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Capital Stock and Earnings Per Share - Capital Stock and Earnings Per Share - Additional Information (Detail) |  |  | 3 Months Ended | 6 Months Ended | 18 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 06, 2018 shares | Oct. 30, 2018 | Aug. 03, 2019 USD ($) shares | Aug. 04, 2018 USD ($) shares | Aug. 03, 2019 USD ($) shares | Aug. 04, 2018 USD ($) shares | Aug. 03, 2019 USD ($) shares | Feb. 28, 2019 USD ($) | Feb. 02, 2019 shares | Oct. 22, 2018 shares | Feb. 28, 2018 USD ($)
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock split ratio, common stock | 2 | 2 |  |  |  |  |  |  |  |  |
Issuance of common stock in result from stock split (in shares) | shares | 617,000,000 |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized (in shares) | shares | 1,800,000,000 |  | 1,800,000,000 | 1,800,000,000 | 1,800,000,000 | 1,800,000,000 | 1,800,000,000 |  | 1,800,000,000 | 600,000,000 |
Common stock repurchased and retired |  |  | $ 302,457,000 | $ 594,600,000 | $ 699,751,000 | $ 989,999,000 |  |  |  |  |
Cash payments for repurchase of common stock |  |  |  |  | 700,000,000 | $ 990,000,000 |  |  |  |  |
Remaining available stock under stock repurchase plan |  |  | $ 2,500,000,000 |  | $ 2,500,000,000 |  | $ 2,500,000,000 |  |  |  |
Antidilutive options excluded | shares |  |  | 5,900,000 | 0 | 5,900,000 | 0 |  |  |  |  |
Trade date basis |  |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock repurchased and retired (in shares) | shares |  |  | 5,600,000 |  | 12,300,000 |  |  |  |  |  |
Common stock repurchased and retired |  |  | $ 300,000,000 |  | $ 650,000,000 |  |  |  |  |  |
Stock repurchase program 2019 |  |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program, common stock purchase value |  |  |  |  |  |  |  | $ 1,500,000,000 |  |  |
Stock repurchase programs 2018 |  |  |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock repurchased and retired (in shares) | shares |  |  |  |  |  |  | 38,700,000 |  |  |  |
Common stock repurchased and retired |  |  |  |  |  |  | $ 2,000,000,000.0 |  |  |  |
Stock repurchase program, common stock purchase value |  |  |  |  |  |  |  |  |  |  | $ 3,000,000,000.0

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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