XML 226 R190.htm IDEA: XBRL DOCUMENT
v3.24.1

FI - Quantitative information about level 3 assets at fair value (Details 14) | Dec. 31, 2023 CHF (SFr) | Dec. 31, 2022 CHF (SFr)
--- | --- | ---
Assets |  |
Cash and Due from Banks | SFr 128,000,000 | SFr 198,000,000
Interest-bearing deposits with banks | 0 | 14,000,000
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions | 26,237,000,000 | 40,793,000,000
Securities received as collateral | 2,222,000,000 | 2,978,000,000
Trading assets | 21,727,000,000 | 65,955,000,000
Available-for-sale Securities, Debt Securities | 4,000,000 | 796,000,000
Other investments | 2,368,000,000 | 3,730,000,000
Loans | 2,458,000,000 | 7,358,000,000
Other intangible assets (mortgage servicing rights), at fair value | 305,000,000 | 403,000,000
Other assets | 3,758,000,000 | 8,947,000,000
Recurring basis |  |
Assets |  |
Cash and Due from Banks | 128,000,000 | 198,000,000
Interest-bearing deposits with banks |  | 14,000,000
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions | 26,237,000,000 | 40,793,000,000
Securities received as collateral | 2,222,000,000 | 2,978,000,000
Trading assets | 21,727,000,000 | 65,955,000,000
Available-for-sale Securities, Debt Securities | 4,000,000 | 796,000,000
Other investments | 2,368,000,000 | 3,730,000,000
Loans | 2,458,000,000 | 7,358,000,000
Loans - of which commercial and industrial | 1,193,000,000 | 2,681,000,000
Loans - of which financial institutions | 563,000,000 | 2,989,000,000
Loans - of which government and public institutions | 586,000,000 | 1,366,000,000
Other intangible assets (mortgage servicing rights), at fair value | 305,000,000 | 403,000,000
Other assets | 3,758,000,000 | 8,947,000,000
Other assets - of which loans held-for-sale | 3,162,000,000 | 7,813,000,000
Total assets at fair value | 59,207,000,000 | 131,172,000,000
Recurring basis | Other equity investments |  |
Assets |  |
Other investments | 1,817,000,000 | 3,070,000,000
Recurring basis | Life finance instruments |  |
Assets |  |
Other investments | 439,000,000 | 587,000,000
Recurring basis | Debt securities |  |
Assets |  |
Trading assets | 10,525,000,000 | 37,614,000,000
Recurring basis | Debt securities | Debt securities issued by foreign governments |  |
Assets |  |
Trading assets | 7,883,000,000 | 15,800,000,000
Recurring basis | Debt securities | Corporate debt securities |  |
Assets |  |
Trading assets | 1,145,000,000 | 8,160,000,000
Recurring basis | Debt securities | RMBS |  |
Assets |  |
Trading assets | 993,000,000 | 10,866,000,000
Recurring basis | Debt securities | Collateralized debt obligations |  |
Assets |  |
Trading assets |  | 1,354,000,000
Recurring basis | Equity securities |  |
Assets |  |
Trading assets | 4,308,000,000 | 13,182,000,000
Recurring basis | Derivative instruments |  |
Assets |  |
Trading assets | 5,090,000,000 | 11,143,000,000
Recurring basis | Other |  |
Assets |  |
Trading assets | 1,804,000,000 | 4,016,000,000
Recurring basis | Level 3 |  |
Assets |  |
Cash and Due from Banks | 0 | 0
Interest-bearing deposits with banks |  | 0
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions | 0 | 0
Securities received as collateral | 0 | 0
Trading assets | 2,508,000,000 | 3,828,000,000
Available-for-sale Securities, Debt Securities | 0 | 0
Other investments | 1,943,000,000 | 3,313,000,000
Loans | 880,000,000 | 1,040,000,000
Loans - of which commercial and industrial | 535,000,000 | 300,000,000
Loans - of which financial institutions | 97,000,000 | 398,000,000
Loans - of which government and public institutions | 133,000,000 | 254,000,000
Other intangible assets (mortgage servicing rights), at fair value | 305,000,000 | 359,000,000
Other assets | 1,845,000,000 | 773,000,000
Other assets - of which loans held-for-sale | 1,712,000,000 | 648,000,000
Total assets at fair value | 7,481,000,000 | 9,313,000,000
Recurring basis | Level 3 | Valuation Technique, Discounted Cash Flow [Member] |  |
Assets |  |
Loans - of which commercial and industrial | 435,000,000 | 124,000,000
Loans - of which financial institutions | 33,000,000 | 282,000,000
Loans - of which government and public institutions | 126,000,000 | 158,000,000
Other assets - of which loans held-for-sale | SFr 229,000,000 | SFr 258,000,000
Recurring basis | Level 3 | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Credit Spread [Member] | Minimum |  |
Assets |  |
Loans - of which commercial and industrial, measurement input | 19 | 280
Loans - of which financial institutions, measurement input | 159 | 242
Loans - of which government and public institutions, measurement input | 154 | 534
Other assets - of which loans held-for-sale, measurement input | 315 | 299
Recurring basis | Level 3 | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Credit Spread [Member] | Maximum |  |
Assets |  |
Loans - of which commercial and industrial, measurement input | 444 | 2,596
Loans - of which financial institutions, measurement input | 506 | 1,278
Loans - of which government and public institutions, measurement input | 1,217 | 1,339
Other assets - of which loans held-for-sale, measurement input | 380 | 594
Recurring basis | Level 3 | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Credit Spread [Member] | Weighted average |  |
Assets |  |
Loans - of which commercial and industrial, measurement input | 41 | 756
Loans - of which financial institutions, measurement input | 217 | 497
Loans - of which government and public institutions, measurement input | 864 | 680
Other assets - of which loans held-for-sale, measurement input | 316 | 368
Recurring basis | Level 3 | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Recovery rate [Member] | Minimum |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 65 | 55
Recurring basis | Level 3 | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Recovery rate [Member] | Maximum |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 65 | 55
