XML 76 R60.htm IDEA: XBRL DOCUMENT
v3.25.4

Share-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract] |
Valuation assumptions | The table below summarizes the assumptions used:
| Year Ended December 31,
| 2025 |  | 2024 |  | 2023
Dividend yield | — | % |  | — | % |  | — | %
Expected volatility (1) | 26.8 | % |  | 26.5 | % |  | 25.1 | %
Risk free interest rate (1) | 4.1 | % |  | 4.4 | % |  | 4.1 | %
Expected option life (1) | 6.0 years |  | 9.0 years |  | 6.0 years
(1) The 2024 period includes an expected volatility, risk free interest rate and expected option life of 26.65%, 4.39% and 10 years, respectively, related to the grant of 1.75 million premium-priced stock options.
Option activity | A summary of stock option and SAR activity under the Company’s Long Term Incentive and Share Award Plans during 2025 is presented below:
| Year Ended December 31, 2025
| Number of Options / SARs |  | Weighted Average Exercise Price |  | Weighted Average Contractual Term |  | Aggregate Intrinsic Value
Outstanding, beginning of year | 12,429,034 |  |  | $ | 48.54 |  |  |  |  |
Granted | 426,623 |  |  | $ | 91.91 |  |  |  |  |
Exercised | (2,654,091) |  |  | $ | 23.84 |  |  |  |  |
Forfeited or expired | (12,660) |  |  | $ | 82.94 |  |  |  |  |
Outstanding, end of year | 10,188,906 |  |  | $ | 56.74 |  |  | 4.42 |  | $ | 514 |
Exercisable, end of year | 7,587,153 |  |  | $ | 29.84 |  |  | 2.94 |  | $ | 501 |
Weighted average grant date fair value |
| Year Ended December 31,
| 2025 |  | 2024 |  | 2023
Weighted average grant date fair value | $ | 32.47 |  |  | $ | 29.03 |  |  | $ | 23.50 |
Aggregate intrinsic value of Options/SARs exercised (in millions) | $ | 180 |  |  | $ | 153 |  |  | $ | 116 |
Unvested restricted share and unit activity | A summary of restricted share and restricted unit activity under the Company’s Long Term Incentive and Share Award Plans for 2025 is presented below:
| Number of Restricted Common Shares |  | Number of Restricted Unit Awards
Unvested Shares: |  |  |
Unvested balance, beginning of year | 1,528,541 |  |  | 281,093 |
Granted | 659,548 |  |  | 165,222 |
Vested | (730,148) |  |  | (141,933) |
Forfeited | (47,457) |  |  | (14,329) |
Unvested balance, end of year | 1,410,484 |  |  | 290,053 |
Weighted Average Grant Date Fair Value: |  |  |
Unvested balance, beginning of year | $ | 76.34 |  |  | $ | 73.58 |
Granted | $ | 91.87 |  |  | $ | 91.82 |
Vested | $ | 69.63 |  |  | $ | 65.98 |
Forfeited | $ | 85.55 |  |  | $ | 85.17 |
Unvested balance, end of year | $ | 86.77 |  |  | $ | 87.12 |
Performance shares and units, valuation assumptions |
| Year Ended December 31,
| 2025 |  | 2024 |  | 2023
Expected volatility | 25.5 | % |  | 25.3 | % |  | 30.4 | %
Risk free interest rate | 3.9 | % |  | 4.5 | % |  | 4.6 | %
Unvested performance share and unit activity |
| Number of Performance Shares |  | Number of Performance Units
Unvested Shares: |  |  |
Unvested balance, beginning of year | 1,679,376 |  |  | 52,937 |
Granted | 468,452 |  |  | 16,723 |
Performance adjustment (1) (2) | — |  |  | 20,009 |
Vested | (656,616) |  |  | (40,018) |
Forfeited | (14,794) |  |  | (1,596) |
Unvested balance, end of year | 1,476,418 |  |  | 48,055 |
Weighted Average Grant Date Fair Value: |  |  |
Unvested balance, beginning of year | $ | 70.07 |  |  | $ | 70.57 |
Granted | $ | 93.26 |  |  | $ | 93.26 |
Performance adjustment (1) (2) | $ | 0.00 |  |  | $ | 49.91 |
Vested | $ | 49.91 |  |  | $ | 49.91 |
Forfeited | $ | 85.70 |  |  | $ | 85.61 |
Unvested balance, end of year | $ | 86.24 |  |  | $ | 86.57 |
(1) The performance adjustment represents the difference between the number of performance shares granted and earned, which vested following the end of the performance period. The performance shares were granted at the maximum level of achievement. (2) The performance adjustment represents the change in PSUs, which vested following the end of the performance period. The performance units were granted at the target level of achievement.
