PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)

9 Months Ended

Jun. 30, 2015

Pension Plans

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

Net Periodic Cost

The net periodic pension cost included the following components:

	Three Months Ended   June 30,						Nine Months Ended   June 30,
($ Millions)	2015			2014			2015			2014
Laclede Group
Service cost – benefits earned during the period	$	4.4		$	2.4		$	13.0		$	7.3
Interest cost on projected benefit obligation	7.4			6.0			22.3			18.0
Expected return on plan assets	(9.4		)	(6.6		)	(28.1		)	(19.9		)
Amortization of prior service cost	0.1			0.2			0.3			0.4
Amortization of actuarial loss	1.8			1.8			5.7			5.3
Loss on lump-sum settlements	12.5			—			12.5			1.3
Sub-total	16.8			3.8			25.7			12.4
Regulatory adjustment	(6.3		)	2.9			3.4			7.4
Net pension cost	$	10.5		$	6.7		$	29.1		$	19.8

Postretirement Plans

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

Net Periodic Cost

Net periodic postretirement benefit cost for the Company consisted of the following components:

	Three Months Ended   June 30,						Nine Months Ended   June 30,
($ Millions)	2015			2014			2015			2014
Laclede Group
Service cost – benefits earned during the period	$	3.2		$	2.8		$	9.6		$	8.4
Interest cost on accumulated postretirement benefit obligation	2.8			2.1			8.4			6.5
Expected return on plan assets	(3.3		)	(1.7		)	(9.9		)	(5.1		)
Amortization of prior service credit	0.2			—			0.6			—
Amortization of actuarial loss	1.3			1.5			3.8			4.5
Sub-total	4.2			4.7			12.5			14.3
Regulatory adjustment	(2.8		)	(2.4		)	(8.2		)	(7.2		)
Net postretirement benefit cost	$	1.4		$	2.3		$	4.3		$	7.1

Laclede Gas | Pension Plans

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

Net Periodic Cost

Laclede Gas
Service cost – benefits earned during the period	$	2.9		$	2.4		$	8.6		$	7.3
Interest cost on projected benefit obligation	5.8			6.0			17.6			18.0
Expected return on plan assets	(7.3		)	(6.6		)	(21.9		)	(19.9		)
Amortization of prior service cost	0.1			0.2			0.3			0.4
Amortization of actuarial loss	1.8			1.8			5.7			5.3
Loss on lump-sum settlements	12.5			—			12.5			1.3
Sub-total	15.8			3.8			22.8			12.4
Regulatory adjustment	(7.8		)	2.9			(1.0		)	7.4
Net pension cost	$	8.0		$	6.7		$	21.8		$	19.8

Laclede Gas | Postretirement Plans

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

Net Periodic Cost

	Three Months Ended   June 30,						Nine Months Ended   June 30,
($ Millions)	2015			2014			2015			2014
Laclede Gas
Service cost – benefits earned during the period	$	3.0		$	2.8		$	9.2		$	8.4
Interest cost on accumulated postretirement benefit obligation	2.2			2.1			6.5			6.5
Expected return on plan assets	(2.0		)	(1.7		)	(6.1		)	(5.1		)
Amortization of prior service cost	0.2			—			0.6			—
Amortization of actuarial loss	1.3			1.5			3.8			4.5
Sub-total	4.7			4.7			14.0			14.3
Regulatory adjustment	(2.3		)	(2.4		)	(6.9		)	(7.2		)
Net postretirement benefit cost	$	2.4		$	2.3		$	7.1		$	7.1

Alagasco | Pension Plans

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

Net Periodic Cost

	Three Months Ended   June 30,						Nine Months Ended   June 30,
($ Millions)	2015			2014			2015			2014
Alagasco
Service cost – benefits earned during the period	$	1.5		$	1.9		$	4.4		$	5.5
Interest cost on projected benefit obligation	1.6			1.5			4.7			4.4
Expected return on plan assets	(2.1		)	(1.9		)	(6.2		)	(5.6		)
Amortization of prior service cost	—			—			—			0.1
Amortization of actuarial loss	—			0.9			—			2.9
Loss on lump-sum settlements	—			—			—			10.9
Sub-total	1.0			2.4			2.9			18.2
Regulatory adjustment	1.5			0.3			4.4			(10.3		)
Net pension cost	$	2.5		$	2.7		$	7.3		$	7.9

Alagasco | Postretirement Plans

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

Net Periodic Cost

Alagasco
Service cost – benefits earned during the period	$	0.2		$	0.1		$	0.4		$	0.5
Interest cost on accumulated postretirement benefit obligation	0.6			0.7			1.9			1.9
Expected return on plan assets	(1.3		)	(1.3		)	(3.8		)	(3.4		)
Amortization of actuarial gain	—			(0.4		)	—			(0.9		)
Amortization of transition obligation	—			—			—			0.3
Sub-total	(0.5		)	(0.9		)	(1.5		)	(1.6		)
Regulatory adjustment	(0.5		)	—			(1.3		)	—
Net postretirement benefit income	$	(1.0	)	$	(0.9	)	$	(2.8	)	$	(1.6	)