Significant Transactions - Kudu (Details) $ in Millions		12 Months Ended
	May 26, 2022 USD ($)	Dec. 31, 2021 USD ($)	May 25, 2022
Kudu
Other Significant Noncash Transactions [Line Items]
Basic ownership	89.30%		99.10%
Kudu
Other Significant Noncash Transactions [Line Items]
Pre-money valuation	1.3
Pre-money valuation, amount	$ 114.0
Enterprise value excluded		$ 54.3
Mass Mutual
Other Significant Noncash Transactions [Line Items]
Equity capital raised	64.1
White Mountains
Other Significant Noncash Transactions [Line Items]
Equity capital raised	50.0
Kudu
Other Significant Noncash Transactions [Line Items]
Equity capital raised	0.4
Kudu
Other Significant Noncash Transactions [Line Items]
Equity capital raised	$ 114.5