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Revenue from contracts with customers transaction price allocated to significant unsatisfied remaining performance obligations and timing of when performance obligations expected to be satisfied (Detail) $ in Millions | Jun. 30, 2025 USD ($)
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Electricity and Natural Gas [Member] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Transaction price allocated to remaining performance obligations | $ 22,128
Electricity and Natural Gas [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Transaction price allocated to remaining performance obligations | $ 3,475
Performance obligations expected to be satisfied, period | 1 year
Electricity and Natural Gas [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Transaction price allocated to remaining performance obligations | $ 18,653
Performance obligations expected to be satisfied, period |
Other Sales and Service Contracts [Member] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Transaction price allocated to remaining performance obligations | $ 8,161
Other Sales and Service Contracts [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Transaction price allocated to remaining performance obligations | $ 3,475
Performance obligations expected to be satisfied, period | 1 year
Other Sales and Service Contracts [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Transaction price allocated to remaining performance obligations | $ 4,686
Performance obligations expected to be satisfied, period |

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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(1) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 + Details
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