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Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Oct. 31, 2024 | Jul. 31, 2024 | Apr. 30, 2024 | Oct. 31, 2023 | Jul. 31, 2023 | Apr. 30, 2023 | Oct. 31, 2024 | Oct. 31, 2023 | Nov. 30, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Beginning balance | $ 2,474 | $ 2,161 | $ 1,855 | $ 1,206 | $ 897 | $ 1,145 | $ 1,855 | $ 1,145 |
Common shares issued under stock plans | 13 | (38) | (62) | 27 | (31) | (21) |  |  |
Stock-based compensation expense | 184 | 170 | 151 | 179 | 195 | 160 |  |  |
Settlement of liability-classified restricted common shares |  |  | 3 |  | 8 | 1 | 3 | 9 |
Net income | 275 | 282 | 252 | 241 | 222 | 161 | 809 | 624 |
Other comprehensive (loss) income | (11) | 14 | (29) | (59) | 2 | (15) | (26) | (72) |
Repurchase and retirement of common shares | (319) | (115) | (9) | (112) | (87) | (534) |  |  |
Ending balance | $ 2,616 | $ 2,474 | $ 2,161 | $ 1,482 | $ 1,206 | $ 897 | $ 2,616 | $ 1,482 |
Common Stock Repurchase Program |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Common stock repurchased and retired (in shares) | 1,190,000 |  |  | 543,000 |  |  | 1,694,000 | 4,000,000 |
Repurchased shares of its common stock on the open market, average repurchase price per share (in usd per share) | $ 269.30 |  |  | $ 205.70 |  |  | $ 262.15 | $ 200.35 |
November 2022 Common Stock Repurchase Program |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Amount remained available for repurchase under repurchase plans | $ 4,300 |  |  | $ 4,800 |  |  | $ 4,300 | $ 4,800 |
September 2016 Common Stock Repurchase Program |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Shares remained available for repurchase under repurchase plans (in shares) |  |  |  | 0 |  |  |  | 0 |
Subsequent Event | November 2022 Common Stock Repurchase Program |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Amount remained available for repurchase under repurchase plans |  |  |  |  |  |  |  |  | $ 4,300
Subsequent Event | November 2024 Common Stock Repurchase Program |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Stock repurchase authorized amount |  |  |  |  |  |  |  |  | $ 5,000
Common stock and additional paid-in capital |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Beginning balance (in shares) | 215,000,000 | 215,000,000 | 214,000,000 | 214,000,000 | 214,000,000 | 215,000,000 | 214,000,000 | 215,000,000 |
Beginning balance | $ 4,009 | $ 3,894 | $ 3,802 | $ 3,531 | $ 3,368 | $ 3,325 | $ 3,802 | $ 3,325 |
Common shares issued under stock plans (in shares) | 1,000,000 |  | 1,000,000 | 1,000,000 |  | 2,000,000 |  |  |
Common shares issued under stock plans | $ 13 | (38) | $ (62) | $ 27 | (31) | $ (21) |  |  |
Stock-based compensation expense | $ 184 | 170 | 151 | $ 179 | 195 | 160 |  |  |
Settlement of liability-classified restricted common shares |  |  | $ 3 |  | 8 | $ 1 |  |  |
Repurchase and retirement of common shares (in shares) | (1,000,000) |  |  | (1,000,000) |  | (3,000,000) |  |  |
Repurchase and retirement of common shares | $ (106) | $ (17) |  | $ (59) | $ (9) | $ (97) |  |  |
Ending balance (in shares) | 215,000,000 | 215,000,000 | 215,000,000 | 214,000,000 | 214,000,000 | 214,000,000 | 215,000,000 | 214,000,000 |
Ending balance | $ 4,100 | $ 4,009 | $ 3,894 | $ 3,678 | $ 3,531 | $ 3,368 | $ 4,100 | $ 3,678 |
Accumulated other comprehensive loss |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Beginning balance | (249) | (263) | (234) | (198) | (200) | (185) | (234) | (185) |
Other comprehensive (loss) income | (11) | 14 | (29) | (59) | 2 | (15) |  |  |
Ending balance | (260) | (249) | (263) | (257) | (198) | (200) | (260) | (257) |
Accumulated deficit |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Beginning balance | (1,286) | (1,470) | (1,713) | (2,127) | (2,271) | (1,995) | (1,713) | (1,995) |
Net income | 275 | 282 | 252 | 241 | 222 | 161 |  |  |
Repurchase and retirement of common shares | (213) | (98) | (9) | (53) | (78) | (437) |  |  |
Ending balance | $ (1,224) | $ (1,286) | $ (1,470) | $ (1,939) | $ (2,127) | $ (2,271) | $ (1,224) | $ (1,939) |

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