Recurring basis | Level 3 | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Recovery rate [Member] | Weighted average |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 65 | 55
Recurring basis | Level 3 | Price |  |
Assets |  |
Loans - of which commercial and industrial | SFr 90,000,000 | SFr 153,000,000
Loans - of which financial institutions | 62,000,000 | 115,000,000
Loans - of which government and public institutions | 6,000,000 | 96,000,000
Other assets - of which loans held-for-sale | SFr 144,000,000 | SFr 14,000,000
Recurring basis | Level 3 | Price | Measurement Input, Price in percent [Member] | Minimum |  |
Assets |  |
Loans - of which commercial and industrial, measurement input | 11 | 6
Loans - of which financial institutions, measurement input | 23 | 22
Loans - of which government and public institutions, measurement input | 56 | 35
Other assets - of which loans held-for-sale, measurement input | 0 | 0
Recurring basis | Level 3 | Price | Measurement Input, Price in percent [Member] | Maximum |  |
Assets |  |
Loans - of which commercial and industrial, measurement input | 97 | 100
Loans - of which financial institutions, measurement input | 75 | 72
Loans - of which government and public institutions, measurement input | 56 | 42
Other assets - of which loans held-for-sale, measurement input | 91 | 79
Recurring basis | Level 3 | Price | Measurement Input, Price in percent [Member] | Weighted average |  |
Assets |  |
Loans - of which commercial and industrial, measurement input | 58 | 53
Loans - of which financial institutions, measurement input | 43 | 66
Loans - of which government and public institutions, measurement input | 56 | 36
Other assets - of which loans held-for-sale, measurement input | 85 | 59
Recurring basis | Level 3 | Market comparable |  |
Assets |  |
Loans - of which commercial and industrial | SFr 11,000,000 | SFr 22,000,000
Other assets - of which loans held-for-sale | SFr 1,314,000,000 | SFr 363,000,000
Recurring basis | Level 3 | Market comparable | Measurement Input, Price in percent [Member] | Minimum |  |
Assets |  |
Loans - of which commercial and industrial, measurement input | 76 | 74
Other assets - of which loans held-for-sale, measurement input | 0 | 0
Recurring basis | Level 3 | Market comparable | Measurement Input, Price in percent [Member] | Maximum |  |
Assets |  |
Loans - of which commercial and industrial, measurement input | 76 | 74
Other assets - of which loans held-for-sale, measurement input | 120 | 145
Recurring basis | Level 3 | Market comparable | Measurement Input, Price in percent [Member] | Weighted average |  |
Assets |  |
Loans - of which commercial and industrial, measurement input | 76 | 74
Other assets - of which loans held-for-sale, measurement input | 70 | 78
Recurring basis | Level 3 | Other equity investments |  |
Assets |  |
Other investments | SFr 1,493,000,000 | SFr 2,725,000,000
Recurring basis | Level 3 | Other equity investments | Option model |  |
Assets |  |
Other investments | 1,000,000 |
Recurring basis | Level 3 | Other equity investments | Option model | Measurement Input, Price Volatility [Member] | Minimum |  |
Assets |  |
Other investments | 98 |
Recurring basis | Level 3 | Other equity investments | Option model | Measurement Input, Price Volatility [Member] | Maximum |  |
Assets |  |
Other investments | 693 |
Recurring basis | Level 3 | Other equity investments | Option model | Measurement Input, Price Volatility [Member] | Weighted average |  |
Assets |  |
Other investments | 396 |
Recurring basis | Level 3 | Other equity investments | Valuation Technique, Discounted Cash Flow [Member] |  |
Assets |  |
Other investments |  | 46,000,000
Recurring basis | Level 3 | Other equity investments | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Minimum |  |
Assets |  |
Other investments |  | 8
Recurring basis | Level 3 | Other equity investments | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Maximum |  |
Assets |  |
Other investments |  | 8
Recurring basis | Level 3 | Other equity investments | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Weighted average |  |
Assets |  |
Other investments |  | 8
Recurring basis | Level 3 | Other equity investments | Price |  |
Assets |  |
Other investments | 417,000,000 | 174,000,000
Recurring basis | Level 3 | Other equity investments | Price | Measurement Input, Price Volatility [Member] | Minimum |  |
Assets |  |
Other investments | 0 | 1
Recurring basis | Level 3 | Other equity investments | Price | Measurement Input, Price Volatility [Member] | Maximum |  |
Assets |  |
Other investments | 9,271 | 15
Recurring basis | Level 3 | Other equity investments | Price | Measurement Input, Price Volatility [Member] | Weighted average |  |
Assets |  |
Other investments | 1,050 | 13
Recurring basis | Level 3 | Other equity investments | Market comparable |  |
Assets |  |
Other investments | 1,065,000,000 | 2,443,000,000
Recurring basis | Level 3 | Other equity investments | Market comparable | Measurement Input, Price Volatility [Member] | Minimum |  |
Assets |  |
Other investments | 0 | 0
Recurring basis | Level 3 | Other equity investments | Market comparable | Measurement Input, Price Volatility [Member] | Maximum |  |
Assets |  |
Other investments | 100 | 275
Recurring basis | Level 3 | Other equity investments | Market comparable | Measurement Input, Price Volatility [Member] | Weighted average |  |
Assets |  |
Other investments | 7 | 109
Recurring basis | Level 3 | Life finance instruments |  |
Assets |  |
Other investments | 439,000,000 | 587,000,000
Recurring basis | Level 3 | Life finance instruments | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Market implied life expectancy [Member] | Minimum |  |
Assets |  |
Other investments | 2 | 2
