Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Securities borrowed at fair value	$ 29,771	$ 26,279
Customer and other receivables at fair value	53	53
Trading assets, at fair value pledged as collateral	59,128	66,605
Investment at fair value	62,655	57,827
Investment at pledged collateral	10,765	10,968
Net allowance of loan	2,868	1,441
Loans receivable at fair value	13,829	14,386
Deposits at fair value	24,722	17,765
Securities loaned at fair value	1,148	714
Other secured financings at fair value	29,991	18,071
Unsecured short-term borrowings, including the current portion of unsecured long-term borrowings, at fair value	18,983	26,007
Unsecured long-term borrowings at fair value	43,313	43,661
Other liabilities and accrued expenses at fair value	327	150
Preferred stock, liquidation preference	$ 11,203	$ 11,203
Common stock, shares issued	901,409,000	896,782,650
Common stock, shares outstanding	343,856,654	347,343,184
Treasury stock, shares	557,552,348	549,439,468

Investments pledged as collateral amount eligible to be repledged by counter party.

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Other secured financings at fair value.

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Trading assets pledged as collateral amount eligible to be repledged by counterpart.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Fair value portion of other liabilities.

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Value of the difference between preference in liquidation and the par or stated values of the preferred shares.

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Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables.

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Fair value portion of securities borrowed from other entities.

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Fair value portion of securities that an entity sells and agrees to repurchase at a specified date for a specified price.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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