v3.19.2

Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2019
Accounting Policies [Abstract] |
Schedule of components of restricted cash | The table below represents the components of our restricted cash as of June 30, 2019 and December 31, 2018 (in millions):
| June 30, 2019 |  | December 31, 2018
| Current |  | Non-Current |  | Total |  | Current |  | Non-Current |  | Total
Debt service | $ | 51 |  |  | $ | 8 |  |  | $ | 59 |  |  | $ | 13 |  |  | $ | 8 |  |  | $ | 21 |
Construction/major maintenance | 9 |  |  | 39 |  |  | 48 |  |  | 23 |  |  | 24 |  |  | 47 |
Security/project/insurance | 112 |  |  | 31 |  |  | 143 |  |  | 120 |  |  | — |  |  | 120 |
Other | 10 |  |  | 2 |  |  | 12 |  |  | 11 |  |  | 2 |  |  | 13 |
Total | $ | 182 |  |  | $ | 80 |  |  | $ | 262 |  |  | $ | 167 |  |  | $ | 34 |  |  | $ | 201 |
Schedule of property, plant and equipment | Property, Plant and Equipment, Net — At June 30, 2019 and December 31, 2018, the components of property, plant and equipment are stated at cost less accumulated depreciation as follows (in millions):
| June 30, 2019 |  | December 31, 2018 |  | Depreciable Lives
Buildings, machinery and equipment | $ | 16,522 |  |  | $ | 16,400 |  |  | 1.5 | – | 50 | Years
Geothermal properties | 1,509 |  |  | 1,501 |  |  | 13 | – | 58 | Years
Other | 269 |  |  | 286 |  |  | 3 | – | 50 | Years
| 18,300 |  |  | 18,187 |  |  |  |  |  |
Less: Accumulated depreciation | 6,860 |  |  | 6,832 |  |  |  |  |  |
| 11,440 |  |  | 11,355 |  |  |  |  |  |
Land | 128 |  |  | 121 |  |  |  |  |  |
Construction in progress | 483 |  |  | 966 |  |  |  |  |  |
Property, plant and equipment, net | $ | 12,051 |  |  | $ | 12,442 |  |  |  |  |  |

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