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Acquisition (Details) - Apr. 14, 2015 $ in Millions | 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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