INVESTMENTS AND RELATED-PARTY TRANSACTIONS (Details) (USD $)	1 Months Ended	12 Months Ended
	Oct. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
EQUITY INVESTMENTS
Pre-tax gain on sale of equity investment		$ 1,175,000,000
RELATED-PARTY TRANSACTIONS
Sales to related parties		663,000,000	419,000,000	392,000,000
Purchases from related parties			8,000,000	10,000,000
Services to related parties		30,000,000	17,000,000	10,000,000
Advances and amounts due from related parties		67,000,000	25,000,000	32,000,000
Amounts due to related parties		3,000,000	129,000,000	21,000,000
Equity Method Investments
Equity method investment amounts		1,500,000,000	1,900,000,000
Equity investments dividends paid		447,000,000	526,000,000	349,000,000
Cumulative undistributed earnings of equity-method investees		65,000,000
Excess of investments in equity investees over the underlying equity in net assets		900,000,000
Excess of investments in equity investees over the underlying equity in net assets, which represents goodwill		750,000,000
Equity-method investments financial information summarized by Income Statement line item
Revenues		3,373,000,000	2,667,000,000	2,439,000,000
Costs and expenses		2,987,000,000	2,310,000,000	2,046,000,000
Net income		386,000,000	357,000,000	393,000,000
Equity-method investments financial information summarized by Balance Sheet line item
Current assets		1,813,000,000	2,242,000,000
Non-current assets		4,412,000,000	5,449,000,000
Current liabilities		1,308,000,000	1,799,000,000
Long-term debt		2,506,000,000	2,833,000,000
Other non-current liabilities		163,000,000	248,000,000
Stockholders' equity		2,248,000,000	2,811,000,000
General Partner of Plains All American Pipeline,L.P
EQUITY INVESTMENTS
Ownership interest (as a percent)		25.00%
Proceed from sale of investment	1,400,000,000
Pre-tax gain on sale of equity investment	$ 1,000,000,000
RELATED-PARTY TRANSACTIONS
Sales to related party (as a percent)		72.00%	80.00%	76.00%
Dolphin Energy
EQUITY INVESTMENTS
Equity method investment ownership percentage		24.50%
Ownership interest (as a percent)		24.50%
Number of separate economic interests comprising investment in unconsolidated affiliate		2