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Fair Value Measurements (Assets and Liabilities that are Measured at Fair Value on a Recurring Basis) (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2012
Sep. 30, 2012
Fair Value, Measurements, Recurring
Sep. 30, 2011
Fair Value, Measurements, Recurring
Sep. 30, 2012
Fair Value, Measurements, Recurring
Commodity Contract
Sep. 30, 2011
Fair Value, Measurements, Recurring
Commodity Contract
Sep. 30, 2012
Fair Value, Measurements, Recurring
Interest Rate Contract
Sep. 30, 2011
Fair Value, Measurements, Recurring
Interest Rate Contract
Sep. 30, 2012
Fair Value, Measurements, Recurring
Equity Securities
Large cap
United States
Sep. 30, 2011
Fair Value, Measurements, Recurring
Equity Securities
Large cap
United States
Sep. 30, 2012
Fair Value, Measurements, Recurring
Equity Securities
Large cap
Non United States
Sep. 30, 2011
Fair Value, Measurements, Recurring
Equity Securities
Large cap
Non United States
Sep. 30, 2012
Fair Value, Measurements, Recurring
Equity Securities
Equity securities, other
United States
Sep. 30, 2011
Fair Value, Measurements, Recurring
Equity Securities
Equity securities, other
United States
Sep. 30, 2012
Fair Value, Measurements, Recurring
Fixed Income Securities
Corporate Debt Securities
Sep. 30, 2011
Fair Value, Measurements, Recurring
Fixed Income Securities
Corporate Debt Securities
Sep. 30, 2012
Fair Value, Measurements, Recurring
Fixed Income Securities
U.S. Treasury securities and agency debentures
Sep. 30, 2011
Fair Value, Measurements, Recurring
Fixed Income Securities
U.S. Treasury securities and agency debentures
Sep. 30, 2012
Fair Value, Measurements, Recurring
Fixed Income Securities
State and municipal
Sep. 30, 2011
Fair Value, Measurements, Recurring
Fixed Income Securities
State and municipal
Sep. 30, 2012
Fair Value, Measurements, Recurring
Fixed Income Securities
Debt securities, other
Sep. 30, 2011
Fair Value, Measurements, Recurring
Fixed Income Securities
Debt securities, other
Sep. 30, 2012
Fair Value, Measurements, Recurring
Cash equivalents and other
Sep. 30, 2011
Fair Value, Measurements, Recurring
Cash equivalents and other
Sep. 30, 2012
Fair Value, Measurements, Recurring
Restricted cash equivalents
Sep. 30, 2011
Fair Value, Measurements, Recurring
Restricted cash equivalents
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 1
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 1
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 1
Commodity Contract
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 1
Commodity Contract
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 1
Interest Rate Contract
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 1
Interest Rate Contract
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 1
Equity Securities
Large cap
United States
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 1
Equity Securities
Large cap
United States
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 1
Equity Securities
Large cap
Non United States
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 1
Equity Securities
Large cap
Non United States
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 1
Equity Securities
Equity securities, other
United States
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 1
Equity Securities
Equity securities, other
United States
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
Corporate Debt Securities
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
Corporate Debt Securities
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
U.S. Treasury securities and agency debentures
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
U.S. Treasury securities and agency debentures
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
State and municipal
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
State and municipal
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
Debt securities, other
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
Debt securities, other
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 1
Cash equivalents and other
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 1
Cash equivalents and other
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 1
Restricted cash equivalents
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 1
Restricted cash equivalents
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 2
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 2
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 2
Commodity Contract
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 2
Commodity Contract
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 2
Interest Rate Contract
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 2
Interest Rate Contract
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 2
Equity Securities
Large cap
United States
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 2
Equity Securities
Large cap
United States
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 2
Equity Securities
Large cap
Non United States
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 2
Equity Securities
Large cap
Non United States
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 2
Equity Securities
Equity securities, other
United States
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 2
Equity Securities
Equity securities, other
United States
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
Corporate Debt Securities
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
Corporate Debt Securities
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
U.S. Treasury securities and agency debentures
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
U.S. Treasury securities and agency debentures
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
State and municipal
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
State and municipal
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
Debt securities, other
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
Debt securities, other
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 2
Cash equivalents and other
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 2
Cash equivalents and other
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 2
Restricted cash equivalents
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 2
Restricted cash equivalents
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 3
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 3
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 3
Commodity Contract
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 3
Commodity Contract
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 3
Interest Rate Contract
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 3
Interest Rate Contract
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 3
Equity Securities
Large cap
United States
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 3
Equity Securities
Large cap
United States
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 3
Equity Securities
Large cap
Non United States
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 3
Equity Securities
Large cap
Non United States
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 3
Equity Securities
Equity securities, other
United States
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 3
Equity Securities
Equity securities, other
United States
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
Corporate Debt Securities
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
Corporate Debt Securities
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
U.S. Treasury securities and agency debentures
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
U.S. Treasury securities and agency debentures
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
State and municipal
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
State and municipal
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
Debt securities, other
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
Debt securities, other
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 3
Cash equivalents and other
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 3
Cash equivalents and other
Sep. 30, 2012
Fair Value, Measurements, Recurring
Level 3
Restricted cash equivalents
Sep. 30, 2011
Fair Value, Measurements, Recurring
Level 3
Restricted cash equivalents
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Commodity Contract
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Commodity Contract
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Interest Rate Contract
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Interest Rate Contract
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Equity Securities
Large cap
United States
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Equity Securities
Large cap
United States
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Equity Securities
Equity securities, other
United States
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Equity Securities
Equity securities, other
United States
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Fixed Income Securities
Corporate Debt Securities
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Fixed Income Securities
Corporate Debt Securities
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Fixed Income Securities
U.S. Treasury securities and agency debentures
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Fixed Income Securities
U.S. Treasury securities and agency debentures
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Fixed Income Securities
State and municipal
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Fixed Income Securities
State and municipal
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Fixed Income Securities
Debt securities, other
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Fixed Income Securities
Debt securities, other
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Cash equivalents and other
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Cash equivalents and other
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Restricted cash equivalents
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Restricted cash equivalents
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Commodity Contract
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Commodity Contract
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Interest Rate Contract
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Interest Rate Contract
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Equity Securities
Large cap
United States
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Equity Securities
Large cap
United States
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Equity Securities
Equity securities, other
United States
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Equity Securities
Equity securities, other
United States
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
Corporate Debt Securities
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
Corporate Debt Securities
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
U.S. Treasury securities and agency debentures
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
U.S. Treasury securities and agency debentures
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
State and municipal
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
State and municipal
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
Debt securities, other
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Fixed Income Securities
Debt securities, other
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Cash equivalents and other
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Cash equivalents and other
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Restricted cash equivalents
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 1
Restricted cash equivalents
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Commodity Contract
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Commodity Contract
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Interest Rate Contract
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Interest Rate Contract
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Equity Securities
Large cap
United States
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Equity Securities
Large cap
United States
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Equity Securities
Equity securities, other
United States
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Equity Securities
Equity securities, other
United States
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
Corporate Debt Securities
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
Corporate Debt Securities
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
U.S. Treasury securities and agency debentures
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
U.S. Treasury securities and agency debentures
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
State and municipal
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
State and municipal
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
Debt securities, other
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Fixed Income Securities
Debt securities, other
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Cash equivalents and other
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Cash equivalents and other
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Restricted cash equivalents
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 2
Restricted cash equivalents
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Commodity Contract
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Commodity Contract
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Interest Rate Contract
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Interest Rate Contract
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Equity Securities
Large cap
United States
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Equity Securities
Large cap
United States
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Equity Securities
Equity securities, other
United States
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Equity Securities
Equity securities, other
United States
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
Corporate Debt Securities
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
Corporate Debt Securities
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
U.S. Treasury securities and agency debentures
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
U.S. Treasury securities and agency debentures
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
State and municipal
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
State and municipal
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
Debt securities, other
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Fixed Income Securities
Debt securities, other
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Cash equivalents and other
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Cash equivalents and other
Jun. 30, 2012
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Restricted cash equivalents
Dec. 31, 2011
Virginia Electric and Power Company
Fair Value, Measurements, Recurring
Level 3
Restricted cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                                                                                                                                                                                                                                                                                                                                                                                  
Derivative Assets $ 170     $ 756 $ 965 $ 93 $ 105                                         $ 13 $ 44 $ 0 $ 0                                         $ 573 $ 828 $ 93 $ 105                                         $ 170 $ 93 $ 0 $ 0                                         $ 9 $ 2                                         $ 0 $ 0                                         $ 3 $ 0                                         $ 6 $ 2                                    
Investments               1,967 [1] 1,718 [1] 11 [1] 10 [1] 57 [1] 51 [1] 318 [1] 332 [1] 486 [1] 458 [1] 357 [1] 329 [1] 11 [1] 23 [1] 75 [1] 60 [1] 49 [1] 141 [1]             1,967 [1] 1,718 [1] 11 [1] 10 [1] 57 [1] 51 [1] 0 [1] 0 [1] 332 [1] 277 [1] 0 [1] 0 [1] 0 [1] 0 [1] 1 [1] 0 [1] 0 [1] 0 [1]             0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 318 [1] 332 [1] 154 [1] 181 [1] 357 [1] 329 [1] 11 [1] 23 [1] 74 [1] 60 [1] 49 [1] 141 [1]             0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1]             775 [1] 679 [1] 26 [1] 23 [1] 194 [1] 214 [1] 202 [1] 170 [1] 144 [1] 125 [1] 7 [1] 16 [1] 30 [1] 40 [1] 11 [1] 32 [1]             775 [1] 679 [1] 26 [1] 23 [1] 0 [1] 0 [1] 138 [1] 107 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1]             0 [1] 0 [1] 0 [1] 0 [1] 194 [1] 214 [1] 64 [1] 63 [1] 144 [1] 125 [1] 7 [1] 16 [1] 30 [1] 40 [1] 11 [1] 32 [1]             0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1] 0 [1]
Total assets   4,180 4,192                                             2,381 2,100                                             1,629 1,999                                             170 93                                             1,398 1,301                                         939 809                                         453 490                                         6 2                                        
Derivative Liabilities       515 888 138 269                                         8 10 0 0                                         440 714 138 269                                         67 164 0 0                                         6 47 92 100                                     0 0 0 0                                     3 17 92 100                                     3 30 0 0                                
Total liabilities   $ 653 $ 1,157                                             $ 8 $ 10                                             $ 578 $ 983                                             $ 67 $ 164                                             $ 98 $ 147                                         $ 0 $ 0                                         $ 95 $ 117                                         $ 3 $ 30                                        
[1] Includes investments held in the nuclear decommissioning and rabbi trusts.