Other Comprehensive Income, Components of Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Investment securities:
Net unrealized gains (losses) arising during the period	$ (1,969)	$ 2,085	$ (1,576)	$ 4,810
Net unrealized gains arising during the period, Tax effect	678	(836)	631	(1,829)
Net unrealized gains arising during the period, Net of tax	(1,291)	1,249	(945)	2,981
Reclassification of net gains to net income, Before tax	(218)	(150)	(518)	(544)
Reclassification of net gains to net income, Tax effect	82	56	195	205
Reclassification of net gains to net income, Net of tax	(136)	(94)	(323)	(339)
Net change, Before tax	(2,187)	1,935	(2,094)	4,266
Net change, Tax effect	760	(780)	826	(1,624)
Net change, Net of tax	(1,427)	1,155	(1,268)	2,642
Derivatives and hedging activities:
Net unrealized gains (losses) arising during the period	(488)	212	464	256
Net unrealized gains arising during the period, Tax effect	184	(80)	(175)	(97)
Net unrealized gains arising during the period, Net of tax	(304)	132	289	159
Reclassification of net (gains) losses on cash flow hedges to net income, Before tax	(268)	(115)	(502)	(221)
Reclassification of net (gains) losses on cash flow hedges to net income, Tax effect	101	44	190	84
Reclassification of net (gains) losses on cash flow hedges to net income, Net of tax	(167)	(71)	(312)	(137)
Net change, Before tax	(756)	97	(38)	35
Net change, Tax effect	285	(36)	15	(13)
Net change, Net of tax	(471)	61	(23)	22
Defined benefit plans adjustments:
Net actuarial losses arising during the period	0	(12)	(11)	(12)
Net actuarial losses arising during the period, Tax effect	0	5	4	5
Net actuarial losses arising during the period, Net of tax	0	(7)	(7)	(7)
Amortization of net actuarial loss, Before tax	30	18	61	37
Amortization of net actuarial loss, Tax effect	(11)	(7)	(23)	(14)
Amortization of net actuarial loss, Net of tax	19	11	38	23
Settlements and other, Before tax	0	2	12	1
Settlements and other, Tax effect	0	(1)	(5)	(1)
Settlements and other, Net of tax	0	1	7	0
Reclassification of amounts to net periodic benefit costs, Before tax	30	20	73	38
Reclassification of amounts to net periodic benefit costs, Tax effect	(11)	(8)	(28)	(15)
Reclassification of amounts to net periodic benefit costs, Net of tax	19	12	45	23
Net change, Before tax	30	8	62	26
Net change, Tax effect	(11)	(3)	(24)	(10)
Net change, Net of tax	19	5	38	16
Foreign currency translation adjustments:
Net unrealized losses arising during the period, Before tax	10	17	(45)	0
Net unrealized losses arising during the period, Tax effect	6	3	(5)	0
Net unrealized losses arising during the period, Net of tax	16	20	(50)	0
Reclassification of net losses to net income, Net of tax	0	0	0	6
Net change, Before tax	10	17	(45)	6
Net change, Tax effect	6	3	(5)	0
Net change, Net of tax	16	20	(50)	6
Other comprehensive income (loss), before tax	(2,903)	2,057	(2,115)	4,333
Other Comprehensive Income, Tax effect	1,040	(816)	812	(1,647)
Other comprehensive income (loss), net of tax	(1,863)	1,241	(1,303)	2,686
Less: Other comprehensive income (loss) from noncontrolling interests, net of tax	(154)	(124)	147	(45)
Wells Fargo other comprehensive income (loss), net of tax	(1,709)	1,365	(1,450)	2,731
Interest income [Member] | Loans [Member]
Derivatives and hedging activities:
Reclassification of net (gains) losses on cash flow hedges to net income, Before tax	(272)	(130)	(509)	(254)
Reclassification of net (gains) losses on cash flow hedges to net income, Tax effect	103	49	192	96
Reclassification of net (gains) losses on cash flow hedges to net income, Net of tax	(169)	(81)	(317)	(158)
Interest income [Member] | Investment securities [Member]
Investment securities:
Reclassification of net gains to net income, Before tax	1	(11)	(2)	(26)
Reclassification of net gains to net income, Tax effect	0	4	1	10
Reclassification of net gains to net income, Net of tax	1	(7)	(1)	(16)
Derivatives and hedging activities:
Reclassification of net (gains) losses on cash flow hedges to net income, Before tax	(1)	(1)	(2)	(1)
Reclassification of net (gains) losses on cash flow hedges to net income, Tax effect	0	1	1	1
Reclassification of net (gains) losses on cash flow hedges to net income, Net of tax	(1)	0	(1)	0
Gain(Loss) on investments [Member] | Debt Securities [Member]
Investment securities:
Reclassification of net gains to net income, Before tax	(181)	(71)	(459)	(154)
Reclassification of net gains to net income, Tax effect	68	27	173	58
Reclassification of net gains to net income, Net of tax	(113)	(44)	(286)	(96)
Gain(Loss) on investments [Member] | Equity Securities [Member]
Investment securities:
Reclassification of net gains to net income, Before tax	(38)	(68)	(57)	(364)
Reclassification of net gains to net income, Tax effect	14	25	21	137
Reclassification of net gains to net income, Net of tax	(24)	(43)	(36)	(227)
Interest expense on long-term debt [Member]
Derivatives and hedging activities:
Reclassification of net (gains) losses on cash flow hedges to net income, Before tax	5	16	9	34
Reclassification of net (gains) losses on cash flow hedges to net income, Tax effect	(2)	(6)	(3)	(13)
Reclassification of net (gains) losses on cash flow hedges to net income, Net of tax	3	10	6	21
Noninterest income [Member]
Foreign currency translation adjustments:
Reclassification of net losses to net income, Before tax	0	0	0	6
Reclassification of net losses to net income, Tax effect	0	0	0	0
Reclassification of net losses to net income, Net of tax	$ 0	$ 0	$ 0	$ 6