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SUBSEQUENT EVENTS (Details) - Subsequent event ¥ in Millions, $ in Millions | 1 Months Ended
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Mar. 31, 2017 CNY (¥) item | Mar. 31, 2017 USD ($) item | Feb. 28, 2017 USD ($) item
Fengate SSM Holdco LP | 59.8 Megawatt (MWac) three solar farms |  |  |
SUBSEQUENT EVENTS |  |  |
Number of utility sold |  |  | 3
Fengate SSM Holdco LP | Minimum | 59.8 Megawatt (MWac) three solar farms |  |  |
SUBSEQUENT EVENTS |  |  |
Sale proceeds | $ |  |  | $ 195.0
Shenzhen Energy Nanjing Holding Co. Ltd | 69.5 Megawatt (MWp) two solar power plants |  |  |
SUBSEQUENT EVENTS |  |  |
Number of utility sold | 2 | 2 |
Sale proceeds | ¥ 687.1 | $ 99.8 |

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- Definition The cash inflow from the sale of investment projects held by an entity in hopes of getting a future return or interest from it. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 + Details
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