122.9		)	(43.9		)	(22.0		)
Total	$	2.8		$	2.5		$	2.8		$	2.5		$	—		$	—

Pre-tax amounts amortized from accumulated other comprehensive income into net periodic cost

At September 30, 2016, the following pre-tax amounts are expected to be amortized from accumulated other comprehensive loss into net periodic pension cost during fiscal year 2017:

	Spire			Laclede Gas			Alagasco
Amortization of net actuarial loss	$	13.5		$	11.6		$	1.9
Amortization of prior service cost	1.0			1.0			—
Subtotal	14.5			12.6			1.9
Regulatory adjustment	(14.2		)	(12.3		)	(1.9		)
Total	$	0.3		$	0.3		$	—

Assumptions used to calculate net periodic cost and benefit obligations.

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

	2016	2015
Weighted average discount rate - Laclede Gas division	3.50%	4.40%
Weighted average discount rate - MGE division	3.50%	4.50%
Weighted average discount rate - Alagasco	3.45%/3.50%	4.25%/4.30%
Weighted average rate of future compensation increase - Laclede Gas, Alagasco and MGE	3.00%	3.00%

The assumptions used to calculate net periodic pension costs for Laclede Gas are as follows:

	2016	2015	2014
Weighted average discount rate - Laclede Gas division plans	4.40%	4.30%	4.70%
Weighted average discount rate - MGE division plans	4.50%	4.45%	5.00%
Weighted average rate of future compensation increase *	3.00%	3.00%	3.00%
Expected long-term rate of return on plan assets *	7.75%	7.75%	7.75%

* Assumptions for weighted average rate of future compensation increase and expected long-term rate of return on plan assets are the same for both Laclede Gas and MGE plans.

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

	2016	2015	2014*
Weighted average discount rate	4.25% /4.30%	4.15% /4.25%	4.00% / 4.05%
Weighted average rate of future compensation increase	3.00%	2.92%	2.92%
Expected long-term rate of return on plan assets	7.50%	7.00% / 7.25%	7.00% / 7.25%

* Nine-month transition period ended September 30

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 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				Laclede Gas				Alagasco
	2016		2015		2016		2015		2016		2015
Projected benefit obligation	$	794.8	$	652.3	$	560.0	$	497.6	$	174.3	$	154.7
Accumulated benefit obligation	724.5		591.4		517.7		456.9		149.8		134.5
Fair value of plan assets	540.5		448.9		395.7		339.9		100.0		109.0

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 Laclede Gas and Alagasco:

Laclede Gas	2016 Target		2016 Actual		2015 Target		2015 Actual
Equity markets	56.2	%	56.9	%	52.0	%	48.4	%
Debt securities	43.8	%	43.1	%	48.0	%	50.1	%
Other*	—	%	—	%	—	%	1.5	%
Total	100.0	%	100.0	%	100.0	%	100.0	%

* Other investments in 2016 and 2015 consisted of cash equivalents.

Alagasco	2016 Target		2016 Actual		2015 Target		2015 Actual
Equity markets	60.0	%	59.2	%	60.0	%	52.9	%
Debt securities	29.0	%	28.8	%	29.0	%	27.9	%
Other*	11.0	%	12.0	%	11.0	%	19.2	%
Total	100.0	%	100.0	%	100.0	%	100.0	%

* Other investments in 2016 included cash, real estate, commodities, natural resources and TIPS. In 2015, this included cash and cash equivalents, hedge funds, real estate, and all asset funds, which can invest in equities or fixed income.

Expected benefit payments for the succeeding five fiscal years

Following are expected pension benefit payments for the succeeding five fiscal years, and in aggregate for the five years thereafter, for Spire, Laclede Gas, and Alagasco:

	2017		2018		2019		2020		2021		2022- 2026
Spire	$	61.3	$	56.2	$	57.1	$	56.6	$	56.8	$	286.3
Laclede Gas	48.2		43.3		43.5		42.2		40.4		196.6
Alagasco	10.9		10.6		11.2		11.9		13.7		74.5

