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Commitments, Contingencies and Guarantees (Maximum Potential Obligation) (Details) $ in Millions	Mar. 31, 2021 USD ($)
Commitment Period Two Thousand Thirty Four [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 1,243
Commitment Period Two Thousand Thirty Five [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	2,458
Commitment Period Two Thousand Thirty Six [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	3,599
Commitment Period Two Thousand Thirty Seven
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	2,850
Commitment Period Two Thousand Thirty Eight
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	2,300
Commitment Period Two Thousand Thirty Nine
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	11,351
Commitment Period Two Thousand Forty Six
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 3,000

X

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248

+ Details

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X

- Definition

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+ References

No definition available.

+ Details

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