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Equity (Details) - USD ($) shares in Millions, $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Aug. 07, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Treasury shares balance at beginning of period (in shares) |  |  |  | 190.0 |
Balance at beginning of period |  | $ 28,778 | $ 30,716 | $ 30,508 | $ 31,527
Net income (loss) |  | 571 | 963 | 2,219 | 2,221
Distributions paid to noncontrolling interests |  |  | (2) | (28) | (3)
Acquisition of noncontrolling interest of consolidated subsidiary |  |  | (59) |  | (59)
Change in estimated redemption value of redeemable noncontrolling interest (see Note 11) |  |  |  | 66 | 0
Other comprehensive income (loss) |  | 262 | (283) | (170) | 21
Share-based compensation |  | 88 | 76 | 273 | 275
Shares issued under stock plans |  | (35) | 5 | (178) | (73)
Purchases of treasury stock (in shares) | 4.1 |  |  |  |
Purchases of treasury stock | $ (500) | $ (1,261) | (1,191) | $ (4,287) | (3,684)
Treasury shares balance at end of period (in shares) |  | 214.0 |  | 214.0 |
Balance at end of period |  | $ 28,403 | 30,225 | $ 28,403 | 30,225
Net income attributable to redeemable noncontrolling interest |  |  | 6 | 13 | 19
Distributions paid to redeemable noncontrolling interests |  |  | $ 6 | $ 13 | $ 19
European Merchant Services B.V. |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Ownership percentage by noncontrolling owner |  |  | 49.00% |  | 49.00%
Common Shares |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Common shares balance at beginning of period (in shares) |  | 784.0 | 784.0 | 784.0 | 784.0
Balance at beginning of period |  | $ 8 | $ 8 | $ 8 | $ 8
Common shares balance at end of period (in shares) |  | 784.0 | 784.0 | 784.0 | 784.0
Balance at end of period |  | $ 8 | $ 8 | $ 8 | $ 8
Treasury Stock |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Treasury shares balance at beginning of period (in shares) |  | 207.0 | 173.0 | 190.0 | 154.0
Balance at beginning of period |  | $ (15,744) | $ (10,727) | $ (12,915) | $ (8,378)
Shares issued under stock plans (in shares) |  | (1.0) |  | (4.0) | (3.0)
Shares issued under stock plans |  | $ 64 | $ 19 | $ 261 | $ 163
Purchases of treasury stock (in shares) |  | 8.0 | 9.0 | 28.0 | 31.0
Purchases of treasury stock |  | $ (1,261) | $ (1,191) | $ (4,287) | $ (3,684)
Treasury shares balance at end of period (in shares) |  | 214.0 | 182.0 | 214.0 | 182.0
Balance at end of period |  | $ (16,941) | $ (11,899) | $ (16,941) | $ (11,899)
Additional Paid-In Capital |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Balance at beginning of period |  | 23,014 | 22,988 | 23,103 | 23,011
Acquisition of noncontrolling interest of consolidated subsidiary |  |  | 6 |  | 6
Change in estimated redemption value of redeemable noncontrolling interest (see Note 11) |  |  |  | 66 |
Share-based compensation |  | 88 | 76 | 273 | 275
Shares issued under stock plans |  | (99) | (14) | (439) | (236)
Balance at end of period |  | 23,003 | 23,056 | 23,003 | 23,056
Accumulated Other Comprehensive Loss |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Balance at beginning of period |  | (1,197) | (900) | (783) | (1,189)
Other comprehensive income (loss) |  | 241 | (266) | (173) | 23
Balance at end of period |  | (956) | (1,166) | (956) | (1,166)
Retained Earnings |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Balance at beginning of period |  | 22,073 | 18,622 | 20,444 | 17,376
Net income (loss) |  | 564 | 952 | 2,193 | 2,198
Balance at end of period |  | 22,637 | 19,574 | 22,637 | 19,574
Noncontrolling Interests |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Balance at beginning of period |  | 624 | 725 | 651 | 699
Net income (loss) |  | 7 | 11 | 26 | 23
Distributions paid to noncontrolling interests |  |  | (2) | (28) | (3)
Acquisition of noncontrolling interest of consolidated subsidiary |  |  | (65) |  | (65)
Other comprehensive income (loss) |  | 21 | (17) | 3 | (2)
Balance at end of period |  | $ 652 | $ 652 | $ 652 | $ 652

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