CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Other short-term Investments	[1]	$ 34,203	$ 33,399
ALLL	[1]	(1,954)	(2,453)
Other assets	[1]	11,889	10,749
Other liabilities	[1]	5,339	3,409
Long-term debt	[1]	11,419	14,973
Available-for-sale debt and other securities, amortized cost		36,308	34,982
Held-to-maturity securities		8	11
Bank premises and equipment held for sale		$ 25	35
Interest checking deposits held for sale			$ 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)		689,790,194	712,760,325
Treasury stock, shares (in shares)		234,102,387	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
Residential Mortgage
ALLL		$ (235)	$ (294)
Loans held for sale		1,532	1,481
Loans measured at FV		156	161
Variable Interest Entity, Primary Beneficiary | Automobile loan
Other short-term Investments		27	55
Portfolio loans and leases		383	756
ALLL		(3)	(7)
Other assets		2	5
Other liabilities		1	2
Long-term debt		$ 325	$ 656

[1] Includes $27 and $55 of other short-term investments, $383 and $756 of portfolio loans and leases, $(3) and $(7) of ALLL, $2 and $5 of other assets, $1 and $2 of other liabilities, and $325 and $656 of long-term debt from consolidated VIEs that are included in their respective captions above at September 30, 2021 and December 31, 2020, respectively. For further information, refer to Note 12.