XML 71 R36.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Asset Retirement Obligations (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Asset Retirement Obligations [Abstract] |
Asset retirement obligation, roll forward analysis | A rollforward of NEE's and FPL's AROs is as follows:
| FPL |  | NEER |  | NEE
|  |  | (millions) |  |
Balances, December 31, 2015 | $ | 1,822 |  |  | $ | 647 |  |  | $ | 2,469 |
Liabilities incurred | 1 |  |  | 56 |  |  | 57 |
Accretion expense | 91 |  |  | 47 |  |  | 138 |
Liabilities settled | — |  |  | (2 | ) |  | (2 | )
Revision in estimated cash flows - net | 5 |  |  | 69 |  | (a) | 74 |
Balances, December 31, 2016 | 1,919 |  |  | 817 |  |  | 2,736 |
Liabilities incurred | 17 |  |  | 59 |  |  | 76 |
Accretion expense | 96 |  |  | 52 |  |  | 148 |
Liabilities settled | — |  |  | (14 | ) | (b) | (14 | )
Revision in estimated cash flows - net | 15 |  |  | 70 |  | (c) | 85 |
Balances, December 31, 2017 | $ | 2,047 |  |  | $ | 984 |  |  | $ | 3,031 |
______________________
(a) | Primarily reflects the effect of revised cost estimates to dismantle certain of NEER’s wind and solar facilities.
(b) | Includes approximately $13 million reclassified to liabilities associated with assets held for sale in NEE's consolidated balance sheets. See Note 1 - Assets and Liabilities Associated with Assets Held for Sale.
(c) | Primarily reflects the effect of the revised cost estimate due to the change in useful life of Duane Arnold. See Note 4 - Nonrecurring Fair Value Measurements
Funds restricted for decommissioning included in special use funds | Restricted funds for the payment of future expenditures to decommission NEE's and FPL's nuclear units included in special use funds on NEE's and FPL's consolidated balance sheets are as follows (see Note 4 - Special Use Funds):
| FPL |  | NEER |  | NEE
|  |  | (millions) |  |
Balances, December 31, 2017 | $ | 4,090 |  |  | $ | 1,913 |  |  | $ | 6,003 |
Balances, December 31, 2016 | $ | 3,665 |  |  | $ | 1,769 |  |  | $ | 5,434 |

X
- Definition Asset Retirement Obligations [Abstract] + References No definition available. + Details
Name: | nee_AssetRetirementObligationsAbstract
Namespace Prefix: | nee_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the restricted funds for the payment of future expenditures to decommission nuclear units included in special use funds on the consolidated balance sheets. + References No definition available. + Details
Name: | nee_RestrictedFundsIncludedInSpecialUseFundsTextBlock
Namespace Prefix: | nee_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
Name: | us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration