INVESTMENTS - Recognition and Measurement of OTTI (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
OTTI on Investments disclosures
Total OTTI losses recognized during the period		$ 0	$ 2	$ 0	$ 2
Less: Impairments recognized in AOCI	[1]	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	2	0	2
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		43	35	115	236
Net impairment losses recognized in earnings	[1]	43	37	115	238
Securities available-for-sale (AFS)
OTTI on Investments disclosures
Total OTTI losses recognized during the period		0	2	0	2
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	2	0	2
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		19	35	88	236
Net impairment losses recognized in earnings		19	37	88	238
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		19	0	22	0
Net impairment losses recognized in earnings		19	0	22	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		5	0	5	0
Net impairment losses recognized in earnings		$ 5	$ 0	$ 5	$ 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.