GENERAL INFORMATION AND OTHER FINANCIAL DATA - EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Income from continuing operations, net of income tax	$ 653	$ 280	$ 1,570	$ 25
(Earnings) losses attributable to noncontrolling interests	(52)	(16)	(121)	10
Mandatory convertible preferred stock dividends	(36)	(36)	(107)	(89)
Preferred dividends of subsidiary	0	0	1	1
Earnings (losses) from continuing operations attributable to common shares for basic EPS	565	228	1,341	(55)
Earnings (losses) from continuing operations attributable to common shares for diluted EPS	591	228	1,341	(55)
Income from discontinued operations, net of income tax	256	54	292	137
Earnings attributable to noncontrolling interests	(8)	(8)	(25)	(22)
Earnings from discontinued operations attributable to common shares	248	46	267	115
Earnings attributable to common shares for basic EPS	813	274	1,608	60
Add back dividends for dilutive mandatory convertible preferred stock	26	0	0	0
Earnings attributable to common shares	$ 839	$ 274	$ 1,608	$ 60
Weighted-average common shares outstanding for basic EPS	277,360,000	273,944,000	275,684,000	265,963,000
Dilutive effect of stock options, RSAs and RSUs (in shares)	1,636,000	854,000	1,381,000	0
Dilutive effect of common stock forward shares (in shares)	3,555,000	1,109,000	2,744,000	0
Dilutive effect of mandatory convertible preferred stock (in shares)	13,238,000	0	0	0
Weighted-average common shares outstanding for diluted EPS (in shares)	295,789,000	275,907,000	279,809,000	265,963,000
Earnings (losses) from continuing operations attributable to common shares (in usd per share)	$ 2.04	$ 0.83	$ 4.86	$ (0.21)
Earnings from discontinued operations attributable to common shares (in usd per share)	0.89	0.17	0.97	0.44
Earnings attributable to common shares (in usd per share)	2.93	1.00	5.83	0.23
Earnings (losses) from continuing operations attributable to common shares (in usd per share)	2.00	0.82	4.79	(0.21)
Earnings from discontinued operations attributable to common shares (in usd per share)	0.84	0.17	0.95	0.44
Earnings from continuing operations attributable to common shares (n usd per share)	$ 2.84	$ 0.99	$ 5.74	$ 0.23
Vested RSUs included in basic WASO (in shares)	618,000	645,000	615,000	638,000
Non-qualified stock options granted (in shares)			261,075
Convertible Preferred Stock [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Antidilutive securities excluded from earnings per share (in shares)	4,219,350	19,152,109	17,457,000	15,863,530
Common Stock Forward Sales [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Antidilutive securities excluded from earnings per share (in shares)	0	0	0	2,857,143
Share-based Payment Arrangement, Option [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Exercisable period			3 years
Performance-based RSUs [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Equity awards, granted (in shares)			389,825
Service-based RSUs [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Equity awards, granted (in shares)			260,594
Stock Options and RSUs [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Antidilutive securities excluded from earnings per share (in shares)				736,000
Common Stock [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Antidilutive securities excluded from earnings per share (in shares)				945,000
Stock options, RSAs and RSUs [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Antidilutive securities excluded from earnings per share (in shares)	0	508	107,042	1,552