Debt (Details) - USD ($)		1 Months Ended
	Mar. 31, 2022	Mar. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Debt
Line of credit (current)			$ 300,000,000.0	$ 0
2022 Credit Agreement
Debt
Term of maturity date extension		1 year
Term of additional maturity date extension option	1 year
Proceeds from issuance of long-term debt	$ 800,000,000
Outstanding balance, long-term				$ 800,000,000
Outstanding balance, long-term and short-term, combined amount			800,000,000
Line of credit (current)			$ 300,000,000
First Unsecured Revolving Credit Facility
Debt
Borrowing capacity	1,200,000,000
Second Unsecured Revolving Credit Facility
Debt
Borrowing capacity	800,000,000
Increase in borrowing capacity	$ 500,000,000