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Stock-Based Compensation - Schedule of Fair Value of Employee Stock Options (Details) - $ / shares	Aug. 22, 2018	Jul. 16, 2018	Jul. 18, 2017	Jul. 19, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free interest rate	3.00%	3.00%	2.00%	1.00%
Expected term of options	4 years 4 months 24 days	4 years 4 months 24 days	4 years 7 months 6 days	4 years
Expected volatility	27.00%	27.00%	26.00%	26.00%
Dividend yield	2.00%	2.00%	2.00%	2.00%
Granted with exercise prices equal to the fair market value of the stock on the date of grant (usd per share)	$ 8.05	$ 8.05	$ 6.39	$ 5.50

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No definition available.

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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
-Subparagraph (f)(2)(iii)
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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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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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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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