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Acquisitions and Dispositions (Schedule of Preliminary Allocation of Purchase Price to Assets Acquired and Liabilities Assumed) (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jan. 31, 2019
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]        
Goodwill [1] $ 7,405 $ 7,381 $ 7,395  
SCANA        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]        
Total current assets [2]     1,782  
Investments [3]     224  
Property, plant and equipment [4],[5]     11,006  
Goodwill     2,609  
Regulatory assets [6]     3,940  
Other deferred charges and other assets, including intangible assets [7]     430  
Total Assets     19,991  
Total current liabilities [8]     1,556  
Total outstanding debt     6,707 $ 6,900
Deferred income taxes     1,068  
Regulatory liabilities     2,706  
Other deferred credits and other liabilities [9]     1,115  
Total Liabilities     13,152  
Total purchase price [10]     $ 6,839  
[1] Goodwill amounts do not contain any accumulated impairment losses.
[2] Includes $389 million of cash, restricted cash and equivalents, of which $115 million is considered restricted.
[3] Includes $31 million for equity method investments. The fair value adjustment on the equity method investments is considered to be equity method goodwill and is not amortized.
[4] Includes $105 million of certain property, plant and equipment associated with the NND Project for which Dominion Energy committed to forgo recovery in accordance with the SCANA Merger Approval Order. As a result, Dominion Energy’s Consolidated Statements of Income for the year ended December 31, 2019 include a charge of $105 million ($79 million after-tax), included in impairment of assets and other charges (reflected in the Corporate and Other segment).
[5] Nonregulated property, plant and equipment, excluding land, will be depreciated on a straight-line basis over the remaining useful lives of such property, primarily ranging from 5 to 78 years.
[6] Includes $258 million of certain income tax-related regulatory assets associated with the NND Project for which Dominion Energy committed to forgo recovery in accordance with the SCANA Merger Approval Order. See Note 5 for additional information.
[7] Intangible assets have an estimated weighted-average amortization period of approximately five years.
[8] Includes $40 million outstanding under letters of credit advances, which were repaid in January 2019, as well as $173 million outstanding commercial paper under various credit facilities. All such credit facilities were terminated in 2019.
[9] Includes a $379 million pension and other postretirement benefit liability.
[10] Includes stock-based compensation awards with a fair value of $21 million.