Segment Revenues and Segment Income (Parenthetical) (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Expense for incentive compensation plans		$ 108,100,000	$ 75,300,000	$ 106,700,000
Litigation Charge	137,800,000
Share-based compensation expense		63,277,000	53,476,000	67,138,000
Corporate and Other
Segment Reporting Information [Line Items]
Expense for incentive compensation plans		108,100,000	75,300,000	106,700,000
Litigation Charge		137,800,000
Severance expenses		13,400,000	14,900,000	21,000,000
Share-based compensation expense		63,300,000	53,500,000	67,100,000
Benefit from insurance recovery of cost incurred in connection with product liability-related litigation				4,800,000
Reduction of reserve for the settlement of product liability-related litigation				8,700,000
Legal settlement			$ 7,500,000