Condensed Consolidated Statements of Comprehensive (Loss) Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net (loss) income	$ (161,600)	$ 133,900	$ (70,900)	$ 272,600
Other comprehensive income (loss):
Change in derivative instruments designated as cash flow hedges, net of tax	(400)	(300)	2,800	2,000
Foreign currency translation adjustments	(6,600)	(43,900)	(8,700)	(39,200)
Benefit plan adjustments, net of tax	2,200	1,700	4,400	3,400
Other comprehensive income (loss)	(4,800)	(42,500)	(1,500)	(33,800)
Comprehensive (loss) income	$ (166,400)	$ 91,400	$ (72,400)	$ 238,800