OTHER FINANCIAL DATA - EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Earnings attributable to common shares	$ 622	$ 248	$ 991	$ 980
Weighted-average common shares outstanding for basic EPS (in shares)	250,386,000	248,432,000	250,073,000	248,090,000
Dilutive effect of stock options, restricted stock awards and restricted stock units (in shares)	2,019,000	2,592,000	1,903,000	2,575,000
Weighted-average common shares outstanding for diluted EPS (in shares)	252,405,000	251,024,000	251,976,000	250,665,000
Basic earnings per common share (in dollars per share)	$ 2.48	$ 1.00	$ 3.96	$ 3.95
Diluted earnings per common share (in dollars per share)	$ 2.46	$ 0.99	$ 3.93	$ 3.91
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from potential dilutive shares if performance goals fully met	2,273,102	2,001,020	2,406,512	2,047,656
Deferred Compensation Plan [Member] | RSUs [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Weighted-average common shares outstanding for basic EPS (in shares)	572,000	504,000	565,000	486,000
RSUs [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from earnings per share	0	0	2,426	0
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from earnings per share	0	0	0	0
RSAs [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from earnings per share	0	0	0	0