Recurring basis | Level 3 | Life finance instruments | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Market implied life expectancy [Member] | Maximum |  |
Assets |  |
Other investments | 14 | 15
Recurring basis | Level 3 | Life finance instruments | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Market implied life expectancy [Member] | Weighted average |  |
Assets |  |
Other investments | 6 | 6
Recurring basis | Level 3 | Debt securities |  |
Assets |  |
Trading assets | 718,000,000 | 1,211,000,000
Recurring basis | Level 3 | Debt securities | Debt securities issued by foreign governments |  |
Assets |  |
Trading assets | 38,000,000 | 86,000,000
Recurring basis | Level 3 | Debt securities | Corporate debt securities |  |
Assets |  |
Trading assets | 515,000,000 | 413,000,000
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Discounted Cash Flow [Member] |  |
Assets |  |
Trading assets | SFr 82,000,000 | SFr 118,000,000
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Credit Spread [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 35 | 10
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Credit Spread [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 668 | 7,589
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Credit Spread [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 585 | 620
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Price in percent [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input |  | 0
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Price in percent [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input |  | 101
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Price in percent [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input |  | 53
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] |  |
Assets |  |
Trading assets | SFr 1,000,000 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Credit Spread [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 30 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Credit Spread [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 148 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Credit Spread [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 0 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Correlation [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | (50) |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Correlation [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 100 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Correlation [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 69 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Mean reversion [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 7 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Mean reversion [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 25 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Mean reversion [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 0 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Price in percent [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 30 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Price in percent [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 100 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Price in percent [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 38 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Volatility [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 5 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Volatility [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 142 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Volatility [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 40 |
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Price |  |
Assets |  |
Trading assets | SFr 411,000,000 | SFr 216,000,000
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Price | Measurement Input, Price Volatility [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input |  | 0
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Price | Measurement Input, Price Volatility [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input |  | 11,640
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Price | Measurement Input, Price Volatility [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input |  | 2,203
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Price | Measurement Input, Price in percent [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 76 | 30
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Price | Measurement Input, Price in percent [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 126 | 126
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Price | Measurement Input, Price in percent [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 102 | 87
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Market comparable |  |
Assets |  |
Trading assets | SFr 5,000,000 | SFr 75,000,000
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Market comparable | Measurement Input, Price Volatility [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input |  | 1
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Market comparable | Measurement Input, Price Volatility [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input |  | 218
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Market comparable | Measurement Input, Price Volatility [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input |  | 29
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Market comparable | Measurement Input, Price in percent [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 0 | 0
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Market comparable | Measurement Input, Price in percent [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 101 | 101
Recurring basis | Level 3 | Debt securities | Corporate debt securities | Market comparable | Measurement Input, Price in percent [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 13 | 51
