XML 119 R84.htm IDEA: XBRL DOCUMENT v3.20.4
Equity (Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Accumulated other comprehensive loss, beginning $ (169) $ (188) $ 111
Other comprehensive income (loss) before reclassifications 63 (3) (53)
Amounts reclassified from AOCI 11 24 24
Total other comprehensive income (loss), net of tax 74 21 (29)
AOCI Impact of NEP Deconsolidation     58
Less other comprehensive income attributable to noncontrolling interests 7 1  
Acquisition of Gulf Power   (1)  
AOCI Impact of Disposal of a Business 10    
Accumulated other comprehensive loss, ending (92) (169) (188)
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax (8)    
Accumulated Other Comprehensive Income (Loss), Noncontrolling Interest And Parent, Net of Tax (84)    
Cumulative Effect, Period of Adoption, Adjustment [Member]      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Accumulated other comprehensive loss, beginning     (328)
Net Unrealized Gains (Losses) on Cash Flow Hedges      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Accumulated other comprehensive loss, beginning (27) (55) (77)
Other comprehensive income (loss) before reclassifications 0 0 0
Amounts reclassified from AOCI 12 29 26
Total other comprehensive income (loss), net of tax 12 29 26
AOCI Impact of NEP Deconsolidation     3
Less other comprehensive income attributable to noncontrolling interests 0 0  
Acquisition of Gulf Power   (1)  
AOCI Impact of Disposal of a Business 23    
Accumulated other comprehensive loss, ending 8 (27) (55)
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax 0    
Accumulated Other Comprehensive Income (Loss), Noncontrolling Interest And Parent, Net of Tax 8    
Net Unrealized Gains (Losses) on Cash Flow Hedges | Cumulative Effect, Period of Adoption, Adjustment [Member]      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Accumulated other comprehensive loss, beginning     (7)
Net Unrealized Gains (Losses) on Available for Sale Securities      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Accumulated other comprehensive loss, beginning 11 (7) 316
Other comprehensive income (loss) before reclassifications 12 20 (12)
Amounts reclassified from AOCI (3) (2) 1
Total other comprehensive income (loss), net of tax 9 18 (11)
AOCI Impact of NEP Deconsolidation     0
Less other comprehensive income attributable to noncontrolling interests 0 0  
Acquisition of Gulf Power   0  
AOCI Impact of Disposal of a Business 0    
Accumulated other comprehensive loss, ending 20 11 (7)
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax 0    
Accumulated Other Comprehensive Income (Loss), Noncontrolling Interest And Parent, Net of Tax 20    
Net Unrealized Gains (Losses) on Available for Sale Securities | Cumulative Effect, Period of Adoption, Adjustment [Member]      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Accumulated other comprehensive loss, beginning     (312)
Defined Benefit Pension and Other Benefits Plans      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Accumulated other comprehensive loss, beginning (114) (65) (39)
Other comprehensive income (loss) before reclassifications 37 (46) (14)
Amounts reclassified from AOCI 2 (3) (3)
Total other comprehensive income (loss), net of tax 39 (49) (17)
AOCI Impact of NEP Deconsolidation     0
Less other comprehensive income attributable to noncontrolling interests 0 0  
Acquisition of Gulf Power   0  
AOCI Impact of Disposal of a Business 0    
Accumulated other comprehensive loss, ending (75) (114) (65)
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax 0    
Accumulated Other Comprehensive Income (Loss), Noncontrolling Interest And Parent, Net of Tax (75)    
Defined Benefit Pension and Other Benefits Plans | Cumulative Effect, Period of Adoption, Adjustment [Member]      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Accumulated other comprehensive loss, beginning     (9)
Net Unrealized Gains (Losses) on Foreign Currency Translation      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Accumulated other comprehensive loss, beginning (42) (63) (69)
Other comprehensive income (loss) before reclassifications 13 22 (31)
Amounts reclassified from AOCI 0 0 0
Total other comprehensive income (loss), net of tax 13 22 (31)
AOCI Impact of NEP Deconsolidation     37
Less other comprehensive income attributable to noncontrolling interests 7 1  
Acquisition of Gulf Power   0  
AOCI Impact of Disposal of a Business (13)    
Accumulated other comprehensive loss, ending (49) (42) (63)
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax (8)    
Accumulated Other Comprehensive Income (Loss), Noncontrolling Interest And Parent, Net of Tax (41)    
Net Unrealized Gains (Losses) on Foreign Currency Translation | Cumulative Effect, Period of Adoption, Adjustment [Member]      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Accumulated other comprehensive loss, beginning     0
Other Comprehensive Income (Loss) Related to Equity Method Investees      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Accumulated other comprehensive loss, beginning 3 2 (20)
Other comprehensive income (loss) before reclassifications 1 1 4
Amounts reclassified from AOCI 0 0 0
Total other comprehensive income (loss), net of tax 1 1 4
AOCI Impact of NEP Deconsolidation     18
Less other comprehensive income attributable to noncontrolling interests 0 0  
Acquisition of Gulf Power   0  
AOCI Impact of Disposal of a Business 0    
Accumulated other comprehensive loss, ending 4 $ 3 2
AOCI Including Portion Attributable to Noncontrolling Interest, Net Of Tax 0    
Accumulated Other Comprehensive Income (Loss), Noncontrolling Interest And Parent, Net of Tax $ 4    
Other Comprehensive Income (Loss) Related to Equity Method Investees | Cumulative Effect, Period of Adoption, Adjustment [Member]      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Accumulated other comprehensive loss, beginning     $ 0