Discontinued Operations (Consolidated Statement of Cash Flows - Discontinued Operations) (Details) - USD ($) $ in Millions		6 Months Ended
May 15, 2020	Jun. 30, 2020	Jun. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net proceeds from sale of BlackRock		$ 14,225
Net cash provided by discontinued operations		14,299	$ 159
BlackRock, Inc. \| Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net cash provided (used) by operating activities of discontinued operations		74	$ 159
Net proceeds from sale of BlackRock	$ 14,200	$ 14,225

Amount of cash inflow (outflow) of operating activities of discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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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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Increase (decrease) in cash associated with the entity's discontinued operations.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

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