INVESTMENTS - Recognition and Measurement of OTTI (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
OTTI on Investments disclosures
Total OTTI losses recognized during the period		$ 1	$ 11	$ 1	$ 13
Less: Impairments recognized in AOCI	[1]	0	8	0	8
Net impairment losses recognized in earnings for securities that the Company does not intend to sell nor will likely be required to sell		1	3	1	5
Impairment losses recognized in earnings for securities that the Company intends to sell or more- likely-than-not will be required to sell before recovery		79	88	194	324
Net impairment losses recognized in earnings	[1]	80	91	195	329
Securities available-for-sale (AFS)
OTTI on Investments disclosures
Total OTTI losses recognized during the period		1	11	1	13
Less: Impairments recognized in AOCI		0	8	0	8
Net impairment losses recognized in earnings for securities that the Company does not intend to sell nor will likely be required to sell		1	3	1	5
Impairment losses recognized in earnings for securities that the Company intends to sell or more- likely-than-not will be required to sell before recovery		64	88	152	324
Net impairment losses recognized in earnings		65	91	153	329
Held-to-maturity Securities
OTTI on Investments disclosures
Total OTTI losses recognized during the period		0	0	0	0
Less: Impairments recognized in AOCI		0	0	0	0
Net impairment losses recognized in earnings for securities that the Company does not intend to sell nor will likely be required to sell		0	0	0	0
Impairment losses recognized in earnings for securities that the Company intends to sell or more- likely-than-not will be required to sell before recovery		14	0	36	0
Net impairment losses recognized in earnings		14	0	36	0
Other assets
OTTI on Investments disclosures
Total OTTI losses recognized during the period		0	0	0	0
Less: Impairments recognized in AOCI		0	0	0	0
Net impairment losses recognized in earnings for securities that the Company does not intend to sell nor will likely be required to sell		0	0	0	0
Impairment losses recognized in earnings for securities that the Company intends to sell or more- likely-than-not will be required to sell before recovery		1	0	6	0
Net impairment losses recognized in earnings		$ 1	$ 0	$ 6	$ 0

[1] Certain prior-period revenue and expense lines and totals were reclassified to conform to the current period’s presentation. See Note 3 to the Consolidated Financial Statements.