CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Millions		Mar. 31, 2021	Dec. 31, 2020
Other short-term Investments	[1]	$ 34,187	$ 33,399
ALLL	[1]	(2,208)	(2,453)
Other assets	[1]	10,858	10,749
Other liabilities	[1]	3,881	3,409
Long-term debt	[1]	14,743	14,973
Available-for-sale debt and other securities, amortized cost		35,963	34,982
Held-to-maturity securities, fair value	[2]	10	11
Bank premises and equipment held for sale		27	35
Interest checking deposits held for sale		$ 354	$ 351
Common stock, par value (in dollars per share)		$ 2.22	$ 2.22
Common stock, shares authorized (in shares)		2,000,000,000	2,000,000,000
Common stock, outstanding (in shares)		711,595,529	712,760,325
Treasury stock, shares (in shares)		212,297,052	211,132,256
Preferred stock, authorized (in shares)		500,000	500,000
Preferred stock, unissued (in shares)		422,000	422,000
Preferred stock, liquidation preference per share (in dollars per share)		$ 25,000	$ 25,000
Preferred Class B
Preferred stock, authorized (in shares)		500,000	500,000
Preferred stock, unissued (in shares)		300,000	300,000
Preferred stock, liquidation preference per share (in dollars per share)		$ 1,000	$ 1,000
Commercial
ALLL		$ (1,329)	$ (1,456)
Loans held for sale		9	0
Residential Mortgage
ALLL		(247)	(294)
Loans held for sale		1,801	1,481
Loans measured at FV		153	161
Variable Interest Entity, Primary Beneficiary | Automobile loan
Other short-term Investments		54	55
Portfolio loans and leases		633	756
ALLL		(5)	(7)
Other assets		4	5
Other liabilities		1	2
Long-term debt		$ 540	$ 656

[1] Includes $54 and $55 of other short-term investments, $633 and $756 of portfolio loans and leases, $(5) and $(7) of ALLL, $4 and $5 of other assets, $1 and $2 of other liabilities, and $540 and $656 of long-term debt from consolidated VIEs that are included in their respective captions above at March 31, 2021 and December 31, 2020, respectively. For further information, refer to Note 11.

[2] Fair value of $10 and $11 at March 31, 2021 and December 31, 2020, respectively.