Accelerated Share Repurchase Activity and Related Information (Parenthetical) (Detail) (August 2014 ASR) In Thousands, unless otherwise specified	1 Months Ended		3 Months Ended	7 Months Ended
	Feb. 28, 2015	Aug. 31, 2014	Dec. 27, 2014	Feb. 28, 2015
August 2014 ASR
Accelerated Share Repurchases [Line Items]
Number of shares repurchased and retired	13,300	59,900	8,300	81,525	[1]

[1] Includes 59.9 million shares delivered and retired at the beginning of the purchase period, which began in the fourth quarter of 2014, 8.3 million net shares delivered and retired in the first quarter of 2015 and 13.3 million shares delivered and retired at the end of the purchase period, which concluded in the second quarter of 2015.