Investment Securities (Investment) (Details) - USD ($) $ in Millions		6 Months Ended	12 Months Ended
		Jun. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		$ 34,367	$ 28,783
Gross unrealized gains		5,486	3,599
Gross unrealized losses		(133)	(409)
Estimated fair value		39,720	31,973
Investments		39,720	31,973
Eliminations
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		(4)	(4)
Gross unrealized gains		0	0
Gross unrealized losses		0	0
Estimated fair value		(4)	(4)
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments		19
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Investments		535
GE
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		103	139
Gross unrealized gains		11	14
Gross unrealized losses		(4)	(2)
Estimated fair value		110	151
Investments	[1]	110	151
GE | US Corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		4	2
Gross unrealized gains		0	0
Gross unrealized losses		0	0
Estimated fair value		4	3
GE | Corporate - non-U.S.
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		9	1
Gross unrealized gains		0	0
Gross unrealized losses		0	0
Estimated fair value		9	1
GE | U.S. Government and federal agency
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		49	49
Gross unrealized gains		1	0
Gross unrealized losses		0	0
Estimated fair value		50	49
GE | Available-for-sale Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		41	87
Gross unrealized gains		10	13
Gross unrealized losses		(4)	(2)
Estimated fair value		47	98
GE Capital
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		34,268	28,648
Gross unrealized gains		5,475	3,585
Gross unrealized losses		(128)	(407)
Estimated fair value		39,615	31,827
Investments		39,615	31,827
GE Capital | US Corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		20,718	19,971
Gross unrealized gains		4,177	2,669
Gross unrealized losses		(51)	(285)
Estimated fair value		24,844	22,355
GE Capital | State and municipal
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		3,885	3,910
Gross unrealized gains		731	407
Gross unrealized losses		(48)	(73)
Estimated fair value		4,568	4,245
GE Capital | Mortgage and asset-backed
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		2,957	2,995
Gross unrealized gains		188	157
Gross unrealized losses		(23)	(35)
Estimated fair value		3,122	3,116
GE Capital | Corporate - non-U.S.
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		5,299	759
Gross unrealized gains		108	96
Gross unrealized losses		(4)	(9)
Estimated fair value		5,402	846
GE Capital | Government - non-U.S.
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		608	279
Gross unrealized gains		156	136
Gross unrealized losses		(1)	0
Estimated fair value		764	415
GE Capital | U.S. Government and federal agency
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		694	623
Gross unrealized gains		96	104
Gross unrealized losses		0	0
Estimated fair value		790	727
GE Capital | Available-for-sale Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		107	112
Gross unrealized gains		19	16
Gross unrealized losses		(1)	(4)
Estimated fair value		$ 125	$ 123

[1] Represents the adding together of all affiliated companies except GE Capital, which is presented on a one-line basis. See Note 1.