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Commitments and contingencies - Additional Information (Details)
Jun. 30, 2023
lawsuit
claim
Nov. 17, 2020
lawsuit
Commitments Disclosure [Line Items]    
Number of non-litigation claims | claim 1  
Number of lawsuits filed by groups of individual plaintiffs   12
Number of wrongful death lawsuits 1  
Mountain View Fire    
Commitments Disclosure [Line Items]    
Number of active lawsuits 17  
Number of lawsuits filed by insurance companies   4