LONG-TERM DEBT (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended																					12 Months Ended																	1 Months Ended
	Mar. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Dolphin Energy	Dec. 31, 2012 Dolphin Energy	Dec. 31, 2013 4.10% senior notes due 2021	Dec. 31, 2012 4.10% senior notes due 2021	Dec. 31, 2013 1.75% senior notes due 2017	Dec. 31, 2012 1.75% senior notes due 2017	Aug. 31, 2011 1.75% senior notes due 2017	Dec. 31, 2013 2.70% senior notes due 2023	Dec. 31, 2012 2.70% senior notes due 2023	Jun. 30, 2012 2.70% senior notes due 2023	Mar. 31, 2011 7.0% senior notes due 2013	Dec. 31, 2013 3.125% senior notes due 2022	Dec. 31, 2012 3.125% senior notes due 2022	Aug. 31, 2011 3.125% senior notes due 2022	Dec. 31, 2013 4.125% senior notes due 2016	Dec. 31, 2012 4.125% senior notes due 2016	Dec. 31, 2013 2.5% senior notes due 2016	Dec. 31, 2012 2.5% senior notes due 2016	Dec. 31, 2013 1.45% senior notes due 2013	Dec. 31, 2012 1.45% senior notes due 2013	Dec. 31, 2013 1.50% senior notes due 2018	Dec. 31, 2012 1.50% senior notes due 2018	Jun. 30, 2012 1.50% senior notes due 2018	Mar. 31, 2011 6.75% senior notes due 2012	Dec. 31, 2013 8.45% senior notes due 2029	Dec. 31, 2012 8.45% senior notes due 2029	Dec. 31, 2013 9.25% senior debentures due 2019	Dec. 31, 2012 9.25% senior debentures due 2019	Dec. 31, 2013 7.2% senior debentures due 2028	Dec. 31, 2012 7.2% senior debentures due 2028	Dec. 31, 2013 Variable rate bonds due 2030 (0.04% and 0.13% as of December 31, 2013 and 2012, respectively)	Dec. 31, 2012 Variable rate bonds due 2030 (0.04% and 0.13% as of December 31, 2013 and 2012, respectively)	Dec. 31, 2013 8.75% medium-term notes due 2023	Dec. 31, 2012 8.75% medium-term notes due 2023	Dec. 31, 2013 Senior notes due in 2021 and later	Aug. 31, 2011 1.75% senior notes due 2017, 3.125% senior notes due 2022	Jun. 30, 2012 2.70% senior notes due 2023, 1.50% senior notes due 2018
Debt instrument
Variable interest rate (as a percent)																																			0.04%	0.13%
Long-term debt, gross		$ 6,964	$ 7,654				$ 1,249	$ 1,300	$ 1,250	$ 1,250		$ 1,224	$ 1,250			$ 887	$ 900		$ 750	$ 750	$ 700	$ 700		$ 600	$ 500	$ 500			$ 116	$ 116	$ 116	$ 116	$ 82	$ 82	$ 68	$ 68	$ 22	$ 22
Unamortized discount, net		(25)	(31)
Current maturities			(600)
Total long-term debt		6,939	7,023
Debt instrument interest rate stated percentage							4.10%	4.10%	1.75%	1.75%		2.70%	2.70%			3.125%	3.125%		4.125%	4.125%	2.50%	2.50%	1.45%	1.45%	1.50%	1.50%			8.45%	8.45%	9.25%	9.25%	7.20%	7.20%			8.75%	8.75%
Notes repurchased																																							90
Long term debt matured		690		1,523																			600
Debt instrument issued											1,250			1,250				900									500													2,150	1,750
Net proceeds from issuance of long-term debt			1,736	2,111																																				2,100	1,740
Face amount of notes redeemed															1,000													368
Pre-tax charge related to this redemption of notes	163
Notional amount of limited recourse guarantees with respect to Dolphin Energy's debt					$ 354	$ 370