Components of Equity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 2,032,570	$ 2,010,069
Exercise of stock options	10,929	12,920
Shares repurchased under provisions of stock repurchase plans	(17,681)	(21,865)
Stock compensation expense	11,005	10,600
Tax benefits from stock plans, net	934	3,426
Net earnings	80,610	76,722
Other comprehensive income (loss)	(10,013)	10,162
Purchase of noncontrolling interest	(3,733)
Ending Balance	2,104,621	2,102,034
Shareholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	2,027,699	2,003,638
Exercise of stock options	10,929	12,920
Shares repurchased under provisions of stock repurchase plans	(17,681)	(21,865)
Stock compensation expense	11,005	10,600
Tax benefits from stock plans, net	934	3,426
Net earnings	80,315	76,707
Other comprehensive income (loss)	(9,999)	10,028
Purchase of noncontrolling interest	(507)
Ending Balance	2,102,695	2,095,454
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	4,871	6,431
Net earnings	295	15
Other comprehensive income (loss)	(14)	134
Purchase of noncontrolling interest	(3,226)
Ending Balance	$ 1,926	$ 6,580