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Commitments and Contingent Liabilities Variable Interest Entities (Details) $ in Millions | Mar. 31, 2020 USD ($)
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Other Assets [Member] |
Variable Interest Entity [Line Items] |
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net | $ 258
Other Liabilities [Member] |
Variable Interest Entity [Line Items] |
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net | $ 77

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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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Balance Type: | na
Period Type: | duration

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- Definition Net carrying amount of the assets and liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), when the reporting entity is not the VIE's primary beneficiary. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |