Shareholders' Equity (Narrative) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
3 Months Ended | |||
|---|---|---|---|---|
Apr. 01, 2016 |
Apr. 03, 2015 |
Aug. 31, 2015 |
Aug. 31, 2014 |
|
| 2014 Stock Repurchase Program [Member] | ||||
| Equity, Class of Stock [Line Items] | ||||
| Stock repurchase program approved amount | $ 300.0 | |||
| Stock Repurchased During Period, Shares | 0.5 | |||
| Common Stock Acquired, Average Cost Per Share | $ 26.34 | |||
| Stock Repurchased During Period, Value | $ 12.6 | |||
| 2015 Stock Repurchase Program [Member] | ||||
| Equity, Class of Stock [Line Items] | ||||
| Stock repurchase program approved amount | $ 400.0 | |||
| Stock Repurchased During Period, Shares | 0.5 | |||
| Common Stock Acquired, Average Cost Per Share | $ 24.30 | |||
| Stock Repurchased During Period, Value | $ 12.2 | |||
| Stock Repurchase Program, Remaining Authorized Repurchase Amount | 237.7 | |||
| Retained Earnings [Member] | ||||
| Equity, Class of Stock [Line Items] | ||||
| Stock Repurchased During Period, Value | $ 9.7 | |||