STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - Treasury Stock (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Apr. 01, 2019
Statement of Stockholders' Equity [Abstract]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 2,700
Stock Repurchase Program, Authorized Amount			$ 3,000
Payments for Repurchase of Common Stock	$ 305	$ 0

The cash outflow to reacquire common stock during the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

Name:	us-gaap_PaymentsForRepurchaseOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration