Pension and other post-retirement benefits - Weighted-average assumptions (Details 5) - Defined benefit pension plans
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Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
| Switzerland |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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100.00%
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100.00%
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| Switzerland | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
100.00%
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| Switzerland | Cash and cash equivalents |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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1.60%
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2.50%
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| Switzerland | Cash and cash equivalents | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
7.00%
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| Switzerland | Debt securities |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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35.20%
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32.70%
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| Switzerland | Debt securities | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
32.00%
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| Switzerland | Equity securities |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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27.30%
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29.60%
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| Switzerland | Equity securities | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
25.00%
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| Switzerland | Real estate |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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18.40%
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18.00%
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| Switzerland | Real estate | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
21.00%
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| Switzerland | Alternative investments |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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17.50%
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17.20%
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| Switzerland | Alternative investments | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
15.00%
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| Switzerland | Insurance |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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0.00%
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0.00%
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| Switzerland | Insurance | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
0.00%
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| International |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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100.00%
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100.00%
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| International | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
100.00%
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| International | Cash and cash equivalents |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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2.90%
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6.30%
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| International | Cash and cash equivalents | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
0.30%
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| International | Debt securities |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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92.90%
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90.50%
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| International | Debt securities | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
93.40%
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| International | Equity securities |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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2.60%
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2.00%
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| International | Equity securities | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
2.20%
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| International | Real estate |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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0.00%
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0.50%
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| International | Real estate | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
0.60%
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| International | Alternative investments |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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(0.70%)
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(1.10%)
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| International | Alternative investments | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
1.20%
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| International | Insurance |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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2.30%
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1.80%
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| International | Insurance | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
2.30%
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| Bank | International |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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100.00%
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100.00%
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| Bank | International | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
100.00%
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| Bank | International | Cash and cash equivalents |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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2.90%
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6.30%
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| Bank | International | Cash and cash equivalents | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
0.30%
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| Bank | International | Debt securities |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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92.90%
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90.50%
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| Bank | International | Debt securities | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
93.40%
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| Bank | International | Equity securities |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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2.60%
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2.00%
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| Bank | International | Equity securities | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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| Target weighted-average asset allocations (as a percent) |
2.20%
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| Bank | International | Real estate |
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| Defined benefit plan, Disclosure |
|
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| Weighted-average plan asset allocation (as a percent) |
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0.00%
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0.50%
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| Bank | International | Real estate | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
|
|
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| Target weighted-average asset allocations (as a percent) |
0.60%
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| Bank | International | Alternative investments |
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| Defined benefit plan, Disclosure |
|
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| Weighted-average plan asset allocation (as a percent) |
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(0.70%)
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(1.10%)
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| Bank | International | Alternative investments | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
|
|
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| Target weighted-average asset allocations (as a percent) |
1.20%
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| Bank | International | Insurance |
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| Defined benefit plan, Disclosure |
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| Weighted-average plan asset allocation (as a percent) |
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2.30%
|
1.80%
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| Bank | International | Insurance | Forecast/Estimate |
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| Target asset allocation next fiscal year (%) |
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|
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| Target weighted-average asset allocations (as a percent) |
2.30%
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