SUBSEQUENT EVENTS (Details) (USD $)	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Apr. 30, 2015	Feb. 12, 2015
Subsequent events
Cash dividend declared per common share (in dollars per share)	$ 0.125	$ 0.125
Common Stock
Subsequent events
Common stock authorized to be repurchased remaining amount	$ 1,100,000,000
Increase in aggregate repurchase authorization purchase amount				2,500,000,000
Subsequent event | Common Stock
Subsequent events
Cash dividend declared per common share (in dollars per share)			$ 0.125
Common stock authorized to be repurchased remaining amount			3,800,000,000
Increase in aggregate repurchase authorization purchase amount			3,500,000,000
Subsequent event | Junior Subordinated Debentures
Subsequent events
Aggregate principal amount of debt issued			1,250,000,000
Repurchased face amount			915,000,000
Subsequent event | Senior notes and debentures
Subsequent events
Aggregate principal amount of debt issued			66,000,000
Repurchased face amount			$ 61,000,000