Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|
| Statement of changes in net assets available for benefits [abstract] | ||
| Reconciliation of changes in net assets available for benefits [abstract] | ||
| Changes in net assets available for benefits [abstract] | ||
| Other income |
1,400,000
USD
|
17,600,000
USD
|
| Other expense, by function |
1,200,000
USD
|
23,400,000
USD
|
| Tax expense (income) |
137,100,000
USD
|
44,500,000
USD
|