FINANCIAL INSTRUMENTS (Unrealized gains losses) (Details) (Commodity Contract [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Embedded derivatives in provisional sales contracts [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Atlantic Copper [Member] | Amounts recorded in Sales [Member]
Realized gains (losses):
Realized and unrealized gains (losses)	$ (136)	[1]	$ 77	[1]	$ (519)	[1]
Crude Oil Options [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Plains Exploration & Production Company [Member] | Amounts recorded in Sales [Member]
Realized gains (losses):
Realized and unrealized gains (losses)	(344)	[1]	0	[1]	0	[1]
Natural Gas Swaps [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Plains Exploration & Production Company [Member] | Amounts recorded in Sales [Member]
Realized gains (losses):
Realized and unrealized gains (losses)	10	[1]	0	[1]	0	[1]
Copper Forward Contracts [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Atlantic Copper [Member] | Amounts recorded in Cost of Sales [Member]
Realized gains (losses):
Realized and unrealized gains (losses)	3	[2]	15	[2]	(2)	[2]
Fair Value Hedging [Member] | Amounts recorded in Sales [Member]
Unrealized gains (losses):
Derivative financial instruments	1		15		(28)
Hedged item	(1)		(15)		28
Realized gains (losses):
Matured derivative financial instruments	$ (17)		$ (2)		$ (28)

[1] Amounts recorded in revenues.

[2] Amounts recorded in cost of sales as production and delivery costs.