XML 46 R33.htm IDEA: XBRL DOCUMENT
v3.20.2

Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
Comprehensive Income Note Disclosure [Abstract] |
Details about amounts reclassified from AOCI | The following tables present details about amounts reclassified from accumulated other comprehensive income and the tax effects allocated to each component of other comprehensive income (loss):
|  |  |  | Amounts Reclassified from AOCI
|  | Consolidated Statement of Income |  | Three Months Ended |  | Nine Months Ended
Details About |  | Line Item That Includes |  | September 30, |  | September 30,
AOCI Components |  | Reclassification |  | 2020 |  | 2019 |  | 2020 |  | 2019
Unrealized appreciation on available-for-sale investments |  |  |  |  |  |  |  |
|  | Net realized gains (losses) |  | $ | 87,871 |  |  | $ | 43,124 |  |  | $ | 416,432 |  |  | $ | 114,642 |
|  | Provision for credit losses |  | 1,333 |  |  |  |  | (4,762) |  |  |
|  | Other-than-temporary impairment losses |  | — |  |  | (1,163) |  |  | (533) |  |  | (2,521) |
|  | Total before tax |  | 89,204 |  |  | 41,961 |  |  | 411,137 |  |  | 112,121 |
|  | Income tax (expense) benefit |  | (9,401) |  |  | (3,218) |  |  | (42,714) |  |  | (7,812) |
|  | Net of tax |  | $ | 79,803 |  |  | $ | 38,743 |  |  | $ | 368,423 |  |  | $ | 104,309 |
Schedule of comprehensive income (loss) |
| Before Tax Amount |  | Tax Expense (Benefit) |  | Net of Tax Amount
Three Months Ended September 30, 2020 |  |  |  |  |
Unrealized appreciation (decline) in value of investments: |  |  |  |  |
Unrealized holding gains (losses) arising during period | $ | 119,265 |  |  | $ | 8,483 |  |  | $ | 110,782 |
Less reclassification of net realized gains (losses) included in net income | 89,204 |  |  | 9,401 |  |  | 79,803 |
Foreign currency translation adjustments | 16,918 |  |  | 209 |  |  | 16,709 |
Other comprehensive income (loss) | $ | 46,979 |  |  | $ | (709) |  |  | $ | 47,688 |
Three Months Ended September 30, 2019 |  |  |  |  |
Unrealized appreciation (decline) in value of investments: |  |  |  |  |
Unrealized holding gains (losses) arising during period | $ | 70,449 |  |  | $ | 11,159 |  |  | $ | 59,290 |
Less reclassification of net realized gains (losses) included in net income | 41,961 |  |  | 3,218 |  |  | 38,743 |
Foreign currency translation adjustments | (16,507) |  |  | (83) |  |  | (16,424) |
Other comprehensive income (loss) | $ | 11,981 |  |  | $ | 7,858 |  |  | $ | 4,123 |
Nine Months Ended September 30, 2020 |  |  |  |  |
Unrealized appreciation (decline) in value of investments: |  |  |  |  |
Unrealized holding gains (losses) arising during period | $ | 611,390 |  |  | $ | 65,099 |  |  | $ | 546,291 |
Less reclassification of net realized gains (losses) included in net income | 411,137 |  |  | 42,714 |  |  | 368,423 |
Foreign currency translation adjustments | (5,911) |  |  | (182) |  |  | (5,729) |
Other comprehensive income (loss) | $ | 194,342 |  |  | $ | 22,203 |  |  | $ | 172,139 |
Nine Months Ended September 30, 2019 |  |  |  |  |
Unrealized appreciation (decline) in value of investments: |  |  |  |  |
Unrealized holding gains (losses) arising during period | $ | 573,513 |  |  | $ | 65,863 |  |  | $ | 507,650 |
Less reclassification of net realized gains (losses) included in net income | 112,121 |  |  | 7,812 |  |  | 104,309 |
Foreign currency translation adjustments | (6,454) |  |  | 187 |  |  | (6,641) |
Other comprehensive income (loss) | $ | 454,938 |  |  | $ | 58,238 |  |  | $ | 396,700 |

X
- Definition Comprehensive Income Note Disclosure [Abstract] + References No definition available. + Details
Name: | acgl_ComprehensiveIncomeNoteDisclosureAbstract
Namespace Prefix: | acgl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
Name: | us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e526-108580 + Details
Name: | us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration