XML 47 R79.htm IDEA: XBRL DOCUMENT v2.4.0.8
Fair Value Measurements (Reconciliation of Assets and Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Investments        
Beginning balance $ 85 $ 16 $ 111 $ 13
Total pretax gains (losses) included in earnings (6) (11) 12 (21)
Total pretax gains (losses) included in comprehensive income   (1)   (2)
Purchases 66 24 67 24
Sales (1)   (2) (3)
Issuances (1) (3) (1) (6)
Settlements (6) (10) (45) (3)
Transfers in and/or out of level 3 (70)   (65)  
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities 3 (5) 3 (4)
Ending balance 210 10 210 10
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning balance (14) (82) 13 (85)
Total pretax gains (losses) included in earnings (6) (11) 12 (21)
Total pretax gains (losses) included in comprehensive income          
Purchases 51 21 51 21
Sales           
Issuances (1)    (1) (6)
Settlements (6) (9) (45) (2)
Transfers out of level 3 (2)   3  
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities (4) (6) (5) (6)
Ending balance 22 (87) 22 (87)
Pretax amounts included in the Condensed Consolidated Statements of Comprehensive Income related to Level 3 measurements outstanding (25)   (25)  
Investments [Member]
       
Investments        
Beginning balance 99 98 98 98
Total pretax gains (losses) included in earnings            
Total pretax gains (losses) included in comprehensive income   (1)   (2)
Purchases 15 3 16 3
Sales (1)   (2) (3)
Issuances    (3)      
Settlements    (1)    (1)
Transfers in and/or out of level 3 (68)   (68)  
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities 7 1 8 2
Ending balance 188 97 188 97
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Pretax amounts included in the Condensed Consolidated Statements of Comprehensive Income related to Level 3 measurements outstanding          
Duke Energy Carolinas [Member]
       
Investments        
Beginning balance 78 68 79 60
Purchases 15 3 16 3
Sales (1) (3) (2) (3)
Settlements 1 1 (1) 8
Transfers in and/or out of level 3 68   68  
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities 7 1 8 2
Ending balance 168 70 168 70
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning balance (4) (5) (2) (12)
Purchases            
Sales            
Settlements 1 1 (1) 8
Transfers out of level 3          
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities            
Ending balance (3) (4) (3) (4)
Duke Energy Carolinas [Member] | Investments [Member]
       
Investments        
Beginning balance 82 73 81 72
Purchases 15 3 16 3
Sales (1) (3) (2) (3)
Settlements            
Transfers in and/or out of level 3 68   68  
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities 7 1 8 2
Ending balance 171 74 171 74
Progress Energy [Member]
       
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning balance (3) (31)    (38)
Total pretax gains (losses) included in earnings 3         
Issuances    (1)    (7)
Transfers out of level 3 (2)    (2)   
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities (2) (5) (2) (4)
Ending balance    (35)    (35)
Duke Energy Progress [Member]
       
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning balance (3) (31)    (38)
Total pretax gains (losses) included in earnings 3       0
Issuances    (1)    (7)
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities    (5)    (4)
Ending balance    (35)    (35)
Duke Energy Ohio [Member]
       
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning balance (19) (5) (4) (6)
Total pretax gains (losses) included in earnings (13) (14) (19) (10)
Purchases 1 1 1 1
Settlements       (4) (3)
Transfers out of level 3 (1)    4   
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities 2 (1) 2 (1)
Ending balance (28) (19) (28) (19)
Pretax amounts included in the Condensed Consolidated Statements of Comprehensive Income related to Level 3 measurements outstanding      (27)  
Duke Energy Indiana [Member]
       
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning balance 7 4 12 10
Total pretax gains (losses) included in earnings    7 27 2
Purchases 49 20 49   
Sales          20
Settlements (7) (13) (38) (13)
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities (4)    (5) (1)
Ending balance $ 45 $ 18 $ 45 $ 18