STOCKHOLDERS’ EQUITY AND REDEEMABLE NONCONTROLLING INTEREST (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended							9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2015	Sep. 30, 2014	Jul. 01, 2015
Schedule of Stockholders' Equity and Redeemable Noncontrolling Interest [Line Items]
Dividends per common share	$ 0.38	$ 0.38	$ 0.38	$ 0.33	$ 0.33	$ 0.33	$ 0.33	$ 1.14	$ 0.99
Share repurchase authorization remaining available	$ 522							$ 522
Treasury stock value acquired cost method								$ 174	$ 82
Reissuance of shares for employee benefit plan	0.1				0.6			1.3	1.4
Redeemable noncontrolling interest	$ 69			$ 0				$ 69
UMass [Member]
Schedule of Stockholders' Equity and Redeemable Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners										18.90%
Subsidiaries [Member] | UMass [Member]
Schedule of Stockholders' Equity and Redeemable Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners										18.90%
Share Repurchases Open Market [Member]
Schedule of Stockholders' Equity and Redeemable Noncontrolling Interest [Line Items]
Treasury stock shares acquired	0.3				0.4			2.4	1.5
Treasury stock acquired average cost per share	$ 69.24				$ 62.03			$ 71.27	$ 56.84
Treasury stock value acquired cost method	$ 25				$ 25			$ 174	$ 82