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Property, Plant and Equipment (Property, Plant and Equipment) (Detail) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Utility: |  |
Generation | $ 19,250 | $ 17,602
Transmission | 16,669 | 15,335
Distribution | 18,549 | 17,408
Storage | 2,905 | 2,887
Nuclear fuel | 1,626 | 1,599
Gas gathering and processing | 307 | 219
Oil and gas | 1,763 | 1,720
General and other | 1,476 | 1,514
Plant under construction | 2,385 | 7,765
Total utility | 64,930 | 66,049
Nonutility: |  |
Merchant generation-nuclear | 1,550 | 1,452
Merchant generation-other | 3,802 | 4,992
Nuclear fuel | 1,025 | 968
Gas gathering and processing | 185 | 630
LNG facility | 3,977 |
Other-including plant under construction | 1,109 | 732
Total nonutility | 11,648 | 8,774
Total property, plant and equipment | 76,578 | 74,823
Virginia Electric and Power Company |  |
Utility: |  |
Generation | 19,250 | 17,602
Transmission | 9,392 | 8,332
Distribution | 11,785 | 11,151
Nuclear fuel | 1,626 | 1,599
General and other | 821 | 794
Plant under construction | 1,639 | 2,840
Total utility | 44,513 | 42,318
Nonutility: |  |
Other-including plant under construction | 11 | 11
Total property, plant and equipment | 44,524 | 42,329
Dominion Energy Gas Holdings, LLC |  |
Utility: |  |
Transmission | 4,758 | 4,732
Distribution | 3,527 | 3,267
Storage | 1,691 | 1,688
Gas gathering and processing | 210 | 202
General and other | 233 | 216
Plant under construction | 494 | 293
Total utility | 10,913 | 10,398
Nonutility: |  |
Gas gathering and processing | 185 | 630
Other-including plant under construction | 140 | 145
Total nonutility | 325 | 775
Total property, plant and equipment | $ 11,238 | $ 11,173

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