Derivatives, Notional or Contractual Amounts (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	$ 83,895	$ 88,474
Fair value asset derivatives, netting	(65,486)	(65,869)
Net amounts in consolidated balance sheet	18,409	22,605
Fair value liability derivatives	81,075	83,781
Fair value liability derivatives, netting	(66,379)	(65,043)
Net amounts in consolidated balance sheet	14,696	18,738
Interest rate contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	61,698	63,698
Fair value asset derivatives, netting	(55,749)	(56,051)
Net amounts in consolidated balance sheet	5,949	7,647
Fair value liability derivatives	58,647	60,059
Fair value liability derivatives, netting	(53,848)	(54,394)
Net amounts in consolidated balance sheet	4,799	5,665
Commodity contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	4,642	7,461
Fair value asset derivatives, netting	(959)	(1,233)
Net amounts in consolidated balance sheet	3,683	6,228
Fair value liability derivatives	5,223	7,702
Fair value liability derivatives, netting	(1,141)	(1,459)
Net amounts in consolidated balance sheet	4,082	6,243
Equity contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	9,117	9,005
Fair value asset derivatives, netting	(3,187)	(2,842)
Net amounts in consolidated balance sheet	5,930	6,163
Fair value liability derivatives	6,328	7,038
Fair value liability derivatives, netting	(2,842)	(2,845)
Net amounts in consolidated balance sheet	3,486	4,193
Foreign exchange contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	7,695	7,404
Fair value asset derivatives, netting	(4,940)	(4,923)
Net amounts in consolidated balance sheet	2,755	2,481
Fair value liability derivatives	9,971	7,827
Fair value liability derivatives, netting	(7,871)	(5,511)
Net amounts in consolidated balance sheet	2,100	2,316
Credit Contracts Protection Sold [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	101	151
Fair value asset derivatives, netting	(92)	(131)
Net amounts in consolidated balance sheet	9	20
Fair value liability derivatives	743	943
Fair value liability derivatives, netting	(606)	(713)
Net amounts in consolidated balance sheet	137	230
Credit Contracts Protection Purchased [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	642	755
Fair value asset derivatives, netting	(559)	(689)
Net amounts in consolidated balance sheet	83	66
Fair value liability derivatives	125	168
Fair value liability derivatives, netting	(71)	(121)
Net amounts in consolidated balance sheet	54	47
Other contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value liability derivatives	38	44
Fair value liability derivatives, netting	0	0
Net amounts in consolidated balance sheet	38	44
Designated as Hedging Instrument [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	6,539	7,288
Fair value liability derivatives	4,430	3,782
Designated as Hedging Instrument [Member] \| Interest rate contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	177,192	148,967
Derivatives (trading and other assets)	6,246	6,536
Fair value liability derivatives	2,299	2,435
Designated as Hedging Instrument [Member] \| Foreign exchange contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	25,751	26,778
Derivatives (trading and other assets)	293	752
Fair value liability derivatives	2,131	1,347
Not Designated as Hedging Instrument [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	77,356	81,186
Fair value liability derivatives	76,645	79,999
Not Designated as Hedging Instrument [Member] \| Free standing derivatives (economic hedges) [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	1,218	1,339
Fair value liability derivatives	1,249	611
Not Designated as Hedging Instrument [Member] \| Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	76,138	79,847
Fair value liability derivatives	75,396	79,388
Not Designated as Hedging Instrument [Member] \| Interest rate contract [Member] \| Free standing derivatives (economic hedges) [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	235,807	221,527
Derivatives (trading and other assets)	620	697
Fair value liability derivatives	664	487
Not Designated as Hedging Instrument [Member] \| Interest rate contract [Member] \| Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	5,052,605	4,378,767
Derivatives (trading and other assets)	54,832	56,465
Fair value liability derivatives	55,684	57,137
Not Designated as Hedging Instrument [Member] \| Commodity contract [Member] \| Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	71,660	88,640
Derivatives (trading and other assets)	4,642	7,461
Fair value liability derivatives	5,223	7,702
Not Designated as Hedging Instrument [Member] \| Equity contract [Member] \| Free standing derivatives (economic hedges) [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	6,444	5,219
Derivatives (trading and other assets)	492	367
Fair value liability derivatives	49	96
Not Designated as Hedging Instrument [Member] \| Equity contract [Member] \| Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	138,804	138,422
Derivatives (trading and other assets)	8,625	8,638
Fair value liability derivatives	6,279	6,942
Not Designated as Hedging Instrument [Member] \| Foreign exchange contract [Member] \| Free standing derivatives (economic hedges) [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	21,897	14,405
Derivatives (trading and other assets)	106	275
Fair value liability derivatives	536	28
Not Designated as Hedging Instrument [Member] \| Foreign exchange contract [Member] \| Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	292,525	253,742
Derivatives (trading and other assets)	7,296	6,377
Fair value liability derivatives	7,304	6,452
Not Designated as Hedging Instrument [Member] \| Credit Contracts Protection Sold [Member] \| Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	10,583	12,304
Derivatives (trading and other assets)	101	151
Fair value liability derivatives	743	943
Not Designated as Hedging Instrument [Member] \| Credit Contracts Protection Purchased [Member] \| Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	17,877	16,659
Derivatives (trading and other assets)	642	755
Fair value liability derivatives	125	168
Not Designated as Hedging Instrument [Member] \| Other contract [Member] \| Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	1,899	1,994
Derivatives (trading and other assets)	0	0
Fair value liability derivatives	$ 38	$ 44

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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