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Leasing (Investments In Operating Leases) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lessee, operating lease, noncancellable lease term |  |  | 367 days |  |
Lessee, operating lease, lease extension, maximum |  |  | 48 months |  |
Operating lease, right-of-use assets | $ 137 |  | $ 137 |  | $ 168
Operating lease, liabilities | 163 |  | 163 |  | $ 196
Cash paid for amounts included in the measurement of lease liabilities | $ 12 | $ 13 | 25 | $ 25 |
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability |  |  | $ 43 | $ 34 |
Operating lease, weighted-average remaining lease term | 6 years | 7 years | 6 years | 7 years |
Operating lease, weighted average discount rate | 2.64% | 2.97% | 2.64% | 2.97% |
Minimum |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Operating lease remaining lease term |  |  | 2 months |  |
Lessee, operating lease, option to terminate |  |  | P2Y |  |
Maximum |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Operating lease remaining lease term |  |  | 9 years |  |
Lessee, operating lease, option to terminate |  |  | P6Y |  |
Land and Building | Minimum |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lessee, Operating Lease, Option to Extend |  |  | P3Y |  |
Land and Building | Maximum |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lessee, Operating Lease, Option to Extend |  |  | P15Y |  |

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- Definition Description of terms and conditions of option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Definition Weighted average remaining lease term for operating lease, 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/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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