SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
	Aug. 03, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Jul. 31, 2015	Apr. 30, 2015	Feb. 12, 2015
Subsequent events
Interest rate (as a percent)		6.50%		6.50%
Cash dividend declared per common share (in dollars per share)		$ 0.125	$ 0.125	$ 0.25	$ 0.25
Common Stock
Subsequent events
Common stock authorized to be repurchased remaining amount		$ 2,300		$ 2,300			$ 3,800
Increase in aggregate repurchase authorization purchase amount							$ 3,500	$ 0
Subsequent event | Common Stock
Subsequent events
Cash dividend declared per common share (in dollars per share)	$ 0.28
Common stock authorized to be repurchased remaining amount	$ 6,300
Increase in aggregate repurchase authorization purchase amount	$ 5,000
Subsequent event | Senior notes and debentures
Subsequent events
Repurchased face amount						$ 142
Amount of debt repurchased						153
Subsequent event | Senior Notes Due 2025
Subsequent events
Aggregate principal amount of debt issued						$ 1,250
Interest rate (as a percent)						3.75%
Subsequent event | Senior Notes Due 2035
Subsequent events
Aggregate principal amount of debt issued						$ 500
Interest rate (as a percent)						4.70%
Subsequent event | Senior Notes Due 2045
Subsequent events
Aggregate principal amount of debt issued						$ 750
Interest rate (as a percent)						4.80%
Subsequent event | Callable Notes due 2045
Subsequent events
Aggregate principal amount of debt issued						$ 290
Interest rate (as a percent)						4.90%
Subsequent event | Senior Notes and Junior Subordinated Notes
Subsequent events
Repurchased face amount						$ 3,300
Amount of debt repurchased						$ 3,600