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Long-Term Investments (Schedule Of Net Investment In Leveraged Leases) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Schedule of Investments [Line Items] |  |  |
Maximum U.S. Corporate Income Tax Rate |  | 35.00% |
Lease Receivables (net of Non-Recourse Debt) |  | $ 546 | $ 629
Estimated Residual Value of Leased Assets |  | 326 | 346
Total Investment in Rental Receivables |  | 872 | 975
Unearned and Deferred Income |  | (307) | (326)
Gross Investment in Leases |  | 565 | 649
Deferred Tax Liabilities |  | (480) | (674)
Net Investments in Leases |  | $ 85 | $ (25)
Subsequent Event [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Maximum U.S. Corporate Income Tax Rate | 21.00% |  |

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- Definition Leveraged Leases Net Investment In Leveraged Leases Disclosure Investment In Leveraged Leases, Gross + References No definition available. + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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- Definition The estimated portion of pretax income and investment tax credit remaining to be allocated to income over the lease term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 30 -Paragraph 14 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=77895730&loc=d3e42840-112730 + Details
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- Definition Taxes arising from arrangements meeting the criteria for classification as leveraged leases due to timing differences between accounting and tax income recognition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 35 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=77915205&loc=d3e43930-112732 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77907235&loc=d3e45152-112736 + Details
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- Definition The net investment in arrangements meeting the criteria for classification as leveraged leases including deferred taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 30 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=77895730&loc=d3e42840-112730 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 35 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=77915205&loc=d3e43930-112732 + Details
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- Definition The gross rentals receivable equal to the future cash flows from the lessee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 25 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=77899714&loc=d3e42229-112728 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 30 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77895730&loc=d3e42840-112730 + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 30 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77895730&loc=d3e42840-112730 + Details
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- Definition The estimate of the value of the leased asset at the end of the lease term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 30 -Paragraph 14 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=77895730&loc=d3e42840-112730 + 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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