CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) [Abstract]
Net income (loss)	$ (2,270,833)		$ 905,611		$ 1,123,473
Other comprehensive loss, net of tax
Net loss from foreign currency translation	(546,705)		(271,491)		(308,300)
Retirement and postretirement benefit plans	10,492		(72,796)		69,583
Deferred loss on interest rate hedges reclassified to interest expense	1,926		1,913		1,935
Other comprehensive loss	(534,287)	[1]	(342,374)	[1]	(236,782)
Comprehensive income (loss)	$ (2,805,120)		$ 563,237		$ 886,691

[1] All amounts are presented net of income taxes.