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Earnings Per Share - Narrative (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 23 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 09, 2020 | Aug. 31, 2020 | Aug. 31, 2019 | Oct. 09, 2020 | Oct. 29, 2019 | Oct. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Options granted and excluded from the computation of diluted earnings per share (in shares) |  | 200,000 |  |  |  |
Stock purchased under share buyback |  | $ 69,011,000 | $ 256,830,000 |  |  |
Employee Payroll Taxes Due on Restricted Stock |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Stock purchased under share buyback (shares) |  | 200,000 | 200,000 |  |  |
Stock purchased under share buyback, average price per share (in dollars per share) |  | $ 300.01 | $ 260.83 |  |  |
Stock purchased under share buyback |  | $ 69,000,000.0 | $ 63,700,000 |  |  |
October 30, 2018 Plan |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Share buyback program, authorized amount |  |  |  |  |  | $ 1,000,000,000.0
Stock purchased under share buyback (shares) |  | 0 | 837,000 |  |  |
Stock purchased under share buyback, average price per share (in dollars per share) |  | $ 0 | $ 230.66 |  |  |
Stock purchased under share buyback |  | $ 0 | $ 193,109,000 |  |  |
October 29, 2019 Plan |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Share buyback program, authorized amount |  |  |  |  | $ 1,000,000,000.0 |
Stock purchased under share buyback (shares) |  | 0 | 0 |  |  |
Stock purchased under share buyback, average price per share (in dollars per share) |  | $ 0 | $ 0 |  |  |
Stock purchased under share buyback |  | $ 0 | $ 0 |  |  |
Subsequent Event |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Stock purchased under share buyback (shares) | 0 |  |  |  |  |
Subsequent Event | October 30, 2018 Plan |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |
Stock purchased under share buyback (shares) |  |  |  | 4,300,000 |  |
Stock purchased under share buyback, average price per share (in dollars per share) |  |  |  | $ 219.42 |  |
Stock purchased under share buyback |  |  |  | $ 939,100,000 |  |

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