BASIS OF PRESENTATION Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Cumulative effect of adoption of accounting standards updates								$ 189
Comprehensive income	$ 918	$ 844	$ 1,830	$ 1,512
Cash and cash equivalents	5,256		5,256			$ 2,624
Restricted cash included in prepaid expenses and other current assets	20		20			21
Total cash, cash equivalents and restricted cash as shown in the Unaudited Consolidated Statements of Cash Flows	5,276	$ 3,208	5,276	3,208		2,645		2,563
Operating lease assets	639		639			0
Total operating lease liabilities	649		649
Current operating lease liabilities	154		154
Non-current operating lease liabilities	$ 495		$ 495			$ 0
Retained Earnings
Cumulative effect of adoption of accounting standards updates								430
Accumulated Other Comprehensive Income (Loss)
Cumulative effect of adoption of accounting standards updates								$ (241)
Previously Reported [Member]
Comprehensive income				$ 1,300
Accounting Standards Update 2016-01 | Retained Earnings
Cumulative effect of adoption of accounting standards updates							$ 241
Accounting Standards Update 2016-02
Operating lease assets					$ 646
Total operating lease liabilities					646
Current operating lease liabilities					$ 152