Shareholders' Equity - Additional Information (Detail) - USD ($)	Mar. 31, 2017	Oct. 26, 2016	Oct. 28, 2015
2015 Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Repurchase program authorizing the purchase of shares			$ 1,000,000,000
Stock repurchase program, remaining authorized repurchase amount		$ 330,300,000
2016 Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Repurchase program authorizing the purchase of shares		$ 750,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 781,200,000