Recurring basis | Level 3 | Debt securities | RMBS |  |
Assets |  |
Trading assets | SFr 57,000,000 | SFr 444,000,000
Recurring basis | Level 3 | Debt securities | RMBS | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 8 | 3
Recurring basis | Level 3 | Debt securities | RMBS | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 19 | 33
Recurring basis | Level 3 | Debt securities | RMBS | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 16 | 12
Recurring basis | Level 3 | Debt securities | Collateralized debt obligations |  |
Assets |  |
Trading assets |  | SFr 216,000,000
Recurring basis | Level 3 | Equity securities |  |
Assets |  |
Trading assets | SFr 100,000,000 | 222,000,000
Recurring basis | Level 3 | Derivative instruments |  |
Assets |  |
Trading assets | 1,179,000,000 | 1,661,000,000
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives |  |
Assets |  |
Trading assets | 47,000,000 | 671,000,000
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model |  |
Assets |  |
Trading assets |  | SFr 662,000,000
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model | Measurement Input, Contingent probability [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input |  | 95
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model | Measurement Input, Contingent probability [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input |  | 95
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model | Measurement Input, Contingent probability [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input |  | 95
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model | Measurement Input, Mean reversion [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input |  | 25
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model | Measurement Input, Mean reversion [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input |  | 25
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model | Measurement Input, Mean reversion [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input |  | 25
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model | Measurement Input, Prepayment Rate [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input |  | 14
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model | Measurement Input, Prepayment Rate [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input |  | 19
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model | Measurement Input, Prepayment Rate [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input |  | 17
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model | Measurement Input, Volatility [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input |  | (3)
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model | Measurement Input, Volatility [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input |  | 1
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Option model | Measurement Input, Volatility [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input |  | (1)
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Valuation Technique, Discounted Cash Flow [Member] |  |
Assets |  |
Trading assets |  | SFr 1,000,000
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Volatility [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input |  | 95
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Volatility [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input |  | 110
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Volatility [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input |  | 103
Recurring basis | Level 3 | Derivative instruments | Foreign exchange derivatives |  |
Assets |  |
Trading assets | 33,000,000 | SFr 17,000,000
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products |  |
Assets |  |
Trading assets | 484,000,000 | 295,000,000
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Option model |  |
Assets |  |
Trading assets | SFr 356,000,000 |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Option model | Measurement Input, Correlation [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | (50) |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Option model | Measurement Input, Correlation [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 100 |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Option model | Measurement Input, Correlation [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 69 |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Option model | Measurement Input, Volatility [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 5 |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Option model | Measurement Input, Volatility [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 142 |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Option model | Measurement Input, Volatility [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 37 |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Mean reversion [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 7 |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Mean reversion [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 25 |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Valuation Technique, Option Pricing Model [Member] | Measurement Input, Mean reversion [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 16 |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Price |  |
Assets |  |
Trading assets | SFr 90,000,000 |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Price | Measurement Input, Price in percent [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 95 |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Price | Measurement Input, Price in percent [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 95 |
