Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss)		$ (10,282,000)	$ (438,890,000)	$ (24,061,000)
Accumulated Other Comprehensive Income (Loss)		(33,338,000)	(23,056,000)
Significant amounts reclassified out of AOCI				0
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), before Tax			(20,021,000)	417,707,000
Other Comprehensive Loss, before Reclassifications, before Tax		(11,517,000)	(54,484,000)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	0	(383,244,000)
Tax Effects		0	0
Other Comprehensive Income (Loss)		(11,517,000)	(437,728,000)
Accumulated Other Comprehensive Income (Loss)		(31,538,000)
Other [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), before Tax			(3,035,000)	(1,873,000)
Other Comprehensive Loss, before Reclassifications, before Tax		(129,000)	(918,000)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[2]	1,572,000	246,000
Tax Effects		(208,000)	(490,000)
Other Comprehensive Income (Loss)		1,235,000	(1,162,000)
Accumulated Other Comprehensive Income (Loss)		(1,800,000)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), before Tax			(23,056,000)	415,834,000
Other Comprehensive Loss, before Reclassifications, before Tax		(11,646,000)	(55,402,000)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		1,572,000	(382,998,000)
Tax Effects		(208,000)	(490,000)
Other Comprehensive Income (Loss)		(10,282,000)	$ (438,890,000)	$ (24,061,000)
Accumulated Other Comprehensive Income (Loss)		$ (33,338,000)

[1] Reclassified to Net Income (Loss) - Gains (Losses) on Asset Dispositions, Net. See Note 17.

[2] Related to certain EOG pension plans. See Note 7.