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Quarterly Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Data (Unaudited) [Abstract] |
Condensed Consolidated Quarterly Financial Information | Condensed consolidated quarterly financial information is as follows:
| March 31(a) |  | June 30(a) |  | September 30(a) |  | December 31(a)
| (millions, except per share amounts)
NEE: |  |  |  |  |  |  |
2017 |  |  |  |  |  |  |
Operating revenues(b) | $ | 3,972 |  |  | $ | 4,404 |  |  | $ | 4,808 |  |  | $ | 4,010 |
Operating income(b)(c) | $ | 2,405 |  |  | $ | 1,285 |  |  | $ | 1,399 |  |  | $ | 236 |
Net income(b)(c) | $ | 1,591 |  |  | $ | 804 |  |  | $ | 856 |  |  | $ | 2,068 |
Net income attributable to NEE(b)(c) | $ | 1,583 |  |  | $ | 793 |  |  | $ | 847 |  |  | $ | 2,155 |
Earnings per share attributable to NEE - basic(c)(d) | $ | 3.39 |  |  | $ | 1.69 |  |  | $ | 1.80 |  |  | $ | 4.58 |
Earnings per share attributable to NEE - assuming dilution(c)(d) | $ | 3.37 |  |  | $ | 1.68 |  |  | $ | 1.79 |  |  | $ | 4.55 |
Dividends per share | $ | 0.9825 |  |  | $ | 0.9825 |  |  | $ | 0.9825 |  |  | $ | 0.9825 |
High-low common stock sales prices | $133.28 - $117.33 |  |  | $144.87 - $127.09 |  |  | $151.60 - 138.00 |  |  | $159.40 - $145.62 |
2016 |  |  |  |  |  |  |
Operating revenues(b) | $ | 3,835 |  |  | $ | 3,817 |  |  | $ | 4,805 |  |  | $ | 3,699 |
Operating income(b) | $ | 1,234 |  |  | $ | 1,169 |  |  | $ | 1,279 |  |  | $ | 926 |
Net income(b) | $ | 654 |  |  | $ | 544 |  |  | $ | 789 |  |  | $ | 1,017 |
Net income attributable to NEE(b) | $ | 653 |  |  | $ | 540 |  |  | $ | 753 |  |  | $ | 966 |
Earnings per share attributable to NEE - basic(d) | $ | 1.42 |  |  | $ | 1.17 |  |  | $ | 1.63 |  |  | $ | 2.07 |
Earnings per share attributable to NEE - assuming dilution(d) | $ | 1.41 |  |  | $ | 1.16 |  |  | $ | 1.62 |  |  | $ | 2.06 |
Dividends per share | $ | 0.87 |  |  | $ | 0.87 |  |  | $ | 0.87 |  |  | $ | 0.87 |
High-low common stock sales prices | $119.37 - $102.20 |  |  | $130.43 - $112.44 |  |  | $131.98 - $120.22 |  |  | $128.46 - $110.49 |
FPL: |  |  |  |  |  |  |
2017 |  |  |  |  |  |  |
Operating revenues(b) | $ | 2,527 |  |  | $ | 3,091 |  |  | $ | 3,477 |  |  | $ | 2,877 |
Operating income(b) | $ | 811 |  |  | $ | 941 |  |  | $ | 1,022 |  |  | $ | 618 |
Net income(b) | $ | 445 |  |  | $ | 526 |  |  | $ | 566 |  |  | $ | 344 |
2016 |  |  |  |  |  |  |
Operating revenues(b) | $ | 2,303 |  |  | $ | 2,750 |  |  | $ | 3,283 |  |  | $ | 2,558 |
Operating income(b) | $ | 714 |  |  | $ | 828 |  |  | $ | 921 |  |  | $ | 694 |
Net income(b) | $ | 393 |  |  | $ | 448 |  |  | $ | 515 |  |  | $ | 371 |
______________________
(a) | In the opinion of NEE and FPL management, all adjustments, which consist of normal recurring accruals necessary to present a fair statement of the amounts shown for such periods, have been made. Results of operations for an interim period generally will not give a true indication of results for the year.
(b) | The sum of the quarterly amounts may not equal the total for the year due to rounding.
(c) | First quarter of 2017 includes gain on disposal of a business (see Note 1 - Assets and Liabilities Associated with Assets Held for Sale); fourth quarter of 2017 includes impairment charges (see Note 4 - Nonrecurring Fair Value Measurements) and net favorable tax reform impacts (see Note 5).
(d) | The sum of the quarterly amounts may not equal the total for the year due to rounding and changes in weighted-average number of common shares outstanding.

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=84173487&loc=d3e1280-108306 + Details
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