CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Net income	$ 144.2	$ 136.9	$ 84.6
Cash flow hedging derivative instruments:
Net hedging loss arising during the period	(4.0)	(5.5)	(4.5)
Reclassification adjustment for loss included in net income	1.1	4.4	2.5
Net unrealized loss on cash flow hedging derivative instruments	(2.9)	(1.1)	(2.0)
Defined benefit pension and other postretirement benefit plans:
Net actuarial gain arising during the period	0.0	0.1	0.0
Amortization of actuarial (gain) loss included in net periodic pension and postretirement benefit cost	(0.3)	0.4	0.5
Net defined benefit pension and other postretirement benefit plans	(0.3)	0.5	0.5
Other Comprehensive Loss, Before Tax	(3.2)	(0.6)	(1.5)
Income Tax Benefit Related to Items of Other Comprehensive Loss	(1.0)	(0.3)	(0.6)
Other Comprehensive Loss, Net of Tax	(2.2)	(0.3)	(0.9)
Comprehensive Income	142.0	136.6	83.7
Laclede Gas
Net income	105.9	105.3	90.1
Cash flow hedging derivative instruments:
Net hedging loss arising during the period	0.0	(1.2)	0.1
Reclassification adjustment for loss included in net income	0.5	0.9	(0.2)
Net unrealized loss on cash flow hedging derivative instruments	0.5	(0.3)	(0.1)
Defined benefit pension and other postretirement benefit plans:
Net actuarial gain arising during the period	0.0	0.1	0.0
Amortization of actuarial (gain) loss included in net periodic pension and postretirement benefit cost	(0.3)	0.4	0.4
Net defined benefit pension and other postretirement benefit plans	(0.3)	0.5	0.4
Loss on available for sale securities	(0.1)	0.0	0.0
Other Comprehensive Loss, Before Tax	0.1	0.2	0.3
Income Tax Benefit Related to Items of Other Comprehensive Loss	0.2	0.0	0.1
Other Comprehensive Loss, Net of Tax	(0.1)	0.2	0.2
Comprehensive Income	$ 105.8	$ 105.5	$ 90.3