Summary of significant accounting policies (Details)
|
12 Months Ended |
|
Dec. 31, 2021
year
day
|
|---|
| Accounting Policies [Line Items] |
|
| Voting rights percentage threshold used to consolidate subsidiaries |
50.00%
|
| Equity method of accounting, low end of range of voting interest (as a percent) |
20.00%
|
| Equity method of accounting, high end of range of voting interest (as a percent) |
50.00%
|
| Real estate held for investment purposes, useful life, low end of range (in years) | year |
40
|
| Real estate held for investment purposes, useful life, high end of range (in years) | year |
67
|
| Actuarial gains and losses threshold over the PBO or market value of plan assets which is amortized (as a percent) |
10.00%
|
| Non-performing loan classification, past due (in days) |
90
|
| Non-performing loan classification subprime residential loans, past due (in days) |
120
|
| Non-performing subprime residential loans typical period for transferring servicing (in days) |
30
|
| Minimum |
|
| Accounting Policies [Line Items] |
|
| Equity method of accounting for limited partnership interests, threshold voting interest (as a percent) |
3.00%
|
| Maximum |
|
| Accounting Policies [Line Items] |
|
| Equity method of accounting for limited partnership interests, threshold voting interest (as a percent) |
5.00%
|