SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Schedule of Estimated Quantities of Oil and Natural Gas Reserves) (Details) bbl in Millions, Boe in Millions, ft³ in Billions	12 Months Ended
	Dec. 31, 2016 Boe $ / bbl $ / Mcf ft³ bbl	Dec. 31, 2015 ft³ bbl
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Balance at beginning of year (Energy) | Boe	252
Extensions and discoveries (Energy) | Boe	0
Acquisitions of reserves in-place (Energy) | Boe	0
Revisions of previous estimates (Energy) | Boe	1
Sales of reserves in-place (Energy) | Boe	187
Production (Energy) | Boe	48
Balance at end of year (Energy) | Boe	18
Proved developed reserves (Energy) | Boe	18
Proved undeveloped reserves (Energy) | Boe	0
Deepwater Gulf of Mexico, Onshore California and Haynesville Oil And Gas Properties [Member]
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Sales of reserves in-place (Energy) | Boe	187
Natural Gas Liquids [Member]
Proved reserves:
Balance at beginning of year	1
Balance at end of year	1
Oil [Member]
Proved reserves:
Balance at beginning of year	4	207
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions	0
Proved Developed and Undeveloped Reserves, Purchases of Minerals in Place	0
Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates	1
Sale of reserves in-place	(168)
Production	(36)
Balance at end of year	4	207
Proved developed reserves	4
Proved undeveloped reserves	0
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Realized Sales Prices Used in Reserve Reports | $ / bbl	34.26
Natural Gas [Member]
Proved reserves:
Balance at beginning of year | ft³	87	274
Proved Developed and Undeveloped Reserves, Extensions, Discoveries, and Additions | ft³	0
Proved Developed and Undeveloped Reserves, Purchases of Minerals in Place | ft³	0
Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates | ft³	0
Sale of reserves in-place | ft³	(118)
Production | ft³	(69)
Balance at end of year | ft³	87	274
Proved developed reserves | ft³	87
Proved undeveloped reserves | ft³	0
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Realized Sales Prices Used in Reserve Reports | $ / Mcf	2.40