OTHER FINANCIAL DATA - EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share Numerator [Abstract]
Earnings		$ 248	$ 348	$ 980	$ 864
Earnings Per Share Denominator [Abstract]
Weighted-average common shares outstanding for basic EPS	[1]	248,432,000	246,137,000	248,090,000	245,703,000
Weighted-average common shares outstanding for diluted EPS		251,024,000	250,771,000	250,665,000	250,278,000
Vested RSUs included in basic WASO		504,000	222,000	486,000	209,000
Dilutive effect of stock options, restricted stock awards and restricted stock units		2,592,000	4,634,000	2,575,000	4,575,000
Earnings Per Share [Abstract]
Basic earnings per common share		$ 1	$ 1.41	$ 3.95	$ 3.52
Diluted earnings per common share		$ 0.99	$ 1.39	$ 3.91	$ 3.45
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares excluded from potential dilutive shares		2,001,020	844,251	2,047,656	971,943
Performance RSU minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage		0.00%
Performance RSU max prior to 2014 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage		150.00%
Performance RSU max in 2014 and after [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage		200.00%
Service and Other Awards max [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage		100.00%
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		0	0	0	0

[1] Includes fully vested restricted stock units of 504 and 222 held in our Deferred Compensation Plan for the three months ended September 30, 2015 and 2014, respectively, and 486 and 209 for the nine months ended September 30, 2015 and 2014, 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.