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Leases (Scheduled Maturities of Lease Liabilities) (Detail) $ in Millions | Dec. 31, 2022 USD ($)
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Lessee Lease Disclosure [Line Items] |
Maturity of Lease Liabilities, Operating, 2023 | $ 44
Maturity of Lease Liabilities, Operating, 2024 | 36
Maturity of Lease Liabilities, Operating, 2025 | 30
Maturity of Lease Liabilities, Operating, 2026 | 27
Maturity of Lease Liabilities, Operating, 2027 | 25
Maturity of Lease Liabilities, Operating, After 2027 | 642
Maturity of Lease Liabilities, Operating, Total undiscounted lease payments | 804
Present value adjustment, Operating | (251)
Present value of lease liabilities, Operating | 553
Maturity of Lease Liabilities, Finance, 2023 | 52
Maturity of Lease Liabilities, Finance, 2024 | 45
Maturity of Lease Liabilities, Finance, 2025 | 25
Maturity of Lease Liabilities, Finance, 2026 | 20
Maturity of Lease Liabilities, Finance, 2027 | 14
Maturity of Lease Liabilities, Finance, After 2027 | 15
Maturity of Lease Liabilities, Finance, Total undiscounted lease payments | 171
Present value adjustment, Finance | (21)
Present value of lease liabilities, Finance | 150
Virginia Electric and Power Company |
Lessee Lease Disclosure [Line Items] |
Maturity of Lease Liabilities, Operating, 2023 | 23
Maturity of Lease Liabilities, Operating, 2024 | 19
Maturity of Lease Liabilities, Operating, 2025 | 15
Maturity of Lease Liabilities, Operating, 2026 | 12
Maturity of Lease Liabilities, Operating, 2027 | 10
Maturity of Lease Liabilities, Operating, After 2027 | 314
Maturity of Lease Liabilities, Operating, Total undiscounted lease payments | 393
Present value adjustment, Operating | (99)
Present value of lease liabilities, Operating | 294
Maturity of Lease Liabilities, Finance, 2023 | 21
Maturity of Lease Liabilities, Finance, 2024 | 20
Maturity of Lease Liabilities, Finance, 2025 | 17
Maturity of Lease Liabilities, Finance, 2026 | 14
Maturity of Lease Liabilities, Finance, 2027 | 11
Maturity of Lease Liabilities, Finance, After 2027 | 13
Maturity of Lease Liabilities, Finance, Total undiscounted lease payments | 96
Present value adjustment, Finance | (14)
Present value of lease liabilities, Finance | $ 82

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
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