Components of Equity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			$ 2,086,331	$ 2,032,570
Exercise of stock options			34,669	28,115
Issuance of shares under stock purchase plan			23,800	23,977
Shares repurchased under provisions of stock repurchase plans			(475,160)	(125,206)
Stock compensation expense			32,220	33,060
Tax benefits from stock plans, net			1,031	1,280
Net earnings	102,797	92,729	278,720	266,002
Other comprehensive (loss) income	(18,351)	8,751	(15,632)	(12,275)
Dividends paid			(62,807)	(61,899)
Purchase of noncontrolling interest			843	(3,733)
Distributions to noncontrolling interest			(85)	(1,161)
Ending Balance	1,903,930	2,180,730	1,903,930	2,180,730
Shareholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			2,084,783	2,027,699
Exercise of stock options			34,669	28,115
Issuance of shares under stock purchase plan			23,800	23,977
Shares repurchased under provisions of stock repurchase plans			(475,160)	(125,206)
Stock compensation expense			32,220	33,060
Tax benefits from stock plans, net			1,031	1,280
Net earnings			277,507	265,030
Other comprehensive (loss) income			(15,513)	(11,970)
Dividends paid			(62,807)	(61,899)
Purchase of noncontrolling interest			843	(507)
Ending Balance	1,901,373	2,179,579	1,901,373	2,179,579
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			1,548	4,871
Net earnings			1,213	972
Other comprehensive (loss) income			(119)	(305)
Purchase of noncontrolling interest			0	(3,226)
Distributions to noncontrolling interest			(85)	(1,161)
Ending Balance	$ 2,557	$ 1,151	$ 2,557	$ 1,151