INCOME TAXES - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Contingency [Line Items]
Tax benefits from share-based compensation	$ 72	$ 32	$ 34
Change in unrecognized tax benefits	70	397	14
Unrecognized tax benefits that, if recognized, would impact the effective tax rate	385	288	15
Amount of unrecognized tax benefits that is reasonably possible will be reversed in next twelve months	83
Interest related to unrecognized tax benefits	24	8	3
Tax credits which expire	12
Tax credits which do not expire	15
Net operating loss benefits	6	5
Net operating losses	2,250
Net operating losses subject to expiration	1,346
Cash paid for income taxes	$ 636	$ 293	$ 218
Income tax benefit from non-U.S. income	(7.80%)	(6.80%)	(5.20%)
Non-U.S. pre tax income	$ 853	$ 371	$ 359
2017 Tax Act, income tax provision due to one-time transition tax	586
2017 Tax Act, estimated tax benefit for deferred tax assets and liabilities	159
2017 Tax Act, provisional estimated foreign and state transition tax expense	745
U.S. Issues Currently in Appeals
Income Tax Contingency [Line Items]
Amount of unrecognized tax benefits that is reasonably possible will be reversed in next twelve months	59
State and Non-U.S. Audits Expected to be Resolved in 2018
Income Tax Contingency [Line Items]
Amount of unrecognized tax benefits that is reasonably possible will be reversed in next twelve months	20
Issues for Which Statues of Limitations Expired in 2018
Income Tax Contingency [Line Items]
Amount of unrecognized tax benefits that is reasonably possible will be reversed in next twelve months	$ 3
Switzerland, Singapore, and Luxembourg
Income Tax Contingency [Line Items]
Income tax benefit from non-U.S. income	(6.20%)	(7.40%)	(4.80%)
Non-U.S. pre tax income	$ 576	$ 271	$ 182