XML 199 R163.htm IDEA: XBRL DOCUMENT
v3.24.1

Pension and other post-retirement benefits - Mortality tables and life expectancies (Details 9) - year | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022
SAPS S3 [Member] |  |  |
Defined benefit plan, Disclosure |  |  |
Continuous Mortality Investigation (CMI) model, long-term improvement rate |  | 1.25% |
UK | SAPS S3 [Member] | 65 |  |  |
Defined benefit plan, Disclosure |  |  |
Life expectancy rate at age 65, Male | [1] | 23.1 | 23.5
Life expectancy rate at age 65, Female | [1] | 24.7 | 25.1
UK | SAPS S3 [Member] | 45 |  |  |
Defined benefit plan, Disclosure |  |  |
Life expectancy rate at age 65, Male | [1] | 24.3 | 24.8
Life expectancy rate at age 65, Female | [1] | 26.1 | 26.5
US | Pri-2012 [Member] | 65 |  |  |
Defined benefit plan, Disclosure |  |  |
Life expectancy rate at age 65, Male | [2] | 22.0 | 20.7
Life expectancy rate at age 65, Female | [2] | 23.5 | 22.6
US | Pri-2012 [Member] | 45 |  |  |
Defined benefit plan, Disclosure |  |  |
Life expectancy rate at age 65, Male | [2] | 23.4 | 21.9
Life expectancy rate at age 65, Female | [2] | 24.8 | 23.7
[1] | 102% of Self-Administered Pension Scheme (SAPS) S3 light tables were used, which included CMI projections, with a long-term rate of improvement of 1.25% per annum.
[2] | The Private retirement plan 2012 (Pri-2012) mortality tables were used, with projections based on the Social Security Administration's intermediate improvement scale.

X
- References No definition available. + Details
Name: | cs_LifeExpectancyRateAtAge65Female
Namespace Prefix: | cs_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | cs_LifeExpectancyRateAtAge65Male
Namespace Prefix: | cs_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=cs_SAPSS3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cs_AgeAxis=cs_Age65Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cs_AgeAxis=cs_Age45Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=cs_Pri2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |