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Commitments, Guarantees and Contingencies - Legal and Regulatory Proceedings (Details)	12 Months Ended
	Dec. 31, 2018 claim
Pending Litigation
Entity Information [Line Items]
Number of putative class action lawsuits	2

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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.

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No definition available.

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- Definition

Loss Contingency, Pending Claims, Number1

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No definition available.

+ Details

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- Details

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