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products | Price | Measurement Input, Price in percent [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 95 |
Recurring basis | Level 3 | Derivative instruments | Credit derivatives |  |
Assets |  |
Trading assets |  | 130,000,000
Recurring basis | Level 3 | Derivative instruments | Other derivatives |  |
Assets |  |
Trading assets | SFr 499,000,000 | SFr 548,000,000
Recurring basis | Level 3 | Derivative instruments | Other derivatives | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Market implied life expectancy [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 2 | 2
Recurring basis | Level 3 | Derivative instruments | Other derivatives | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Market implied life expectancy [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 12 | 13
Recurring basis | Level 3 | Derivative instruments | Other derivatives | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Market implied life expectancy [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 6 | 6
Recurring basis | Level 3 | Derivative instruments | Other derivatives | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, UK Mortality Rate [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 75 | 74
Recurring basis | Level 3 | Derivative instruments | Other derivatives | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, UK Mortality Rate [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 141 | 139
Recurring basis | Level 3 | Derivative instruments | Other derivatives | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, UK Mortality Rate [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 100 | 99
Recurring basis | Level 3 | Other |  |
Assets |  |
Trading assets | SFr 511,000,000 | SFr 734,000,000
Recurring basis | Level 3 | Other | Option model |  |
Assets |  |
Trading assets | SFr 11,000,000 | SFr 25,000,000
Recurring basis | Level 3 | Other | Option model | Measurement Input, Mortality Rate [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 0 | 0
Recurring basis | Level 3 | Other | Option model | Measurement Input, Mortality Rate [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 70 | 70
Recurring basis | Level 3 | Other | Option model | Measurement Input, Mortality Rate [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 6 | 6
Recurring basis | Level 3 | Other | Valuation Technique, Discounted Cash Flow [Member] |  |
Assets |  |
Trading assets | SFr 372,000,000 | SFr 458,000,000
Recurring basis | Level 3 | Other | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Market implied life expectancy [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 3 | 3
Recurring basis | Level 3 | Other | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Market implied life expectancy [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 12 | 13
Recurring basis | Level 3 | Other | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Market implied life expectancy [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 6 | 6
Recurring basis | Level 3 | Other | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Tax Swap Rate [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input |  | 30
Recurring basis | Level 3 | Other | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Tax Swap Rate [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input |  | 30
Recurring basis | Level 3 | Other | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Tax Swap Rate [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input |  | 30
Recurring basis | Level 3 | Other | Market comparable |  |
Assets |  |
Trading assets | SFr 127,000,000 | SFr 251,000,000
Recurring basis | Level 3 | Other | Market comparable | Measurement Input, Price in percent [Member] | Minimum |  |
Assets |  |
Trading assets, measurement input | 0 | 0
Recurring basis | Level 3 | Other | Market comparable | Measurement Input, Price in percent [Member] | Maximum |  |
Assets |  |
Trading assets, measurement input | 105 | 109
Recurring basis | Level 3 | Other | Market comparable | Measurement Input, Price in percent [Member] | Weighted average |  |
Assets |  |
Trading assets, measurement input | 8 | 27
Nonrecurring basis |  |
Assets |  |
Other investments | SFr 1,206,000,000 | SFr 365,000,000
Loans | 13,000,000 | 15,000,000
Other assets | 9,631,000,000 | 83,000,000
Total assets at fair value | 10,850,000,000 | 463,000,000
Nonrecurring basis | Equity securities |  |
Assets |  |
Other investments | 1,200,000,000 | 78,000,000
Nonrecurring basis | Equity securities (without a readily determinable fair value) |  |
Assets |  |
Other investments |  | 287,000,000
Nonrecurring basis | Other assets |  |
Assets |  |
Other assets - of which loans held-for-sale | 8,917,000,000 | 71,000,000
Other assets - of which real estate held-for-sale |  | 12,000,000
Nonrecurring basis | Level 3 |  |
Assets |  |
Other investments | 1,206,000,000 | 106,000,000
Loans | 13,000,000 | 1,000,000
Other assets | 8,903,000,000 | 44,000,000
Total assets at fair value | SFr 10,122,000,000 | SFr 151,000,000
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Credit Spread [Member] | Minimum |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 6 |
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Credit Spread [Member] | Maximum |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 2,471 |
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Credit Spread [Member] | Weighted average |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 614 |
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Discount Rate [Member] | Minimum |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 9 |
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Discount Rate [Member] | Maximum |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 10 |
