Share-Based Compensation Plans (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total cost of share-based compensation plans	$ 13,600,000	$ 11,300,000	$ 27,500,000	$ 25,400,000
Amounts capitalized in inventory and fixed assets	(400,000)	(200,000)	(800,000)	(600,000)
Amounts recognized in income for amounts previously capitalized in inventory and fixed assets	400,000	400,000	800,000	800,000
Amounts charged against income	$ 13,600,000	$ 11,500,000	$ 27,500,000	$ 25,600,000