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Summarized Financial Information of NEECH (Statement of Operations) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Condensed Income Statements, Captions [Line Items] |  |  |  |  |  |
NEECH a 100% owned subsidiary of NEE | 100.00% |  |  | 100.00% |  |
Condensed Consolidating Statements of Income |  |  |  |  |  |
Operating revenues | $ 5,572 | $ 4,416 | [1] | $ 14,616 | $ 12,337 | [1]
Operating expenses - net | (3,979) | (3,448) | [1] | (10,140) | (9,164) | [1]
Interest expense | (746) | (168) | [1] | (2,061) | (788) | [1]
Equity in earnings of subsidiaries | 0 | 0 |  | 0 | 0 |
Equity in earnings (losses) of equity method investees | (90) | 122 | [1] | (80) | 371 | [1],[2]
Gain on NEP deconsolidation | 0 | 0 | [1] | 0 | 3,927 | [1],[2]
Other income - net | 99 | 144 |  | 465 | 381 |
INCOME BEFORE INCOME TAXES | 856 | 1,066 | [1] | 2,800 | 7,064 | [1]
Income tax expense (benefit) | 58 | 125 | [1] | 256 | 1,602 | [1]
Net Income (Loss) | 798 | 941 | [1],[3] | 2,544 | 5,462 | [2],[3]
Net income (loss) attributable to noncontrolling interest | 81 | 64 | [1] | 250 | 754 | [1]
Net Income (Loss) Attributable to Parent | 879 | 1,005 | [1] | 2,794 | 6,216 | [1]
Comprehensive income (loss) attributable to NEE | 889 | 1,021 | [3] | 2,802 | 6,276 | [3]
Reportable Legal Entities [Member] | NextEra Energy (Guarantor) [Member] |  |  |  |  |  |
Condensed Consolidating Statements of Income |  |  |  |  |  |
Operating revenues | 0 | 0 |  | 0 | 0 |
Operating expenses - net | (55) | (46) |  | (153) | (159) |
Interest expense | (1) | (5) |  | (2) | (16) |
Equity in earnings of subsidiaries | 879 | 961 |  | 2,808 | 6,119 |
Equity in earnings (losses) of equity method investees | 0 | 0 |  | 0 | 0 |
Gain on NEP deconsolidation |  |  |  | 0 | 0 |
Other income - net | 50 | 37 |  | 138 | 138 |
INCOME BEFORE INCOME TAXES | 873 | 947 |  | 2,791 | 6,082 |
Income tax expense (benefit) | (6) | (58) |  | (3) | (134) |
Net Income (Loss) | 879 | 1,005 |  | 2,794 | 6,216 |
Net income (loss) attributable to noncontrolling interest | 0 | 0 |  | 0 | 0 |
Net Income (Loss) Attributable to Parent | 879 | 1,005 |  | 2,794 | 6,216 |
Comprehensive income (loss) attributable to NEE | 889 | 1,021 |  | 2,802 | 6,276 |
Reportable Legal Entities [Member] | NEECH Non-Guarantor Subsidiaries [Member] |  |  |  |  |  |
Condensed Consolidating Statements of Income |  |  |  |  |  |
Operating revenues | 1,684 | 1,052 |  | 4,325 | 3,512 |
Operating expenses - net | (1,121) | (941) |  | (2,602) | (2,705) |
Interest expense | (580) | (27) |  | (1,576) | (363) |
Equity in earnings of subsidiaries | 0 | 0 |  | 0 | 0 |
Equity in earnings (losses) of equity method investees | (90) | 122 |  | (80) | 371 |
Gain on NEP deconsolidation |  |  |  | 0 | 3,927 |
Other income - net | 33 | 82 |  | 275 | 174 |
INCOME BEFORE INCOME TAXES | (74) | 288 |  | 342 | 4,916 |
Income tax expense (benefit) | (109) | 51 |  | (135) | 1,316 |
Net Income (Loss) | 35 | 237 |  | 477 | 3,600 |
Net income (loss) attributable to noncontrolling interest | 81 | 64 |  | 250 | 754 |
Net Income (Loss) Attributable to Parent | 116 | 301 |  | 727 | 4,354 |
Comprehensive income (loss) attributable to NEE | 127 | 318 |  | 790 | 4,418 |
Consolidation, Eliminations [Member] |  |  |  |  |  |
Condensed Consolidating Statements of Income |  |  |  |  |  |
Operating revenues | 3,888 | 3,364 |  | 10,291 | 8,825 |
Operating expenses - net | (2,803) | (2,461) |  | (7,385) | (6,300) |
Interest expense | (165) | (136) |  | (483) | (409) |
Equity in earnings of subsidiaries | (879) | (961) |  | (2,808) | (6,119) |
Equity in earnings (losses) of equity method investees | 0 | 0 |  | 0 | 0 |
Gain on NEP deconsolidation |  |  |  | 0 | 0 |
Other income - net | 16 | 25 |  | 52 | 69 |
INCOME BEFORE INCOME TAXES | 57 | (169) |  | (333) | (3,934) |
Income tax expense (benefit) | 173 | 132 |  | 394 | 420 |
Net Income (Loss) | (116) | (301) |  | (727) | (4,354) |
Net income (loss) attributable to noncontrolling interest | 0 | 0 |  | 0 | 0 |
Net Income (Loss) Attributable to Parent | (116) | (301) |  | (727) | (4,354) |
Comprehensive income (loss) attributable to NEE | $ (127) | $ (318) |  | $ (790) | $ (4,418) |
[1] | Amounts have been retrospectively adjusted for an accounting standards update related to leases.
[2] | Amounts have been retrospectively adjusted for an accounting standards update related to leases.
[3] | Amounts have been retrospectively adjusted for an accounting standards update related to leases.

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