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Discount Rate [Member] | Weighted average |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 9 |
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Price Volatility [Member] | Minimum |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input |  | 0
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Price Volatility [Member] | Maximum |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input |  | 144
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Price Volatility [Member] | Weighted average |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input |  | 55
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Price in percent [Member] | Minimum |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 82 | 90
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Price in percent [Member] | Maximum |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 8,988 | 90
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Price in percent [Member] | Weighted average |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 84 | 90
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Price per share, in actuals [Member] | Minimum |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 0 |
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Price per share, in actuals [Member] | Maximum |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 98 |
Nonrecurring basis | Level 3 | Market comparable | Measurement Input, Price per share, in actuals [Member] | Weighted average |  |
Assets |  |
Other assets - of which loans held-for-sale, measurement input | 93 |
Nonrecurring basis | Level 3 | Other equity investments | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Credit Spread [Member] |  |
Assets |  |
Other investments | SFr 673,000,000 |
Nonrecurring basis | Level 3 | Other equity investments | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] |  |
Assets |  |
Other investments | 71,000,000 |
Nonrecurring basis | Level 3 | Other equity investments | Market comparable | Measurement Input, Price in percent [Member] |  |
Assets |  |
Other investments | 480,000,000 |
Nonrecurring basis | Level 3 | Other equity investments | Market comparable | Measurement Input, Price per share, in actuals [Member] |  |
Assets |  |
Other investments | 6,966,000,000 |
Nonrecurring basis | Level 3 | Equity securities |  |
Assets |  |
Other investments | 1,200,000,000 | SFr 78,000,000
Nonrecurring basis | Level 3 | Equity securities | Valuation Technique, Discounted Cash Flow [Member] |  |
Assets |  |
Other investments | 1,062,000,000 |
Nonrecurring basis | Level 3 | Equity securities | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Minimum |  |
Assets |  |
Other investments | 8 | 8
Nonrecurring basis | Level 3 | Equity securities | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Maximum |  |
Assets |  |
Other investments | 10 | 18
Nonrecurring basis | Level 3 | Equity securities | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Weighted average |  |
Assets |  |
Other investments | 8 | 15
Nonrecurring basis | Level 3 | Equity securities | Market comparable |  |
Assets |  |
Other investments | 138,000,000 |
Nonrecurring basis | Level 3 | Equity securities | Market comparable | Measurement Input, Price Volatility [Member] | Minimum |  |
Assets |  |
Other investments | 1 |
Nonrecurring basis | Level 3 | Equity securities | Market comparable | Measurement Input, Price Volatility [Member] | Maximum |  |
Assets |  |
Other investments | 2,095 |
Nonrecurring basis | Level 3 | Equity securities | Market comparable | Measurement Input, Price Volatility [Member] | Weighted average |  |
Assets |  |
Other investments | 138 |
Nonrecurring basis | Level 3 | Equity securities (without a readily determinable fair value) |  |
Assets |  |
Other investments |  | 28,000,000
Nonrecurring basis | Level 3 | Equity securities (without a readily determinable fair value) | Valuation Technique, Discounted Cash Flow [Member] |  |
Assets |  |
Other investments |  | 13,000,000
Nonrecurring basis | Level 3 | Equity securities (without a readily determinable fair value) | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Minimum |  |
Assets |  |
Other investments |  | 12
Nonrecurring basis | Level 3 | Equity securities (without a readily determinable fair value) | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Maximum |  |
Assets |  |
Other investments |  | 16
Nonrecurring basis | Level 3 | Equity securities (without a readily determinable fair value) | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Weighted average |  |
Assets |  |
Other investments |  | 14
Nonrecurring basis | Level 3 | Equity securities (without a readily determinable fair value) | Market comparable |  |
Assets |  |
Other investments |  | 13,000,000
Nonrecurring basis | Level 3 | Equity securities (without a readily determinable fair value) | Market comparable | Measurement Input, Price Volatility [Member] | Minimum |  |
Assets |  |
Other investments |  | 3
Nonrecurring basis | Level 3 | Equity securities (without a readily determinable fair value) | Market comparable | Measurement Input, Price Volatility [Member] | Maximum |  |
Assets |  |
Other investments |  | 6,181
Nonrecurring basis | Level 3 | Equity securities (without a readily determinable fair value) | Market comparable | Measurement Input, Price Volatility [Member] | Weighted average |  |
Assets |  |
Other investments |  | 1,310
Nonrecurring basis | Level 3 | Other assets |  |
Assets |  |
Other assets - of which loans held-for-sale | SFr 8,189,000,000 | 32,000,000
Other assets - of which real estate held-for-sale |  | SFr 12,000,000

X
- Definition For interest-bearing deposits from banks, this element represents the portion of the balance sheet assertion valued at fair value by the entity. + References No definition available. + Details
Name: | cs_InterestBearingDepositsInBanksReportedAtFairValue
