EQUITY - Changes in Shareholders's Equity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Changes in Shareholders' equity
Beginning balance		$ 15,231		$ 15,231
Net income (loss)	$ 522		$ 445	1,417	$ 1,447
Other comprehensive income	24		$ (312)	42	$ (716)
Cash dividends paid				(782)
Issuance of shares under equity-based compensation plans - net				105
Repurchase of shares				(567)
Ending balance	15,446			15,446
Parent [Member]
Changes in Shareholders' equity
Beginning balance		15,186		15,186
Net income (loss)				1,418
Other comprehensive income				42
Cash dividends paid				(780)
Issuance of shares under equity-based compensation plans - net				105
Repurchase of shares				(567)
Ending balance	15,404			15,404
Noncontrolling Interest [Member]
Changes in Shareholders' equity
Beginning balance		$ 45		45
Net income (loss)				(1)
Other comprehensive income				0
Cash dividends paid				(2)
Issuance of shares under equity-based compensation plans - net				0
Repurchase of shares				0
Ending balance	$ 42			$ 42
2013 Program [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of shares authorized to be repurchased (in shares)	40.0			40.0
Ordinary shares purchased (in shares)		1.5	4.8		7.2
Changes in Shareholders' equity
Repurchase of shares		$ (82)	$ (284)		$ (454)
2016 Program [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Ordinary shares purchased (in shares)	3.7			7.7
Amount of shares repurchased (up to)	$ 2,500			$ 2,500
Changes in Shareholders' equity
Repurchase of shares	$ (243)			$ (485)