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Commitments and Guarantees Unrecorded Unconditional Purchase Obligations (Details) $ in Millions | Dec. 31, 2021 USD ($)
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Capital Addition Purchase Commitments [Member] |
Unrecorded Unconditional Purchase Obligation [Line Items] |
Unrecorded Unconditional Purchase Obligation | $ 257
Unrecorded Unconditional Purchase Obligation, Due within One Year | 146
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 58
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 7
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 2
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 1
Unrecorded Unconditional Purchase Obligation, Due after Five Years | 43
Long-term Contract for Purchase of Electric Power [Domain] |
Unrecorded Unconditional Purchase Obligation [Line Items] |
Unrecorded Unconditional Purchase Obligation | 4,073
Unrecorded Unconditional Purchase Obligation, Due within One Year | 486
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 353
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 367
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 341
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 242
Unrecorded Unconditional Purchase Obligation, Due after Five Years | 2,284
Electric Transmission [Member] |
Unrecorded Unconditional Purchase Obligation [Line Items] |
Unrecorded Unconditional Purchase Obligation | 190
Unrecorded Unconditional Purchase Obligation, Due within One Year | 18
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 22
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 23
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 27
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 12
Unrecorded Unconditional Purchase Obligation, Due after Five Years | 88
Public Utility Districts [Member] |
Unrecorded Unconditional Purchase Obligation [Line Items] |
Unrecorded Unconditional Purchase Obligation | 89
Unrecorded Unconditional Purchase Obligation, Due within One Year | 13
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 12
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 12
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 11
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 10
Unrecorded Unconditional Purchase Obligation, Due after Five Years | 31
Natural gas [Member] |
Unrecorded Unconditional Purchase Obligation [Line Items] |
Unrecorded Unconditional Purchase Obligation | 440
Unrecorded Unconditional Purchase Obligation, Due within One Year | 81
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 44
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 39
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 38
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 36
Unrecorded Unconditional Purchase Obligation, Due after Five Years | 202
Coal and transportationSupply Agreements [Member] |
Unrecorded Unconditional Purchase Obligation [Line Items] |
Unrecorded Unconditional Purchase Obligation | 108
Unrecorded Unconditional Purchase Obligation, Due within One Year | 27
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 27
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 27
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 27
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 0
Unrecorded Unconditional Purchase Obligation, Due after Five Years | 0
Commitments [Member] |
Unrecorded Unconditional Purchase Obligation [Line Items] |
Unrecorded Unconditional Purchase Obligation | 5,157
Unrecorded Unconditional Purchase Obligation, Due within One Year | 771
Unrecorded Unconditional Purchase Obligation, Due within Two Years | 516
Unrecorded Unconditional Purchase Obligation, Due within Three Years | 475
Unrecorded Unconditional Purchase Obligation, Due within Four Years | 446
Unrecorded Unconditional Purchase Obligation, Due within Five Years | 301
Unrecorded Unconditional Purchase Obligation, Due after Five Years | $ 2,648

X
- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in 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 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308 + Details
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X
- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in next 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 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308 + Details
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X
- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation 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 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308 + Details
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X
- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation 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 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308 + Details
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X
- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation 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 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308 + Details
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- Definition Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308 + Details
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- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308 + Details
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