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CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Millions | Dec. 31, 2016 | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Assets |  |  |
Non-utility property, accumulated depreciation and amortization | $ 8.2 | $ 8.1 | $ 7.7
Capitalization: |  |  |
Common stock, par value (in dollars per share) | $ 1.00 | $ 1.00 | $ 1.00
Common stock, authorized (in shares) | 70,000,000.0 | 70,000,000.0 | 70,000,000.0
Common stock, issued (in shares) | 45,700,000 | 45,600,000 | 43,400,000
Common stock, outstanding (in shares) | 45,700,000 | 45,600,000 | 43,400,000
Laclede Gas |  |  |
Capitalization: |  |  |
Common stock, par value (in dollars per share) | $ 1.00 | $ 1.00 | $ 1.00
Common stock, authorized (in shares) | 50,000 | 50,000 | 50,000
Common stock, issued (in shares) | 24,577 | 24,577 | 24,577
Common stock, outstanding (in shares) | 24,577 | 24,577 | 24,577
Alagasco |  |  |
Capitalization: |  |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01
Common stock, authorized (in shares) | 3,000,000 | 3,000,000 | 3,000,000.0
Common stock, issued (in shares) | 2,000,000 | 2,000,000 | 2,000,000
Common stock, outstanding (in shares) | 2,000,000 | 2,000,000 | 2,000,000

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