Fair Value Measurement (Unaudited) (Details) (USD $) In Millions, unless otherwise specified																																																																																																																																																																																																																																																																																																																	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Crude Oil Options [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Crude Oil Options [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Crude Oil Options [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Crude Oil Options [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Crude Oil Options [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper forward contracts [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper forward contracts [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper forward contracts [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper forward contracts [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper forward contracts [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Plains Offshore Warrants [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Plains Offshore Warrants [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Plains Offshore Warrants [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Plains Offshore Warrants [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Plains Offshore Warrants [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Money market funds [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Money market funds [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Money market funds [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Money market funds [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Money market funds [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Money market funds [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Money market funds [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Money market funds [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Money market funds [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Money market funds [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] U.S. core fixed income fund [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] U.S. core fixed income fund [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] U.S. core fixed income fund [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] U.S. core fixed income fund [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] U.S. core fixed income fund [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] U.S. core fixed income fund [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] U.S. core fixed income fund [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] U.S. core fixed income fund [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] U.S. core fixed income fund [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] U.S. core fixed income fund [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Equity securities [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Equity securities [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Equity securities [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Equity securities [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Equity securities [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Equity securities [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Equity securities [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Equity securities [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Equity securities [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Equity securities [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Government mortgage-backed securities [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Government mortgage-backed securities [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Government mortgage-backed securities [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Government mortgage-backed securities [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Government mortgage-backed securities [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Government mortgage-backed securities [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Government mortgage-backed securities [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Government mortgage-backed securities [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Government mortgage-backed securities [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Government mortgage-backed securities [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Corporate bonds [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Corporate bonds [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Corporate bonds [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Corporate bonds [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Corporate bonds [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Corporate bonds [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Corporate bonds [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Corporate bonds [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Corporate bonds [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Corporate bonds [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Government bonds and notes [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Government bonds and notes [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Government bonds and notes [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Government bonds and notes [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Government bonds and notes [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Government bonds and notes [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Government bonds and notes [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Government bonds and notes [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Government bonds and notes [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Government bonds and notes [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Asset-backed securities [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Asset-backed securities [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Asset-backed securities [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Asset-backed securities [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Asset-backed securities [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Asset-backed securities [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Asset-backed securities [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Asset-backed securities [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Asset-backed securities [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Asset-backed securities [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Municipal bonds [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Municipal