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Reflects loans and leases receivable held in the entity's portfolio that are issued to commercial and industrial businesses for cash needs or a financial asset purchase. + References No definition available. + Details
Name: | cs_LoansAndLeasesReceivableCommercialAndIndustrialFairValueDisclosure
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Reflects loans and leases receivable held in the entity's portfolio that are issued to financial institutions for cash needs or a financial asset purchase. + References No definition available. + Details
Name: | cs_LoansAndLeasesReceivableFinancialInstitutionsFairValueDisclosure
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Reflects loans and leases receivable held in the entity's portfolio that are issued to government and public institutions for cash needs or a financial asset purchase. + References No definition available. + Details
Name: | cs_LoansAndLeasesReceivableGovernmentAndPublicInstitutionsFairValueDisclosure
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. This item represents the amount of other investments as presented on the statement of financial position which may include equity method investments, non-marketable equity securities, real estate held for investment, insurance products and other investments. + References No definition available. + Details
Name: | cs_OtherInvestmentsAtFairValue
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | cs_RealEstateHeldforsaleFairValueDisclosure
Namespace Prefix: | cs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481830/320-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of federal funds sold and securities borrowed or purchased under agreements to resell. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(3)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
Name: | us-gaap_FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables. + References No definition available. + Details
Name: | us-gaap_LoansHeldForSaleFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Value of input used to measure loan, held for sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_LoansHeldForSaleMeasurementInput
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Publisher FASB -URI https://asc.fasb.org//310-10/tableOfContent + Details
Name: | us-gaap_LoansReceivableFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of other assets. + References No definition available. + Details
Name: | us-gaap_OtherAssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying amount (fair value) as of the balance sheet date of securities held that had been pledged by counterparties under financing and lending arrangements, pursuant to which the entity has the right by agreement or custom to sell or re-pledge such securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-5 + Details
Name: | us-gaap_SecuritiesHeldAsCollateralAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481229/860-50-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481260/860-50-45-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481260/860-50-45-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481260/860-50-45-2 + Details
Name: | us-gaap_ServicingAssetAtFairValueAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483467/210-10-45-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
Name: | us-gaap_TradingSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=cs_OtherEquityInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_LifeAndAnnuityInsuranceProductLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_DebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CollateralizedDebtObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_DerivativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=cs_OtherInvestmentCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=us-gaap_ValuationTechniqueDiscountedCashFlowMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputCreditSpreadMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=cs_MeasurementInputRecoveryRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=cs_PriceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=cs_MeasurementInputPriceInPercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=us-gaap_MarketApproachValuationTechniqueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=cs_OptionModelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPriceVolatilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=cs_MeasurementInputMarketImpliedLifeExpectancyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=us-gaap_ValuationTechniqueOptionPricingModelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=cs_MeasurementInputCorrelationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=cs_MeasurementInputMeanReversionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=cs_MeasurementInputVolatilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_InterestRateContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=cs_MeasurementInputContingentProbabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPrepaymentRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_EquityContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CreditRiskContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=cs_OtherDerivativesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=cs_MeasurementInputUKMortalityRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputMortalityRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=cs_MeasurementInputTaxSwapRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=cs_EquitySecuritiesWithoutAReadilyDeterminableFairValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_OtherAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=cs_MeasurementInputPricePerShareInActualsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |