CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Operating Revenues:
Gas Utility	$ 641.1	$ 611.5	$ 1,113.4	$ 1,010.3
Gas Marketing and other	22.3	(2.2)	45.1	(1.6)
Total Operating Revenues	663.4	609.3	1,158.5	1,008.7
Gas Utility
Natural and propane gas	254.3	261.1	448.1	409.6
Operation and maintenance	98.4	94.3	197.8	185.9
Depreciation and amortization	37.9	33.8	75.6	67.3
Taxes, other than income taxes	48.3	43.9	81.7	72.1
Total Gas Utility Operating Expenses	438.9	433.1	803.2	734.9
Gas Marketing and other	44.1	8.5	85.8	19.1
Total Operating Expenses	483.0	441.6	889.0	754.0
Operating Income	180.4	167.7	269.5	254.7
Other Income	3.6	0.8	4.1	2.2
Interest Charges:
Interest on long-term debt	19.2	16.7	38.3	33.6
Other interest charges	3.5	2.6	6.5	4.7
Total Interest Charges	22.7	19.3	44.8	38.3
Income Before Income Taxes	161.3	149.2	228.8	218.6
Income Tax Expense	53.3	48.4	75.6	70.9
Net Income	$ 108.0	$ 100.8	$ 153.2	$ 147.7
Weighted Average Number of Common Shares Outstanding:
Basic (in shares)	45.6	43.3	45.6	43.3
Diluted (in shares)	45.7	43.5	45.7	43.5
Basic Earnings Per Share of Common Stock (in dollars per share)	$ 2.36	$ 2.32	$ 3.35	$ 3.40
Diluted Earnings Per Share of Common Stock (in dollars per share)	2.36	2.31	3.34	3.39
Dividends Declared Per Share of Common Stock (in dollars per share)	$ 0.53	$ 0.49	$ 1.05	$ 0.98
Laclede Gas
Operating Revenues:
Gas Utility	$ 447.2	$ 446.7	$ 810.8	$ 763.9
Total Operating Revenues	447.2	446.7	810.8	763.9
Gas Utility
Natural and propane gas	241.2	242.8	432.5	392.6
Operation and maintenance	57.5	61.5	118.0	120.3
Depreciation and amortization	23.0	21.9	45.7	43.7
Taxes, other than income taxes	35.3	33.5	59.9	55.2
Total Operating Expenses	357.0	359.7	656.1	611.8
Operating Income	90.2	87.0	154.7	152.1
Other Income	1.9	0.4	2.0	1.2
Interest Charges:
Interest on long-term debt	8.2	8.2	16.5	16.6
Other interest charges	1.5	1.3	2.9	2.2
Total Interest Charges	9.7	9.5	19.4	18.8
Income Before Income Taxes	82.4	77.9	137.3	134.5
Income Tax Expense	25.4	23.6	42.3	40.8
Net Income	57.0	54.3	95.0	93.7
Alagasco
Operating Revenues:
Gas Utility	158.8	166.0	245.5	248.3
Total Operating Revenues	158.8	166.0	245.5	248.3
Gas Utility
Natural and propane gas	25.8	30.2	42.6	42.3
Operation and maintenance	31.5	33.1	62.7	66.2
Depreciation and amortization	12.3	11.9	24.6	23.6
Taxes, other than income taxes	10.3	10.4	16.9	16.9
Total Operating Expenses	79.9	85.6	146.8	149.0
Operating Income	78.9	80.4	98.7	99.3
Other Income	1.1	0.5	1.5	1.0
Interest Charges:
Interest on long-term debt	2.8	2.7	5.6	5.7
Other interest charges	0.7	0.8	1.5	1.3
Total Interest Charges	3.5	3.5	7.1	7.0
Income Before Income Taxes	76.5	77.4	93.1	93.3
Income Tax Expense	28.9	29.3	35.2	35.3
Net Income	$ 47.6	$ 48.1	$ 57.9	$ 58.0