Components of Equity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			$ 2,032,570	$ 2,010,069
Exercise of stock options			28,115	21,610
Issuance of shares under stock purchase plan			23,977	23,391
Shares repurchased under provisions of stock repurchase plans			(125,206)	(193,493)
Stock compensation expense			33,060	32,846
Tax benefits from stock plans, net			1,280	4,000
Net earnings	92,729	88,727	266,002	249,470
Other comprehensive (loss) income	8,751	9,632	(12,275)	8,341
Dividends paid			(61,899)	(59,358)
Purchase of noncontrolling interest			(3,733)
Distributions to noncontrolling interest			(1,161)	(1,177)
Ending Balance	2,180,730	2,095,699	2,180,730	2,095,699
Shareholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			2,027,699	2,003,638
Exercise of stock options			28,115	21,610
Issuance of shares under stock purchase plan			23,977	23,391
Shares repurchased under provisions of stock repurchase plans			(125,206)	(193,493)
Stock compensation expense			33,060	32,846
Tax benefits from stock plans, net			1,280	4,000
Net earnings			265,030	249,152
Other comprehensive (loss) income			(11,970)	8,231
Dividends paid			(61,899)	(59,358)
Purchase of noncontrolling interest			(507)
Ending Balance	2,179,579	2,090,017	2,179,579	2,090,017
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			4,871	6,431
Net earnings			972	318
Other comprehensive (loss) income			(305)	110
Purchase of noncontrolling interest			(3,226)
Distributions to noncontrolling interest			(1,161)	(1,177)
Ending Balance	$ 1,151	$ 5,682	$ 1,151	$ 5,682