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Stock Options Valuation Assumptions (Detail) - $ / shares	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free interest rate	2.70%	2.00%	1.30%
Expected life (years)	5 years 6 months	5 years 6 months	5 years 6 months
Expected volatility	24.20%	25.80%	26.00%
Expected dividend yield	0.80%	0.90%	1.20%
Weighted average fair value per stock option	$ 67.65	$ 49.57	$ 29.59

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Weighted average expected volatility rate of share-based compensation awards.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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