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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2019
Asset Retirement Obligations [Abstract]  
Asset retirement obligation, roll forward analysis
A rollforward of NEE's and FPL's AROs is as follows:
 
NEE
 
FPL
 
 
(millions)
 
Balances, December 31, 2017
$
3,031

 
$
2,047

 
Liabilities incurred
49

 
—

 
Accretion expense
158

 
101

 
Liabilities settled
(26
)
(a) 
(1
)
 
Revision in estimated cash flows - net
4

 
—

 
Impact of NEP deconsolidation
(81
)
(b) 
—

 
Balances, December 31, 2018
3,135

 
2,147

 
Liabilities incurred
100

 
1

 
Accretion expense
172

 
107

 
Liabilities settled
(65
)
(a) 
(1
)
 
Revision in estimated cash flows - net
32

(c) 
14

(c) 
Additions from acquisitions
132

(d) 
—

 
Balances, December 31, 2019
$
3,506

(e) 
$
2,268

 

______________________
(a)
Primarily reflects sales of ownership interests to subsidiaries of NEP. See Note 1 - Disposal of Businesses/Assets.
(b)
See Note 1 - NextEra Energy Partners, LP.
(c)
Includes an increase of approximately $75 million for additional estimated ash pond closure costs at Scherer, partly offset by a decrease of approximately $71 million due to the approval of Turkey Point Units Nos. 3 and 4 license renewals for an additional 20 years.
(d)
See Note 8 for 2019 acquisitions.
(e)
Includes the current portion of AROs of approximately $49 million, which is included in other current liabilities on NEE's consolidated balance sheets.
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 5 - Special Use Funds):
 
NEE
 
FPL
 
(millions)
Balances, December 31, 2019
$
6,880

 
$
4,697

Balances, December 31, 2018
$
5,818

 
$
3,987