bonds [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Municipal bonds [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Municipal bonds [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Municipal bonds [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Municipal bonds [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Municipal bonds [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Municipal bonds [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Municipal bonds [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Municipal bonds [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Embedded derivatives in provisional sales/purchases contracts [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Crude oil and natural gas swaps [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Crude oil and natural gas swaps [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Crude oil and natural gas swaps [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Crude oil and natural gas swaps [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Crude oil and natural gas swaps [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Estimate of Fair Value Measurement [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Fair Value, Inputs, Level 1 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Fair Value, Inputs, Level 2 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Copper futures and swap contracts [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Fair Value, Measurements, Recurring [Member] Time Deposits [Member] Carrying Amount, Fair Value Disclosure [Member]		Sep. 30, 2013 McMoRan Exploration Co [Member]	Dec. 31, 2012 McMoRan Exploration Co [Member] Fair Value, Measurements, Recurring [Member] Cost-method investments [Member] Carrying Amount, Fair Value Disclosure [Member]		Dec. 31, 2012 McMoRan Exploration Co [Member] Fair Value, Measurements, Recurring [Member] Cost-method investments [Member] Estimate of Fair Value Measurement [Member]		Dec. 31, 2012 McMoRan Exploration Co [Member] Fair Value, Measurements, Recurring [Member] Cost-method investments [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 McMoRan Exploration Co [Member] Fair Value, Measurements, Recurring [Member] Cost-method investments [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 McMoRan Exploration Co [Member] Fair Value, Measurements, Recurring [Member] Cost-method investments [Member] Fair Value, Inputs, Level 3 [Member]		Sep. 30, 2013 Deferred Option Premiums and Accrued Interest [Member]
Investment securities (current and long-term):
Investment securities			$ 107	[1],[2],[3]	$ 492		$ 107	[1],[2],[3]	$ 585		$ 86	[1],[2],[3]	$ 24		$ 21	[1],[2],[3]	$ 561		$ 0	[1],[2],[3]	$ 0																																																																								$ 82	[1],[2],[3]	$ 16	[1],[2]	$ 82	[1],[2],[3]	$ 16	[1],[2]	$ 82	[1],[2],[3]	$ 16	[1],[2]	$ 0	[1],[2],[3]	$ 0	[1],[2]	$ 0	[1],[2],[3]	$ 0	[1],[2]	$ 21	[1],[2],[3]	$ 22	[1],[2]	$ 21	[1],[2],[3]	$ 22	[1],[2]	$ 0	[1],[2],[3]	$ 0	[1],[2]	$ 21	[1],[2],[3]	$ 22	[1],[2]	$ 0	[1],[2],[3]	$ 0	[1],[2]	$ 4	[1],[2],[3]	$ 8	[1],[2]	$ 4	[1],[2],[3]	$ 8	[1],[2]	$ 4	[1],[2],[3]	$ 8	[1],[2]	$ 0	[1],[2],[3]	$ 0	[1],[2]	$ 0	[1],[2],[3]	$ 0	[1],[2]																																																																																																																																																							$ 30	[1],[4]		$ 446	[5]	$ 539	[5]	$ 0	[5]	$ 539	[5]	$ 0	[5]
Trust assets (long-term):
Trust assets			158	[1],[2]	163	[1],[2]	158	[1],[2]	163	[1],[2]	7	[1],[2]	7	[1],[2]	151	[1],[2]	156	[1],[2]	0	[1],[2]	0	[1],[2]																																																																							7	[1],[2]	7	[1],[2]	7	[1],[2]	7	[1],[2]	7	[1],[2]	7	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	0	[1],[2]	48	[1],[2]	50	[1],[2]	48	[1],[2]	50	[1],[2]	0	[1],[2]	0	[1],[2]	48	[1],[2]	50	[1],[2]	0	[1],[2]	0	[1],[2]																					37	[1],[2]	36	[1],[2]	37	[1],[2]	36	[1],[2]	0	[1],[2]	0	[1],[2]	37	[1],[2]	36	[1],[2]	0	[1],[2]	0	[1],[2]	26	[1],[2]	30	[1],[2]	26	[1],[2]	30	[1],[2]	0	[1],[2]	0	[1],[2]	26	[1],[2]	30	[1],[2]	0	[1],[2]	0	[1],[2]	24	[1],[2]	24	[1],[2]	24	[1],[2]	24	[1],[2]	0	[1],[2]	0	[1],[2]	24	[1],[2]	24	[1],[2]	0	[1],[2]	0	[1],[2]	15	[1],[2]	15	[1],[2]	15	[1],[2]	15	[1],[2]	0	[1],[2]	0	[1],[2]	15	[1],[2]	15	[1],[2]	0	[1],[2]	0	[1],[2]	1	[1],[2]	1	[1],[2]	1	[1],[2]	1	[1],[2]	0	[1],[2]	0	[1],[2]	1	[1],[2]	1	[1],[2]	0	[1],[2]	0	[1],[2]
Derivatives:
Derivative assets	53	33	78	[1],[4]	41	[1],[4]	78	[1],[4]	41	[1],[4]	3	[1],[4]	5	[1],[4]	75	[1],[4]	36	[1],[4]	0	[1],[4]	0	[1],[4]																																																																																																																																																																																																																																							51	[1],[4]	36	[1],[4]	51	[1],[4]	36	[1],[4]	0	[1],[4]	0	[1],[4]	51	[1],[4]	36	[1],[4]	0	[1],[4]	0	[1],[4]	24	[1],[4]	24	[1],[4]	0	[1],[4]	24	[1],[4]	0	[1],[4]	3	[1],[4]	5	[1],[4]	3	[1],[4]	5	[1],[4]	3	[1],[4]	5	[1],[4]	0	[1],[4]	0	[1],[4]	0	[1],[4]	0	[1],[4]
Total assets							343		789		96		36		247		753		0		0
Derivatives:
Derivative liabilities	208	20	244	[1]	28	[1],[4]	244	[1]	28	[1],[4]	2	[1]	1	[1],[4]	13	[1]	27	[1],[4]	229	[1]	0	[1],[4]	13	[1],[4]	27	[1],[4]	13	[1],[4]	27	[1],[4]	0	[1],[4]	0	[1],[4]	13	[1],[4]	27	[1],[4]	0	[1],[4]	0	[1],[4]	218	[1],[4]	218	[1],[4]	0	[1],[4]	0	[1],[4]	218	[1],[4]	1	[1],[4]	1	[1],[4]	1	[1],[4]	1	[1],[4]	1	[1],[4]	1	[1],[4]	0	[1],[4]	0	[1],[4]	0	[1],[4]	0	[1],[4]	1	[1],[4]	1	[1],[4]	1	[1],[4]	0	[1],[4]	0	[1],[4]	11	[1],[6]	11	[1],[6]	0	[1],[6]	0	[1],[6]	11	[1],[6]																																																																																																																																																																																																																																461
Long-term debt, including current portion			21,123	[7]	3,527	[7]	20,411	[7]	3,589	[7]	0	[7]	0	[7]	20,411	[7]	3,589	[7]	0	[7]	0	[7]
Total liabilities							$ 20,655		$ 3,617		$ 2		$ 1		$ 20,424		$ 3,616		$ 229		$ 0
Preferred Stock, Dividend Rate, Percentage																																																																																																																																																																																																																																																																																																																	5.80%

[1] Recorded at fair value.

[2] Current portion included in other current assets and long-term portion included in other assets.

[3] Investment securities excluded $30 million of time deposits at September 30, 2013.

[4] Crude oil options are net of $461 million for deferred premiums and accrued interest at September 30, 2013. Refer to Note 9 for further discussion and balance sheet classifications.

[5] Recorded at cost and included in other assets.

[6] Included in other liabilities. Refer to Note 2 for further discussion.

[7] Recorded at cost except for debt assumed in the PXP, MMR and Freeport-McMoRan Corporation acquisitions, which were recorded at fair value at the respective acquisition dates.