Components of Equity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			$ 2,086,331	$ 2,032,570
Exercise of stock options			30,017	18,477
Shares repurchased under provisions of stock repurchase plans			(358,116)	(39,281)
Stock compensation expense			22,171	22,045
Tax benefits from stock plans, net			984	1,516
Net earnings	91,728	92,663	175,923	173,273
Other comprehensive income (loss)	5,096	(11,013)	2,719	(21,026)
Dividends paid			(62,807)	(61,899)
Distributions to noncontrolling interest			(85)
Purchase of noncontrolling interest				(3,733)
Ending Balance	1,897,137	2,121,942	1,897,137	2,121,942
Shareholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			2,084,783	2,027,699
Exercise of stock options			30,017	18,477
Shares repurchased under provisions of stock repurchase plans			(358,116)	(39,281)
Stock compensation expense			22,171	22,045
Tax benefits from stock plans, net			984	1,516
Net earnings			175,126	172,630
Other comprehensive income (loss)			2,656	(20,839)
Dividends paid			(62,807)	(61,899)
Purchase of noncontrolling interest				(507)
Ending Balance	1,894,814	2,119,841	1,894,814	2,119,841
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			1,548	4,871
Net earnings			797	643
Other comprehensive income (loss)			63	(187)
Distributions to noncontrolling interest			(85)
Purchase of noncontrolling interest				(3,226)
Ending Balance	$ 2,323	$ 2,101	$ 2,323	$ 2,101