Accumulated Other Comprehensive Loss (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Balance -				$ (220,295,000)				$ (223,094,000)	$ (220,295,000)	$ (223,094,000)
Other comprehensive (loss) income before reclassifications									(171,999,000)	(12,637,000)
Amounts reclassified from AOCL									13,153,000	15,436,000
Net current-period other comprehensive (loss) income									(158,846,000)	2,799,000	(8,318,000)
Balance -	(379,141,000)				(220,295,000)				(379,141,000)	(220,295,000)	(223,094,000)
Net earnings from affiliates									12,115,000	39,017,000	16,952,000
Tax (expense) benefit									(208,305,000)	(204,701,000)	(160,766,000)
Net of tax	159,000,000	128,600,000	123,500,000	107,700,000	141,100,000	126,300,000	120,400,000	97,800,000	518,824,000	485,530,000	448,339,000
Other income (expense), net									(60,322,000)	(54,413,000)	(43,520,000)
Losses expected to be recognized in next twelve months, net	3,800,000								3,800,000
Foreign currency translation items
Balance -				(89,953,000)				(61,083,000)	(89,953,000)	(61,083,000)
Other comprehensive (loss) income before reclassifications									(150,357,000)	(30,087,000)
Amounts reclassified from AOCL									1,777,000	1,217,000
Net current-period other comprehensive (loss) income									(148,580,000)	(28,870,000)
Balance -	(238,533,000)				(89,953,000)				(238,533,000)	(89,953,000)
Foreign currency translation items | Reclassification out of Accumulated Other Comprehensive Income
Net earnings from affiliates									0	(1,217,000)
Release of cumulative translation adjustments due to sale of business									(1,777,000)	0
Tax (expense) benefit									0	0
Net of tax									(1,777,000)	(1,217,000)
Pension and other post-retirement effects
Balance -				(129,528,000)				(161,757,000)	(129,528,000)	(161,757,000)
Other comprehensive (loss) income before reclassifications									(16,300,000)	18,951,000
Amounts reclassified from AOCL									10,430,000	13,278,000
Net current-period other comprehensive (loss) income									(5,870,000)	32,229,000
Balance -	(135,398,000)				(129,528,000)				(135,398,000)	(129,528,000)
Pension and other post-retirement effects | Reclassification out of Accumulated Other Comprehensive Income
Tax (expense) benefit									4,528,000	6,391,000
Net of tax									(10,430,000)	(13,278,000)
Pension and other postretirement effects									(13,976,000)	(19,669,000)
Amortization of actuarial losses									668,000	0
Settlement									(314,000)	0
Cash flow hedging activity
Balance -				(814,000)				(254,000)	(814,000)	(254,000)
Other comprehensive (loss) income before reclassifications									(5,342,000)	(1,501,000)
Amounts reclassified from AOCL									946,000	941,000
Net current-period other comprehensive (loss) income									(4,396,000)	(560,000)
Balance -	(5,210,000)				(814,000)				(5,210,000)	(814,000)
Cash flow hedging activity | Reclassification out of Accumulated Other Comprehensive Income
Tax (expense) benefit									588,000	565,000
Net of tax									(946,000)	(941,000)
Other income (expense), net									(1,534,000)	(1,506,000)
Noncontrolling Interests
Net current-period other comprehensive (loss) income									83,000	(34,000)	(105,000)
Foreign currency translation adjustments, attributable to noncontrolling interest	$ 1,300,000				$ 1,200,000				$ 1,300,000	$ 1,200,000	$ 1,200,000