OTHER FINANCIAL DATA - EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Basic earnings per common share		$ 0.06	$ 1.19	$ 1.34	$ 2.95
Weighted-average common shares outstanding for basic EPS	[1]	250,096,000	248,108,000	249,915,000	247,916,000
Diluted earnings per common share		$ 0.06	$ 1.17	$ 1.33	$ 2.91
Weighted-average common shares outstanding for diluted EPS		251,938,000	251,491,000	251,686,000	251,264,000
Vested RSUs included in basic WASO		568,000	501,000	562,000	476,000
Dilutive effect of stock options, restricted stock awards and restricted stock units		1,842,000	3,383,000	1,771,000	3,348,000
Shares excluded from potential dilutive shares		1,417,481	1,370,460	1,491,195	1,424,855
Earnings		$ 16	$ 295	$ 335	$ 732
Out Of The Money Stock Options [Member]
Antidilutive Securities Excluded From Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share		0	0	0	0
Employee Stock Option [Member]
Antidilutive Securities Excluded From Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share		0	0	0	0
Restricted Stock [Member]
Antidilutive Securities Excluded From Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share		0	0	0	0
Restricted Stock Units [Member]
Antidilutive Securities Excluded From Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share		1,010	4,715	2,408	4,715

[1] Includes 568 and 501 average fully vested restricted stock units held in our Deferred Compensation Plan for the three months ended June 30, 2016 and 2015, respectively, and 562 and 476 of such units for the six months ended June 30, 2016 and 2015, respectively. These fully vested restricted stock units are included in weighted-average common shares outstanding for basic EPS because there are no conditions under which the corresponding shares will not be issued.