Share based compensation expense | The following tables present pre-tax and after-tax share-based compensation expense recognized as well as the unrecognized compensation cost associated with unvested awards and the weighted average period over which it is expected to be recognized:
| Year Ended December 31,
| 2025 |  | 2024 |  | 2023
Pre-Tax |  |  |  |  |
Stock options and SARs | $ | 30 |  |  | $ | 15 |  |  | $ | 11 |
Restricted share and unit awards | 71 |  |  | 57 |  |  | 54 |
Performance awards | 41 |  |  | 55 |  |  | 23 |
ESPP | 6 |  |  | 6 |  |  | 4 |
Total | $ | 148 |  |  | $ | 133 |  |  | $ | 92 |
After-Tax |  |  |  |  |
Stock options and SARs | $ | 25 |  |  | $ | 13 |  |  | $ | 10 |
Restricted share and unit awards | 57 |  |  | 48 |  |  | 45 |
Performance awards | 34 |  |  | 50 |  |  | 21 |
ESPP | 6 |  |  | 5 |  |  | 4 |
Total | $ | 122 |  |  | $ | 116 |  |  | $ | 80 |
Unrecognized compensation cost |
| December 31, 2025
| Stock Options and SARs (1) |  | Restricted Common Shares and Units (1) |  | Performance Common Shares and Units
Unrecognized compensation cost related to unvested awards | $ | 38 |  |  | $ | 70 |  |  | $ | 11 |
Weighted average recognition period (years) | 1.49 |  | 1.13 |  | 0.37
(1) Includes awards granted in connection with 1.75 million premium-priced stock options and 0.3 million time-vested restricted shares granted in November 2024.
Restricted Common Shares And Restricted Units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Weighted average grant date fair value of restricted stock | The following table presents the weighted average grant date fair value of restricted shares and restricted unit awards granted and the aggregate fair value of restricted shares and unit awards vesting in each year.
| Year Ended December 31,
| 2025 |  | 2024 |  | 2023
Number of restricted shares and restricted unit awards granted | 824,770 |  |  | 982,339 |  |  | 825,191 |
Weighted average grant date fair value | $ | 91.86 |  |  | $ | 89.86 |  |  | $ | 69.42 |
Aggregate fair value of vested restricted share and unit awards (in millions) | $ | 79 |  |  | $ | 85 |  |  | $ | 122 |
Performance Common Shares and Units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Weighted average grant date fair value of restricted stock | The following table presents the weighted average grant date fair values of performance awards granted.
| Year Ended December 31,
| 2025 |  | 2024 |  | 2023
Number of performance awards | 485,175 |  |  | 492,634 |  |  | 568,576 |
Weighted average grant date fair value | $ | 93.26 |  |  | $ | 93.28 |  |  | $ | 74.09 |
Aggregate fair value of vested performance share and unit awards (in millions) | $ | 64 |  |  | $ | 61 |  |  | $ | 14 |

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of share based awards other than stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
Name: | acgl_ScheduleofSharebasedPaymentAwardOtherThanStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | acgl_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the weighted-average grant-date fair value of other than option equity instruments granted during the year. + References No definition available. + Details
Name: | acgl_SharebasedCompensationArrangementbySharebasedPaymentAwardOtherThanOptionsGrantsinPeriodWeightedAverageGrantDateFairValueTableTextBlock
Namespace Prefix: | acgl_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (i) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfUnrecognizedCompensationCostNonvestedAwardsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + 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) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(v) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 4: 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 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (l) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 35 -Paragraph 1D -Publisher FASB -URI https://asc.fasb.org/1943274/2147480483/718-10-35-1D Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 35 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480483/718-10-35-3 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 25: 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 Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of number and weighted-average grant date fair value for nonvested performance shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Subparagraph (c) -Paragraph 2 -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationPerformanceSharesAwardUnvestedActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=acgl_RestrictedCommonSharesAndRestrictedUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |