Summary of Significant Accounting Policies - Redeemable Non-Controlling Interest (Details) |
Dec. 31, 2018
fund
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|---|---|
| Accounting Policies [Abstract] | |
| Investment funds formed to fund the purchase of solar energy systems | 4 |
| X | ||||||||||
- Definition Investment Funds, Purchase Of Solar Energy Systems No definition available.
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| X | ||||||||||
- References No definition available.
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