Stock Repurchase Program (Detail) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		287 Months Ended
	Dec. 14, 2021	Dec. 10, 2021	Nov. 20, 2021	Nov. 21, 2020	Nov. 20, 2021	Oct. 05, 2021
Equity, Class of Treasury Stock [Line Items]
Purchase of treasury stock, shares			514,534	584,000	150,800,000
Purchase of treasury stock			$ 899,997	$ 678,324	$ 26,600,000
Remaining value authorized for share repurchases			1,000,000		1,000,000
Stock Repurchase Program 1998
Equity, Class of Treasury Stock [Line Items]
Stock repurchase authorized			$ 27,700,000		$ 27,700,000
Common Stock
Equity, Class of Treasury Stock [Line Items]
Stock repurchase authorized						$ 1,500,000
Subsequent Events [Member]
Equity, Class of Treasury Stock [Line Items]
Purchase of treasury stock, shares		63,909
Purchase of treasury stock		$ 120,000
Increase in authorization of stock repurchase, value	$ 1,500,000
Stock repurchase authorized	$ 29,200,000
Remaining value authorized for share repurchases		$ 2,400,000