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									Laclede Gas									Alagasco
	2016			2015			2014			2016			2015			2014			2016			2015			2014*
Service cost – benefits earned during the period	$	10.9		$	12.8		$	11.3		$	10.6		$	12.3		$	11.2		$	0.3		$	0.5		$	0.4
Interest cost on accumulated postretirement benefit obligation	10.2			11.2			8.9			8.1			8.6			8.7			2.1			2.6			1.9
Expected return on plan assets	(13.5		)	(13.2		)	(7.3		)	(8.5		)	(8.1		)	(6.8		)	(5.0		)	(5.1		)	(3.6		)
Amortization of prior other comprehensive loss	—			—			(0.2		)	—			—			—			—			—			—
Amortization of prior service cost	0.3			0.8			—			0.3			0.8			—			—			—			—
Amortization of actuarial loss (gain)	3.6			5.1			6.0			3.8			5.1			6.0			(0.2		)	—			(1.0		)
Special termination benefits	2.6			—			—			2.6			—			—			—			—			—
Subtotal	14.1			16.7			18.7			16.9			18.7			19.1			(2.8		)	(2.0		)	(2.3		)
Regulatory adjustment	(6.6		)	(11.0		)	(9.6		)	(4.8		)	(9.2		)	(9.6		)	(1.8		)	(1.8		)	(0.2		)
Net postretirement benefit cost	$	7.5		$	5.7		$	9.1		$	12.1		$	9.5		$	9.5		$	(4.6	)	$	(3.8	)	$	(2.5	)
													* Nine months ended September 30

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									Laclede Gas									Alagasco
	2016			2015			2014			2016			2015			2014			2016			2015			2014*
Current year actuarial loss (gain)	$	0.8		$	(8.5	)	$	(3.1	)	$	1.4		$	(2.4	)	$	(4.2	)	$	(0.6	)	$	(6.1	)	$	1.1
Amortization of actuarial (loss) gain	(3.6		)	(5.1		)	(6.0		)	(3.8		)	(5.1		)	(6.0		)	0.2			—			—
Amortization of prior service (cost) credit	(0.3		)	(0.8		)	2.5			(0.3		)	(0.8		)	2.5			—			—			—
Current year prior service credit	(1.8		)	(4.9		)	—			—			(4.9		)	—			(1.8		)	—			—
Subtotal	(4.9		)	(19.3		)	(6.6		)	(2.7		)	(13.2		)	(7.7		)	(2.2		)	(6.1		)	1.1
Regulatory adjustment	4.9			19.3			6.6			2.7			13.2			7.7			2.2			6.1			(1.1		)
Total recognized in OCI	$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—		$	—
													* Nine months ended September 30

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						Laclede Gas						Alagasco
	2016			2015			2016			2015			2016			2015
Benefit obligation, beginning of year	$	239.2		$	258.5		$	191.9		$	197.9		$	47.3		$	60.6
Service cost	10.9			12.8			10.6			12.3			0.3			0.5
Interest cost	10.2			11.2			8.1			8.6			2.1			2.6
Actuarial loss (gain)	7.1			(23.7		)	6.7			(10.9		)	0.4			(12.8		)
Plan amendments	(1.8		)	(4.9		)	—			(4.9		)	(1.8		)	—
EnergySouth acquisition	5.9			—			—			—			—			—
Special termination benefits	2.6			—			2.6			—			—			—
Retiree drug subsidy program	0.2			0.4			—			—			0.2			0.4
Gross benefits paid	(15.1		)	(15.1		)	(12.0		)	(11.1		)	(3.1		)	(4.0		)
Benefit obligation, end of year	$	259.2		$	239.2		$	207.9		$	191.9		$	45.4		$	47.3

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						Laclede Gas						Alagasco
	2016			2015			2016			2015			2016			2015
Fair value of plan assets at beginning of year	$	223.3		$	222.5		$	143.6		$	137.2		$	79.7		$	85.3
Actual return on plan assets	19.9			(2.0		)	13.8			(0.4		)	6.2			(1.6		)
Employer contributions	14.3			17.9			14.3			17.9			—			—
EnergySouth acquisition	4.0			—			—			—			—			—
Gross benefits paid	(15.1		)	(15.1		)	(12.0		)	(11.1		)	(3.1		)	(4.0		)
Fair value of plan assets, end of year	$	246.4		$	223.3		$	159.7		$	143.6		$	82.8		$	79.7
Funded status of plans, end of year	$	(12.8	)	$	(15.9	)	$	(48.2	)	$	(48.3	)	$	37.4		$	32.4

