Shareholders' Equity - Additional Information (Detail) - $ / shares		12 Months Ended
	Feb. 01, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stockholders Equity Note [Line Items]
Number of shares authorized to be repurchased (in shares)		86,500,000
Remaining authorized repurchase amount (in shares)		6,435,000
Employee stock purchase plan number of shares available for issuance		3,000,000
Share based compensation arrangements by share based payment award percentage of market price at eligible employees granted options to purchase shares		95.00%
Stock issued during period, shares, employee stock purchase plans (in shares)		1,359,000
Cash dividends declared, per share		$ 2.32	$ 2.20	$ 2.12
Common stock excluded from calculation of diluted earnings per share (in shares)		2,768,000	2,463,000	1,001,000
Subsequent Event
Stockholders Equity Note [Line Items]
Cash dividends declared, per share	$ 0.60