GENERAL INFORMATION AND OTHER FINANCIAL DATA - EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Jan. 31, 2020	Mar. 31, 2020	Mar. 31, 2019
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Income from continuing operations, net of income tax		$ 867	$ 560
Earnings attributable to noncontrolling interests		(143)	(32)
Mandatory convertible preferred stock dividends		(36)	(36)
Earnings from continuing operations attributable to common shares for basic EPS		688	492
Add back dividends for dilutive mandatory convertible preferred stock		36	0
Earnings from continuing operations attributable to common shares for diluted EPS		724	492
Income (loss) from discontinued operations, net of income tax		80	(42)
Earnings attributable to noncontrolling interests		(8)	(9)
Earnings (losses) from discontinued operations attributable to common shares		72	(51)
Earnings attributable to common shares for basic EPS		760	441
Earnings attributable to common shares		$ 796	$ 441
Weighted-average common shares outstanding for basic EPS		292,790,000	274,674,000
Dilutive effect of stock options, RSAs and RSUs (in shares)		1,304,000	969,000
Dilutive effect of common stock forward shares (in shares)		0	1,585,000
Dilutive effect of mandatory convertible preferred stock (in shares)		19,831,000	0
Weighted-average common shares outstanding for diluted EPS (in shares)		313,925,000	277,228,000
Earnings (losses) from continuing operations attributable to common shares (in usd per share)		$ 2.35	$ 1.79
Earnings from discontinued operations attributable to common shares (in usd per share)		0.25	(0.19)
Earnings attributable to common shares (in usd per share)		2.60	1.60
Earnings (losses) from continuing operations attributable to common shares (in usd per share)		2.30	1.78
Earnings from discontinued operations attributable to common shares (in usd per share)		0.23	(0.19)
Earnings from continuing operations attributable to common shares (n usd per share)		$ 2.53	$ 1.59
Vested RSUs included in basic WASO (in shares)		542,000	613,000
Non-qualified stock options granted (in shares)	154,860
Convertible Preferred Stock [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Antidilutive securities excluded from earnings per share (in shares)		0	18,601,085
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)	258,470
Service-based RSUs [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Equity awards, granted (in shares)	100,972
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)		254,257	316,385