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PROPERTY, PLANT AND EQUIPMENT - Net Book Value (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 | Dec. 31, 2019
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | $ 23,013 |
Ending balance | 22,279 | $ 23,013
Current lease liabilities | 216 |
Non-current lease liabilities | 1,519 |
Utilities |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 4,959 |
Ending balance | 4,722 | 4,959
Right-of-use assets | 15 |
Transport |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 8,206 |
Ending balance | 8,080 | 8,206
Right-of-use assets | 1,271 |
Energy |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 8,805 |
Ending balance | 8,487 | 8,805
Right-of-use assets | 254 |
Data Infrastructure |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 1,043 |
Ending balance | 990 | 1,043
Right-of-use assets | 526 |
Gross Carrying Amount: |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 22,044 | 11,630
Change in Accounting Policies |  | 1,207
Additions, net of disposals | 593 | 1,016
Non-cash disposals | (119) | (274)
Acquisitions through business combinations |  | 8,710
Decrease through classified as held for sale, property, plant and equipment |  | (458)
Net foreign currency exchange differences | (744) | 213
Ending balance | 21,774 | 22,044
Gross Carrying Amount: | Utilities |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 4,183 | 4,020
Change in Accounting Policies |  | 21
Additions, net of disposals | 173 | 467
Non-cash disposals | 2 | (2)
Acquisitions through business combinations |  | 0
Decrease through classified as held for sale, property, plant and equipment |  | (458)
Net foreign currency exchange differences | (291) | 135
Ending balance | 4,067 | 4,183
Gross Carrying Amount: | Transport |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 8,299 | 2,485
Change in Accounting Policies |  | 356
Additions, net of disposals | 185 | 122
Non-cash disposals | (82) | 49
Acquisitions through business combinations |  | 5,283
Decrease through classified as held for sale, property, plant and equipment |  | 0
Net foreign currency exchange differences | (132) | 4
Ending balance | 8,270 | 8,299
Gross Carrying Amount: | Energy |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 8,431 | 4,681
Change in Accounting Policies |  | 197
Additions, net of disposals | 221 | 419
Non-cash disposals | (29) | (270)
Acquisitions through business combinations |  | 3,332
Decrease through classified as held for sale, property, plant and equipment |  | 0
Net foreign currency exchange differences | (307) | 72
Ending balance | 8,316 | 8,431
Gross Carrying Amount: | Data Infrastructure |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 1,131 | 444
Change in Accounting Policies |  | 633
Additions, net of disposals | 14 | 8
Non-cash disposals | (10) | (51)
Acquisitions through business combinations |  | 95
Decrease through classified as held for sale, property, plant and equipment |  | 0
Net foreign currency exchange differences | (14) | 2
Ending balance | 1,121 | 1,131
Accumulated depreciation: |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | (2,417) | (1,849)
Non-cash disposals | 108 | 26
Decrease through classified as held for sale, property, plant and equipment |  | 194
Net foreign currency exchange differences | 95 | (29)
Depreciation expense | (543) | (764)
Disposals | 6 | 5
Ending balance | (2,751) | (2,417)
Accumulated depreciation: | Utilities |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | (594) | (613)
Non-cash disposals | 0 | 3
Decrease through classified as held for sale, property, plant and equipment |  | 194
Net foreign currency exchange differences | 40 | (14)
Depreciation expense | (74) | (171)
Disposals | 1 | 7
Ending balance | (627) | (594)
Accumulated depreciation: | Transport |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | (950) | (744)
Non-cash disposals | 100 | (27)
Decrease through classified as held for sale, property, plant and equipment |  | 0
Net foreign currency exchange differences | 34 | (3)
Depreciation expense | (215) | (178)
Disposals | 4 | 2
Ending balance | (1,027) | (950)
Accumulated depreciation: | Energy |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | (785) | (492)
Non-cash disposals | 2 | 50
Decrease through classified as held for sale, property, plant and equipment |  | 0
Net foreign currency exchange differences | 20 | (11)
Depreciation expense | (204) | (328)
Disposals | 1 | (4)
Ending balance | (966) | (785)
Accumulated depreciation: | Data Infrastructure |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | (88) | 0
Non-cash disposals | 6 | 0
Decrease through classified as held for sale, property, plant and equipment |  | 0
Net foreign currency exchange differences | 1 | (1)
Depreciation expense | (50) | (87)
Disposals | 0 | 0
Ending balance | (131) | (88)
Accumulated fair value adjustments: |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 3,386 | 3,033
Non-cash disposals |  | (12)
Decrease through classified as held for sale, property, plant and equipment |  | (416)
Net foreign currency exchange differences | (130) | 62
Fair value adjustments |  | 719
Ending balance | 3,256 | 3,386
Accumulated fair value adjustments: | Utilities |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 1,370 | 1,401
Non-cash disposals |  | 0
Decrease through classified as held for sale, property, plant and equipment |  | (416)
Net foreign currency exchange differences | (88) | 38
Fair value adjustments |  | 347
Ending balance | 1,282 | 1,370
Accumulated fair value adjustments: | Transport |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 857 | 810
Non-cash disposals |  | 0
Decrease through classified as held for sale, property, plant and equipment |  | 0
Net foreign currency exchange differences | (20) | 2
Fair value adjustments |  | 45
Ending balance | 837 | 857
Accumulated fair value adjustments: | Energy |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 1,159 | 822
Non-cash disposals |  | (12)
Decrease through classified as held for sale, property, plant and equipment |  | 0
Net foreign currency exchange differences | (22) | 22
Fair value adjustments |  | 327
Ending balance | 1,137 | 1,159
Accumulated fair value adjustments: | Data Infrastructure |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 0 | 0
Non-cash disposals |  | 0
Decrease through classified as held for sale, property, plant and equipment |  | 0
Net foreign currency exchange differences | 0 | 0
Fair value adjustments |  | 0
Ending balance | $ 0 | $ 0

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