XML 95 R84.htm IDEA: XBRL DOCUMENT
v3.23.3

CECL (Details 7) - CHF (SFr) SFr in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | SFr 248,253 | SFr 262,108
Total | 248,339 | 262,179
Past due more than 90 days and still accruing | 0 | 0
Financial Asset, Not Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 245,296 | 259,302
Financial Asset, Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 3,043 | 2,877
Past due up to 30 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 958 | 789
Past due 31 - 60 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 468 | 220
Past due 61 - 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 209 | 98
Past due more than 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 1,408 | 1,770
Corporate and institutional |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Total | 105,039 | 107,421
Corporate and institutional | Financial Asset, Not Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 103,264 | 105,864
Corporate and institutional | Financial Asset, Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 1,775 | 1,557
Corporate and institutional | Past due up to 30 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 579 | 432
Corporate and institutional | Past due 31 - 60 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 368 | 91
Corporate and institutional | Past due 61 - 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 133 | 24
Corporate and institutional | Past due more than 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 695 | 1,010
Corporate and institutional | Real estate |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Total | 22,984 | 25,157
Corporate and institutional | Real estate | Financial Asset, Not Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 22,679 | 24,946
Corporate and institutional | Real estate | Financial Asset, Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 305 | 211
Corporate and institutional | Real estate | Past due up to 30 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 31 | 35
Corporate and institutional | Real estate | Past due 31 - 60 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 101 | 49
Corporate and institutional | Real estate | Past due 61 - 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 0 | 0
Corporate and institutional | Real estate | Past due more than 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 173 | 127
Corporate and institutional | Commercial and industrial loans |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Total | 55,816 | 59,366
Corporate and institutional | Commercial and industrial loans | Financial Asset, Not Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 54,743 | 58,267
Corporate and institutional | Commercial and industrial loans | Financial Asset, Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 1,073 | 1,099
Corporate and institutional | Commercial and industrial loans | Past due up to 30 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 424 | 320
Corporate and institutional | Commercial and industrial loans | Past due 31 - 60 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 235 | 42
Corporate and institutional | Commercial and industrial loans | Past due 61 - 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 40 | 24
Corporate and institutional | Commercial and industrial loans | Past due more than 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 374 | 713
Corporate and institutional | Financial institutions |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Total | 25,111 | 21,711
Corporate and institutional | Financial institutions | Financial Asset, Not Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 24,729 | 21,480
Corporate and institutional | Financial institutions | Financial Asset, Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 382 | 231
Corporate and institutional | Financial institutions | Past due up to 30 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 121 | 72
Corporate and institutional | Financial institutions | Past due 31 - 60 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 31 | 0
Corporate and institutional | Financial institutions | Past due 61 - 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 93 | 0
Corporate and institutional | Financial institutions | Past due more than 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 137 | 159
Corporate and institutional | Governments and public institutions |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Total | 1,128 | 1,187
Corporate and institutional | Governments and public institutions | Financial Asset, Not Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 1,113 | 1,171
Corporate and institutional | Governments and public institutions | Financial Asset, Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 15 | 16
Corporate and institutional | Governments and public institutions | Past due up to 30 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 3 | 5
Corporate and institutional | Governments and public institutions | Past due 31 - 60 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 1 | 0
Corporate and institutional | Governments and public institutions | Past due 61 - 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 0 | 0
Corporate and institutional | Governments and public institutions | Past due more than 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 11 | 11
Consumer |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Total | 141,841 | 150,808
Consumer | Financial Asset, Not Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 140,573 | 149,488
Consumer | Financial Asset, Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 1,268 | 1,320
Consumer | Past due up to 30 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 379 | 357
Consumer | Past due 31 - 60 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 100 | 129
Consumer | Past due 61 - 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 76 | 74
Consumer | Past due more than 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 713 | 760
Consumer | Mortgages |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Total | 104,202 | 107,484
Consumer | Mortgages | Financial Asset, Not Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 103,687 | 107,033
Consumer | Mortgages | Financial Asset, Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 515 | 451
Consumer | Mortgages | Past due up to 30 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 143 | 66
Consumer | Mortgages | Past due 31 - 60 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 85 | 43
Consumer | Mortgages | Past due 61 - 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 16 | 8
Consumer | Mortgages | Past due more than 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 271 | 334
Consumer | Loans collateralized by securities |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Total | 31,776 | 37,639
Consumer | Loans collateralized by securities | Financial Asset, Not Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 31,483 | 37,308
Consumer | Loans collateralized by securities | Financial Asset, Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 293 | 331
Consumer | Loans collateralized by securities | Past due up to 30 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 4 | 43
Consumer | Loans collateralized by securities | Past due 31 - 60 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 1 | 4
Consumer | Loans collateralized by securities | Past due 61 - 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 4 | 3
Consumer | Loans collateralized by securities | Past due more than 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 284 | 281
Consumer | Consumer finance |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Total | 5,863 | 5,685
Consumer | Consumer finance | Financial Asset, Not Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 5,403 | 5,147
Consumer | Consumer finance | Financial Asset, Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 460 | 538
Consumer | Consumer finance | Past due up to 30 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 232 | 248
Consumer | Consumer finance | Past due 31 - 60 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 14 | 82
Consumer | Consumer finance | Past due 61 - 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 56 | 63
Consumer | Consumer finance | Past due more than 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 158 | 145
Total loans to third parties |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Total | 246,880 | 258,229
Total loans to third parties | Financial Asset, Not Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 243,837 | 255,352
Total loans to third parties | Financial Asset, Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 3,043 | 2,877
Total loans to third parties | Past due up to 30 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 958 | 789
Total loans to third parties | Past due 31 - 60 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 468 | 220
Total loans to third parties | Past due 61 - 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 209 | 98
Total loans to third parties | Past due more than 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 1,408 | 1,770
Total loans to entities under common control |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Total | 1,459 | 3,950
Total loans to entities under common control | Financial Asset, Not Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 1,459 | 3,950
Total loans to entities under common control | Financial Asset, Past Due [Member] |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 0 | 0
Total loans to entities under common control | Past due up to 30 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 0 | 0
Total loans to entities under common control | Past due 31 - 60 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 0 | 0
Total loans to entities under common control | Past due 61 - 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | 0 | 0
Total loans to entities under common control | Past due more than 90 days |  |
Loans Held At Amortized Cost, Amortized cost, Past Due [Line Items] |  |
Gross loans held at amortized cost | SFr 0 | SFr 0

X
- Definition Amortized cost, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
Name: | us-gaap_FinancingReceivableBeforeAllowanceForCreditLossAndFee
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph (a) + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=cs_AgingAnalysisPastDueUpto30DaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=cs_AgingAnalysisPastDue31To60DaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=cs_AgingAnalysisPastDue61To90DaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=cs_AgingAnalysisPastDueOver90DaysMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialAndIndustrialSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_FinancialServicesSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_GovernmentSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_MortgageReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cs_LoansCollateralizedBySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerBorrowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=cs_TotalLoansToThirdPartiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=cs_TotalLoansToEntitiesUnderCommonControlMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |