Components Of Equity - Additional Information (Detail) - $ / shares shares in Thousands			6 Months Ended
	May 02, 2017	May 03, 2016	Jun. 30, 2017	Jun. 30, 2016
Class of Stock [Line Items]
Date of declaration of dividends	May 02, 2017	May 03, 2016
Dividend declared per share	$ 0.42	$ 0.40
Date of dividend payment	Jun. 15, 2017	Jun. 15, 2016
Dividends payable to shareholders date of record	Jun. 01, 2017	Jun. 01, 2016
Non-Discretionary Plan
Class of Stock [Line Items]
Shares repurchased			1,651	1,654
Average price per share			$ 55.74	$ 48.85
Discretionary Plan
Class of Stock [Line Items]
Shares repurchased			831	1,759
Average price per share			$ 55.27	$ 48.65
Expected common stock shares issued and outstanding			170,000