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Significant subsidiaries and equity method investments (Details) - 12 months ended Dec. 31, 2023 € in Millions, ¥ in Millions, £ in Millions, SFr in Millions, R$ in Millions, $ in Millions, $ in Millions | USD ($) | BRL (R$) | CHF (SFr) | EUR (€) | HKD ($) | GBP (£) | JPY (¥)
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BANK-now AG |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | SFr |  |  | SFr 30.0 |  |  |  |
Banco de Investimentos Credit Suisse (Brasil) S.A. |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | R$ |  | R$ 164.8 |  |  |  |  |
Credit Suisse (Deutschland) Aktiengesellschaft |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | € |  |  |  | € 130.0 |  |  |
Credit Suisse (Hong Kong) Limited |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital |  |  |  |  | $ 8,192.9 |  |
Credit Suisse (Italy) S.P.A. |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | € |  |  |  | 170.0 |  |  |
Credit Suisse (Luxembourg) S.A. |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | SFr |  |  | 230.9 |  |  |  |
Credit Suisse (Schweiz) AG |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | SFr |  |  | 100.0 |  |  |  |
Credit Suisse (UK) Limited |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | £ |  |  |  |  |  | £ 245.2 |
Credit Suisse (USA), Inc. |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
SEC-registered debt securities maturing in July 2032 | $ 742.0 |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | $ 0.0 |  |  |  |  |  |
redit Suisse Bank (Europe), S.A. |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | € |  |  |  | € 18.0 |  |  |
Credit Suisse Funds AG |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | SFr |  |  | SFr 7.0 |  |  |  |
Credit Suisse International (Bank) |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 98.00% |  |  |  |  |  |
Nominal capital | $ 7,267.5 |  |  |  |  |  |
Equity interest held by other subsidiary in % | 98.00% |  |  |  |  |  |
Voting rights held by other subsidiary in % | 98.00% |  |  |  |  |  |
Remaining voting interests held by parent in % | 2.00% |  |  |  |  |  |
Credit Suisse Securities (Europe) Limited |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | $ 9.6 |  |  |  |  |  |
Credit Suisse Securities (Japan) Limited |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | ¥ |  |  |  |  |  |  | ¥ 78,100.0
Credit Suisse Securities (USA) LLC |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | $ 0.0 |  |  |  |  |  |
Credit Suisse Services (USA) LLC |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | $ 0.0 |  |  |  |  |  |
DLJ Mortgage Capital, Inc. |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | $ 0.0 |  |  |  |  |  |
Lime Residential Ltd |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 100.00% |  |  |  |  |  |
Nominal capital | $ 0.0 |  |  |  |  |  |
Swisscard AECS GmBH |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 50.00% |  |  |  |  |  |
ICBC Credit Suisse Asset Management Co., Ltd. |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 20.00% |  |  |  |  |  |
SIX Group AG |  |  |  |  |  |  |
Significant subsidiaries and equity method investments disclosures |  |  |  |  |  |  |
Equity interest in % | 18.00% |  |  |  |  |  |

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