COMMITMENTS AND CONTINGENCIES 4 (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2006	Dec. 31, 2002
Asbestos Related Liabilities [Member]
Exceptions To Cap [Abstract]
Loss Contingency, Receivable	$ 469	$ 477
Bendix Asbestos Loss Contingency Liability [Member]
Exceptions To Cap [Abstract]
Loss Contingency, Receivable	168	170
Narco Asbestos Loss Contingency Liability [Member]
Loss Contingency By Nature Of Contingency [Line Items]
Change in NARCO Trust liability.			$ (207)
Settlement Payments	2,000
Estimated Liability	897			$ 3,200
Annual Trust Cap	145
Exceptions To Cap [Abstract]
Value Not Included In Cap	100
Loss Contingency, Receivable	301	$ 307
Narco Asbestos Loss Contingency Liability [Member] | Maximum [Member]
Loss Contingency By Nature Of Contingency [Line Items]
Estimated Liability			961
Pre-bankruptcy NARCO Liability [Member]
Loss Contingency By Nature Of Contingency [Line Items]
Estimated Liability	154			2,200
NARCO Trust Liability [Member]
Loss Contingency By Nature Of Contingency [Line Items]
Estimated Liability	$ 743			950
NARCO Trust Liability [Member] | Minimum [Member]
Loss Contingency By Nature Of Contingency [Line Items]
Estimated Liability			$ 743
Other NARCO bankruptcy-related obligations [Member]
Loss Contingency By Nature Of Contingency [Line Items]
Estimated Liability				$ 73