XML 150 R121.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Investments (Equity and Debt Securities and Cash Equivalents and Cost Method Investments in Decommissioning Trust Funds) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Investment Holdings [Line Items]    
Amortized Cost, Total $ 3,691 $ 3,348
Total Unrealized Gains 2,523 1,662
Total Unrealized Losses [1] (22) (72)
Fair Value, Total 6,192 4,938
Fixed income securities Fair Value 1,727  
Fixed Income    
Investment Holdings [Line Items]    
Cash equivalents and other Amortized Cost 13 [2] 4
Cash equivalents and other Fair Value 13 [2] 4
Common/collective trust funds | Fixed Income    
Investment Holdings [Line Items]    
Fixed income securities Amortized Cost, Total [3] 115 76
Fixed income securities Total Unrealized Gains 4 [3] 0
Fixed income securities Fair Value [3] 119 76
Equity securities: | U.S.    
Investment Holdings [Line Items]    
Equity securities Amortized Cost, [4] 1,807 [3] 1,741
Equity securities Total Unrealized Gains [4] 2,451 [3] 1,640
Equity securities Total Unrealized Losses [4] (20) [3] (51)
Equity securities Fair Value [4] 4,238 [3] 3,330
Corporate debt instruments | Fixed Income    
Investment Holdings [Line Items]    
Fixed income securities Amortized Cost, Total [3] 434 435
Fixed income securities Total Unrealized Gains [3] 29 5
Fixed income securities Total Unrealized Losses [3]   (9)
Fixed income securities Fair Value [3] 463 431
Government Securities | Fixed Income    
Investment Holdings [Line Items]    
Fixed income securities Amortized Cost, Total [3] 1,108 1,092
Fixed income securities Total Unrealized Gains [3] 39 17
Fixed income securities Total Unrealized Losses [3] (2) (12)
Fixed income securities Fair Value [3] 1,145 1,097
Insurance contracts    
Investment Holdings [Line Items]    
Amortized Cost, Total 214  
Fair Value, Total 214  
Virginia Electric and Power Company    
Investment Holdings [Line Items]    
Amortized Cost, Total 1,721 1,643
Total Unrealized Gains 1,173 760
Total Unrealized Losses (13) [1],[5] (34)
Fair Value, Total 2,881 2,369
Fixed income securities Fair Value 853  
Virginia Electric and Power Company | Common/collective trust funds | Fixed Income    
Investment Holdings [Line Items]    
Fixed income securities Amortized Cost, Total [3] 51 51
Fixed income securities Fair Value [3] 51 51
Virginia Electric and Power Company | Cash Equivalents and Other [Member]    
Investment Holdings [Line Items]    
Cash equivalents and other Amortized Cost 1 6 [3],[6]
Cash equivalents and other Fair Value 1 6 [3],[6]
Virginia Electric and Power Company | Equity securities: | U.S.    
Investment Holdings [Line Items]    
Equity securities Amortized Cost, 894 [4] 858
Equity securities Total Unrealized Gains 1,144 [4] 751
Equity securities Total Unrealized Losses (11) [4] (24)
Equity securities Fair Value 2,027 [4] 1,585
Virginia Electric and Power Company | Corporate debt instruments | Fixed Income    
Investment Holdings [Line Items]    
Fixed income securities Amortized Cost, Total [3] 241 224
Fixed income securities Total Unrealized Gains [3] 15 2
Fixed income securities Total Unrealized Losses [3]   (5)
Fixed income securities Fair Value [3] 256 221
Virginia Electric and Power Company | Government Securities | Fixed Income    
Investment Holdings [Line Items]    
Fixed income securities Amortized Cost, Total [3] 534 504
Fixed income securities Total Unrealized Gains [3] 14 7
Fixed income securities Total Unrealized Losses [3] (2) (5)
Fixed income securities Fair Value [3] $ 546 $ 506
[1] The fair value of securities in an unrealized loss position was $298 million and $833 million at December 31, 2019 and 2018, respectively.
[2] Includes pending purchases of securities of $1 million at December 31, 2019.
[3] Unrealized gains and losses on fixed income securities are included in AOCI and the nuclear decommissioning trust regulatory liability as discussed in Note 2.
[4] Unrealized gains and losses on equity securities are included in other income and the nuclear decommissioning trust regulatory liability as discussed in Note 2.
[5] The fair value of securities in an unrealized loss position was $185 million and $404 million at December 31, 2019 and 2018, respectively.
[6] Includes pending sales of securities of $6 million at December 31, 2018.