FINANCIAL INSTRUMENTS - Summary of Fair Values of Derivative Instruments Using Level 2 Inputs (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative, Collateral, Right to Reclaim Cash	$ 6	$ 1
Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	341	270
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(162)	(130)
Derivative Asset	179	140
Derivative Liability, Fair Value, Gross Liability	577	378
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(164)	(130)
Derivative Liability	413	248
Fair Value, Inputs, Level 2 [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	122	142
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(68)	(64)
Derivative Asset	54	78
Derivative Liability, Fair Value, Gross Liability	361	288
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(72)	(64)
Derivative Liability	289	224
Fair Value, Inputs, Level 2 [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other current assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	63	90
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(57)	(47)
Derivative Asset	6	43
Fair Value, Inputs, Level 2 [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accrued and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	129	55
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(57)	(47)
Derivative Liability	72	8
Fair Value, Inputs, Level 2 [Member] | Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other current assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	24	42
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(6)	(14)
Derivative Asset	18	28
Fair Value, Inputs, Level 2 [Member] | Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Deferred charges and other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	35	10
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(5)	(3)
Derivative Asset	30	7
Fair Value, Inputs, Level 2 [Member] | Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Accrued and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	71	32
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(9)	(14)
Derivative Liability	62	18
Fair Value, Inputs, Level 2 [Member] | Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other Noncurrent Obligations [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	157	196
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(6)	(3)
Derivative Liability	151	193
Fair Value, Inputs, Level 2 [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Accrued and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	2	3
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	0	0
Derivative Liability	2	3
Fair Value, Inputs, Level 2 [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Other Noncurrent Obligations [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	2	2
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	0	0
Derivative Liability	2	2
Fair Value, Inputs, Level 2 [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	219	128
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(94)	(66)
Derivative Asset	125	62
Derivative Liability, Fair Value, Gross Liability	216	90
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(92)	(66)
Derivative Liability	124	24
Fair Value, Inputs, Level 2 [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accounts and Notes Receivable Other [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	138	103
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(89)	(62)
Derivative Asset	49	41
Fair Value, Inputs, Level 2 [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accounts Payable Other [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	148	84
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(88)	(62)
Derivative Liability	60	22
Fair Value, Inputs, Level 2 [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other current assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	70	13
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(3)	(2)
Derivative Asset	67	11
Fair Value, Inputs, Level 2 [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Deferred charges and other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	11	12
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(2)	(2)
Derivative Asset	9	10
Fair Value, Inputs, Level 2 [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Accrued and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	66	4
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(2)	(2)
Derivative Liability	64	2
Fair Value, Inputs, Level 2 [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other Noncurrent Obligations [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	2	2
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(2)	(2)
Derivative Liability	$ 0	$ 0