Commitments, Contingencies and Guarantees (Maximum Potential Obligation) (Details) $ in Millions	Jun. 30, 2024 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	1,903
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	5,100
Commitment Period Two Thousand Thirty Eight
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	2,550
Commitment Period Two Thousand Thirty Nine
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	8,751
Commitment Period Two Thousand Forty Six
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	3,000
Commitment Period Two Thousand Forty One
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	720
Commitment Period Two Thousand Forty Nine
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 4,750