Share-Based Compensation, Performance-Based Market Stock Units (Details)	12 Months Ended
Aug. 02, 2019 shares
2019 rTSR RSUs [Member]
Performance-Based Market Stock Units [Abstract]
Number of shares accrued (in shares)	3,675
2018 rTSR RSUs [Member]
Performance-Based Market Stock Units [Abstract]
Number of shares accrued (in shares)	5,722
2017 rTSR RSUs [Member]
Performance-Based Market Stock Units [Abstract]
Number of shares accrued (in shares)	7,548
2016 MSU Grants [Member]
Fair Value Assumptions and Methodology [Abstract]
Expected volatility, minimum	23.00%
Expected volatility, maximum	24.00%
Risk-free interest rate, minimum	0.90%
Risk-free interest rate, maximum	1.00%
Omnibus Plan 2010 [Member] \| MSU Grants [Member]
Performance-Based Market Stock Units [Abstract]
Award performance period	3 years

Number of shares accrued based upon the change in total shareholder return.

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- Definition

Period in which employees' performance is measured as a criteria for share-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The estimated measure of the maximum 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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No definition available.

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- Definition

The estimated measure of the minimum 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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No definition available.

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- Definition

The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

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No definition available.

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- Definition

The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

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No definition available.

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