CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Net Income	$ 108.0	$ 100.8	$ 153.2	$ 147.7
Cash flow hedging derivative instruments:
Net hedging gains (losses) arising during the period	1.0	(0.6)	12.5	(1.3)
Reclassification adjustment for (gains) losses included in net income	(0.1)	0.5	0.1	1.7
Net unrealized gains (losses) on cash flow hedging derivative instruments	0.9	(0.1)	12.6	0.4
Net gains on defined benefit pension and other postretirement plans	0.0	0.0	0.1	0.1
Net unrealized losses (gains) on available for sale securities	0.0	0.1	(0.1)	0.0
Other Comprehensive Income (Loss), Before Tax	0.9	0.0	12.6	0.5
Income Tax Expense Related to Items of Other Comprehensive Income	0.4	0.0	4.7	0.2
Other Comprehensive Income (Loss), Net of Tax	0.5	0.0	7.9	0.3
Comprehensive Income	108.5	100.8	161.1	148.0
Laclede Gas
Net Income	57.0	54.3	95.0	93.7
Cash flow hedging derivative instruments:
Other Comprehensive Income (Loss), Net of Tax	(0.2)	0.1	0.0	0.2
Comprehensive Income	$ 56.8	$ 54.4	$ 95.0	$ 93.9