Amounts recognized in consolidated balance sheets

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

	Spire						Laclede Gas						Alagasco
	2016			2015			2016			2015			2016		2015
Current assets	$	0.3		$	—		$	0.3		$	—		$	—	$	—
Noncurrent assets	37.4			35.5			—			3.1			37.4		32.4
Current liabilities	(0.4		)	(0.3		)	(0.4		)	(0.3		)	—		—
Noncurrent liabilities	(50.1		)	(51.1		)	(48.1		)	(51.1		)	—		—
Total	$	(12.8	)	$	(15.9	)	$	(48.2	)	$	(48.3	)	$	37.4	$	32.4

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

	Spire						Laclede Gas						Alagasco
	2016			2015			2016			2015			2016			2015
Net actuarial loss	$	38.0		$	40.8		$	43.4		$	45.8		$	(5.4	)	$	(5.0	)
Prior service credit	(5.2		)	(3.1		)	(3.4		)	(3.1		)	(1.8		)	—
Subtotal	32.8			37.7			40.0			42.7			(7.2		)	(5.0		)
Adjustments for amounts included in regulatory assets	(32.8		)	(37.7		)	(40.0		)	(42.7		)	7.2			5.0
Total	$	—		$	—		$	—		$	—		$	—		$	—

Pre-tax amounts amortized from accumulated other comprehensive income into net periodic cost

At September 30, 2016, the following pre-tax amounts are expected to be amortized from accumulated other comprehensive loss into net periodic postretirement benefit cost during fiscal year 2017:

	Spire			Laclede Gas			Alagasco
Amortization of net actuarial loss (gain)	$	2.4		$	2.5		$	(0.1	)
Amortization of prior service cost	0.1			0.3			(0.2		)
Subtotal	2.5			2.8			(0.3		)
Regulatory adjustment	(2.5		)	(2.8		)	0.3
Total	$	—		$	—		$	—

Assumptions used to calculate net periodic cost and benefit obligations.

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

	2016		2015
Weighted average discount rate - Laclede Gas division plans	3.15	%	4.00	%
Weighted average discount rate - MGE division plans	3.45	%	4.30	%
Weighted average rate of future compensation increase	3.00	%	3.00	%

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

	2016		2015
Weighted average discount rate	3.60	%	4.50	%
Weighted average rate of future compensation increase	n/a		n/a

The assumptions used to calculate net periodic postretirement benefit costs for Laclede Gas are as follows:

	2016		2015		2014
Weighted average discount rate Laclede Gas division plans	4.00	%	4.15	%	4.60	%
Weighted average discount rate MGE division plans	4.30	%	4.40	%	4.95	%
Weighted average rate of future compensation increase - Laclede Gas plans	3.00	%	3.00	%	3.00	%
Expected long-term rate of return on plan assets - Laclede Gas division plans	6.00% / 7.75%		6.25% / 7.75%		6.25% / 7.75%
Expected long-term rate of return on plan assets - MGE division plans	4.75	%	5.00	%	3.75% / 5.75%

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

	2016		2015		2014
Weighted average discount rate	4.50	%	4.40	%	4.25	%
Weighted average rate of future compensation increase	n/a		n/a		2.92	%
Expected long-term rate of return on plan assets	4.50% / 7.25%		4.75% / 7.50%		4.75% / 7.25%

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 Laclede Gas and Alagasco:

Laclede Gas	Target		2016 Actual		2015 Actual
Equity securities	60.0	%	59.1	%	59.6	%
Debt securities	40.0	%	39.4	%	39.7	%
Other (cash and cash equivalents)	—	%	1.5	%	0.7	%
Total	100.0	%	100.0	%	100.0	%

Alagasco	Target		2016 Actual		2015 Actual
Equity securities	60.0	%	60.5	%	59.7	%
Debt securities	40.0	%	39.5	%	40.3	%
Total	100.0	%	100.0	%	100.0	%

