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Equity Awards - Narrative (Detail) $ / shares in Units, $ in Millions | 12 Months Ended
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Dec. 31, 2025 USD ($) plan $ / shares shares | Dec. 31, 2024 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) tranche
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of equity incentive plans | plan | 3 |  |  |
Share-based compensation arrangement by share-based payment award, number of additional shares authorized (in shares) | shares | 50,000,000 |  |  |
Total intrinsic value of options exercised | $ 12 | $ 35 | $ 15 |
Fair value of stock options vested | $ 26 | $ 98 | $ 7 |
Weighted-average grant date fair value of options granted (in USD per share) | $ / shares | $ 133.64 |  |  |
Number of shares granted (in shares) | shares | 426,000 | 0 | 0 |
Total unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested stock options | $ 47 |  |  |
Allocated share-based compensation expense | 1,955 | $ 1,746 | $ 1,604 |
Share-based payment arrangement, expense, tax benefit | $ 365 | $ 340 | 296 |
Dividend yield (in percent) | 0.00% |  |  |
Stock Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting percentage | 25.00% |  |  |
Vesting period (in years) | 3 years |  |  |
Weighted-average remaining vesting period | 2 years |  |  |
Restricted stock units with service condition only |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
RSUs (in shares) | shares | 24,300,000 |  |  |
Restricted stock units with service and performance conditions |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
RSUs (in shares) | shares | 1,700,000 |  |  |
Restricted Stock Units (RSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted-average remaining vesting period | 3 years |  |  |
RSUs (in shares) | shares | 26,011,000 | 28,940,000 |  |
Aggregate intrinsic value, vested | $ 2,600 | $ 2,400 | $ 1,600 |
Aggregate intrinsic value, outstanding | 4,000 |  |  |
Aggregated intrinsic value, expected to vest | $ 3,600 |  |  |
Weighted-average grant date fair value, granted (in USD per share) | $ / shares | $ 190.71 | $ 158.23 | $ 95.84 |
Unrecognized compensation expense expected to be recognized | $ 3,200 |  |  |
Performance shares |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Performance target (in percent) | 100.00% |  |  |
Allocated share-based compensation expense | $ 149 | $ 147 | $ 145 |
Performance shares | Minimum | Tranche one |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period (in years) | 1 year |  |  |
Performance shares | Maximum | Tranche one |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period (in years) | 3 years |  |  |
2012 Employee Stock Purchase Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common stock purchase price, percentage | 85.00% |  |  |
Award offering period | 6 months |  |  |
2021 Performance Awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Service period (in years) | 2 years |  |  |
2021 Performance Awards | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Performance target (in percent) | 0.00% |  |  |
2021 Performance Awards | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Performance target (in percent) | 200.00% |  |  |
2021 Performance Awards | Chief Executive Officer | ESPP |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Shares granted, value, share-based payment arrangement, before forfeiture |  |  |  | $ 232
Number of vesting tranches | tranche |  |  |  | 8
Options granted, exercisable period | 10 years |  |  |
2021 Performance Awards | Chief Executive Officer | ESPP | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Description of service or performance condition required to be met for earning right to award under share-based payment arrangement. Includes, but is not limited to, combination of market, performance or service condition |  |  |  | 2 years
2012 Equity Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Requisite service period to vest employment continuation period | 10 years |  |  |

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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