XML 67 R52.htm IDEA: XBRL DOCUMENT v3.19.2
Equity (Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Jan. 01, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]              
Beginning balance $ (213) $ (188) $ (178) $ 111 $ (188) $ 111  
Other comprehensive income (loss) before reclassifications 15 (35) (1) (24)      
Amounts reclassified from AOCI 7 11 6 5      
Total other comprehensive income (loss), net of tax 22 (24) 5 [1] (19) (2) (14) [1]  
Acquisition of Gulf Power   (1)          
Impact of NEP deconsolidation 0   0 [1] 58 0 58 [1]  
Adoption of accounting standards updates             $ (328)
Ending balance (191) (213) (173) (178) (191) (173)  
Net Unrealized Gains (Losses) on Cash Flow Hedges              
AOCI Attributable to Parent, Net of Tax [Roll Forward]              
Beginning balance (46) (55) (74) (77) (55) (77)  
Other comprehensive income (loss) before reclassifications 0 0 0 0      
Amounts reclassified from AOCI 8 10 7 7      
Total other comprehensive income (loss), net of tax 8 10 7 7      
Acquisition of Gulf Power   (1)          
Impact of NEP deconsolidation       3      
Adoption of accounting standards updates             (7)
Ending balance (38) (46) (67) (74) (38) (67)  
Net Unrealized Gains (Losses) on Available for Sale Securities              
AOCI Attributable to Parent, Net of Tax [Roll Forward]              
Beginning balance 3 (7) (2) 316 (7) 316  
Other comprehensive income (loss) before reclassifications 7 8 (3) (5)      
Amounts reclassified from AOCI (1) 2 0 (1)      
Total other comprehensive income (loss), net of tax 6 10 (3) (6)      
Acquisition of Gulf Power   0          
Impact of NEP deconsolidation       0      
Adoption of accounting standards updates             (312)
Ending balance 9 3 (5) (2) 9 (5)  
Defined Benefit Pension and Other Benefits Plans              
AOCI Attributable to Parent, Net of Tax [Roll Forward]              
Beginning balance (118) (65) (50) (39) (65) (39)  
Other comprehensive income (loss) before reclassifications (1) (52) 0 (1)      
Amounts reclassified from AOCI 0 (1) (1) (1)      
Total other comprehensive income (loss), net of tax (1) (53) (1) (2)      
Acquisition of Gulf Power   0          
Impact of NEP deconsolidation       0      
Adoption of accounting standards updates             (9)
Ending balance (119) (118) (51) (50) (119) (51)  
Net Unrealized Gains (Losses) on Foreign Currency Translation              
AOCI Attributable to Parent, Net of Tax [Roll Forward]              
Beginning balance (53) (63) (52) (69) (63) (69)  
Other comprehensive income (loss) before reclassifications 8 10 0 (20)      
Amounts reclassified from AOCI 0 0 0 0      
Total other comprehensive income (loss), net of tax 8 10 0 (20)      
Acquisition of Gulf Power   0          
Impact of NEP deconsolidation       37      
Adoption of accounting standards updates             0
Ending balance (45) (53) (52) (52) (45) (52)  
Other Comprehensive Income (Loss) Related to Equity Method Investees              
AOCI Attributable to Parent, Net of Tax [Roll Forward]              
Beginning balance 1 2 0 (20) 2 (20)  
Other comprehensive income (loss) before reclassifications 1 (1) 2 2      
Amounts reclassified from AOCI 0 0 0 0      
Total other comprehensive income (loss), net of tax 1 (1) 2 2      
Acquisition of Gulf Power   0          
Impact of NEP deconsolidation       18      
Adoption of accounting standards updates             $ 0
Ending balance $ 2 $ 1 $ 2 $ 0 $ 2 $ 2  
[1] Amounts have been retrospectively adjusted for an accounting standards update related to leases.