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Contingencies (Narrative) (Details) - item |  | 2 Months Ended
--- | --- | ---
Nov. 04, 2021 | Oct. 26, 2021
Violations of the federal securities laws [Member] |  |
Loss Contingencies [Line Items] |  |
Putative class action lawsuits |  | 4
Shareholder derivative actions [Member] |  |
Loss Contingencies [Line Items] |  |
Putative class action lawsuits | 4 |
Shareholder derivative actions U.S. District Court [Member] |  |
Loss Contingencies [Line Items] |  |
Putative class action lawsuits | 2 |
Shareholder derivative actions Texas Court [Member] |  |
Loss Contingencies [Line Items] |  |
Putative class action lawsuits | 1 |
Shareholder derivative actions Delware Court [Member] |  |
Loss Contingencies [Line Items] |  |
Putative class action lawsuits | 1 |

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