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Financing Receivables (Schedule Of Lease Receivables, Net Of Nonrecourse Debt, Associated With Leveraged Lease Portfolio Based On Counterparty Credit Rating) (Detail) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Guarantor Obligations [Line Items] |  |
Lease Receivables, Net of Non-Recourse Debt | $ 274 | $ 299
Energy Holdings [Member] |  |
Guarantor Obligations [Line Items] |  |
Lease Receivables, Net of Non-Recourse Debt | 274 |
Energy Holdings [Member] | Counterparties' Credit Rating (S&P), AA [Member] |  |
Guarantor Obligations [Line Items] |  |
Lease Receivables, Net of Non-Recourse Debt | 8 |
Energy Holdings [Member] | Standard & Poor's, A- Rating [Member] |  |
Guarantor Obligations [Line Items] |  |
Lease Receivables, Net of Non-Recourse Debt | 51 |
Energy Holdings [Member] | Counterparties' Credit Rating (S&P), BBB plus, BBB, BBB minus [Member] |  |
Guarantor Obligations [Line Items] |  |
Lease Receivables, Net of Non-Recourse Debt | $ 215 |

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- Definition This element represents leveraged lease rentals receivable, net of that portion of the rental applicable to principal and interest on the nonrecourse debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 30 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391856&loc=d3e42840-112730 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123392319&loc=SL77920254-209983 + Details
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