XML 132 R113.htm IDEA: XBRL DOCUMENT
v3.22.4

Shareholders' equity Schedule of Dividends Declared (Details) | 12 Months Ended
--- | ---
Dec. 31, 2022 SFr / shares | Dec. 31, 2022 $ / shares | Dec. 31, 2021 SFr / shares | Dec. 31, 2021 $ / shares | Dec. 31, 2020 SFr / shares | Dec. 31, 2020 $ / shares
Switzerland, Francs |  |  |  |  |  |
Dividends Declared [Line Items] |  |  |  |  |  |
Total dividend distributions per common share | SFr / shares | SFr 3.11 |  | SFr 2.88 |  | SFr 2.89 |
United States of America, Dollars |  |  |  |  |  |
Dividends Declared [Line Items] |  |  |  |  |  |
Total dividend distributions per common share | $ / shares |  | $ 3.29 |  | $ 3.18 |  | $ 3.09

X
- Definition [Line Items] for Dividends Declared [Table] + References No definition available. + Details
Name: | cb_DividendsDeclaredLineItems
Namespace Prefix: | cb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_CurrencyAxis=currency_CHF
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_USD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |