Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$ 93,200	$ 129,300	$ 22,300	$ 401,900
Other comprehensive income (loss):
Change in derivative instruments designated as cash flow hedges, net of tax	(1,200)	100	1,600	2,100
Foreign currency translation adjustments	8,000	14,900	(700)	(24,300)
Benefit plan adjustments, net of tax	2,200	1,800	6,600	5,200
Other comprehensive income (loss)	9,000	16,800	7,500	(17,000)
Comprehensive income	$ 102,200	$ 146,100	$ 29,800	$ 384,900