Expected benefit payments for the succeeding five fiscal years

Following are expected postretirement benefit payments for the succeeding five fiscal years, and in aggregate for the five years thereafter for Spire, Laclede Gas, and Alagasco:

	2017		2018		2019		2020		2021		2022- 2026
Spire	$	15.4	$	16.7	$	17.9	$	19.1	$	20.1	$	108.6
Laclede Gas	12.3		13.7		14.8		15.8		16.8		92.5
Alagasco	2.9		2.8		2.8		2.9		2.9		14.1

Assumed medical cost trend rates and effect of an assumed 1% changed in assumed medical cost trend.

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

	2016		2015
Medical cost trend assumed for next year - Laclede Gas	7.50	%	7.00	%
Medical cost trend assumed for next year - Alagasco	7.50	%	7.00	%
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	2023		2020

The following table presents the effects of an assumed 1% change in the assumed medical cost trend rate:

	Spire					Laclede Gas					Alagasco
	1% Increase		1% Decrease			1% Increase		1% Decrease			1% Increase		1% Decrease
Net periodic postretirement benefit cost	$	1.5	$	(1.4	)	$	1.5	$	(1.4	)	$	—	$	—
Accumulated postretirement benefit obligation	11.0		(10.2		)	9.0		(8.4		)	1.3		(1.2		)

Laclede Gas

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 Laclede Gas’ 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, 2016
Cash and cash equivalents	$	46.5		$	—	$	—	$	46.5
Stock/bond mutual fund	—			14.8		0.1		14.9
Debt Securities
US bond mutual funds	—			120.2		—		120.2
US government	42.1			3.0		—		45.1
US corporate	137.4			—		—		137.4
US municipal	6.3			—		—		6.3
International	25.2			—		—		25.2
Derivatives and margin (payable)	(1.0		)	1.1		—		0.1
Total	$	256.5		$	139.1	$	0.1	$	395.7
As of September 30, 2015
Cash and cash equivalents	$	31.8		$	—	$	—	$	31.8
Stock/bond mutual funds	—			67.6		0.1		67.7
Debt Securities
US government	37.7			—		—		37.7
US corporate	123.7			42.9		—		166.6
US municipal	—			5.9		—		5.9
International	—			27.3		—		27.3
Derivative instruments	—			2.9		—		2.9
Total	$	193.2		$	146.6	$	0.1	$	339.9

The table below categorizes the fair value measurements of Laclede Gas’ 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, 2016
Cash and cash equivalents	$	4.6	$	—	$	—	$	4.6
US stock/bond mutual funds	155.1		—		—		155.1
Total	$	159.7	$	—	$	—	$	159.7
As of September 30, 2015
Cash and cash equivalents	$	1.6	$	—	$	—	$	1.6
US stock/bond mutual funds	115.5		26.5		—		142.0
Total	$	117.1	$	26.5	$	—	$	143.6

Alagasco

The table below categorizes the fair value measurements of Alagasco’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, 2016
Cash and cash equivalents	$	0.4	$	—	$	—	$	0.4
Stock/bond mutual funds	59.0		11.9		—		70.9
Debt Securities
US bond mutual funds	23.0		5.7		—		28.7
Total	$	82.4	$	17.6	$	—	$	100.0
As of September 30, 2015
Cash and cash equivalents	$	11.6	$	0.2	$	—	$	11.8
Stock/bond mutual fund	46.4		7.0		9.5		62.9
Debt Securities
US bond mutual funds	—		9.3		—		9.3
US government	—		21.0		—		21.0
International	—		4.0		—		4.0
Derivative instruments (b)	—		—		—		—
Total	$	58.0	$	41.5	$	9.5	$	109.0

The table below categorizes the fair value measurements of Alagasco’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, 2016
US stock/bond mutual fund	$	—	$	68.5	$	—	$	68.5
International fund	—		14.3		—		14.3
Total	$	—	$	82.8	$	—	$	82.8
As of September 30, 2015
US stock/bond mutual fund	—		66.3		—		66.3
International fund	—		13.4		—		13.4
Total	$	—	$	79.7	$	—	$	79.7