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Acquisition (Details) $ in Millions | Apr. 14, 2015 USD ($) Megawatts
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Business Acquisition, Transaction Costs | $ 342
Megawatts | Megawatts | 700
Completed plant |
Business Acquisition, Transaction Costs | $ 333
Other long-term assets |
Business Acquisition, Transaction Costs | 6
Inventories |
Business Acquisition, Transaction Costs | $ 3

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