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Debt and Letters of Credit - 2028 Notes (Details) - USD ($)	1 Months Ended	12 Months Ended
	Aug. 31, 2018	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Line of Credit Facility [Line Items]
Proceeds from issuance of 2029 Notes, net of issuance costs		$ 0	$ 0	$ 560,000,000
Repayments of debt		$ 37,000,000	57,000,000	$ 249,000,000
2029 Notes (1.125% Convertible Senior Notes)
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 600,000,000
Interest rate	4.25%
Proceeds from issuance of 2029 Notes, net of issuance costs	$ 595,000,000
2029 Notes (1.125% Convertible Senior Notes) | Prior to June 15, 2028
Line of Credit Facility [Line Items]
Redemption price (as a percent)		100.00%
Senior Notes Due 2018, 2016 and 2014
Line of Credit Facility [Line Items]
Redemption price (as a percent)		101.00%
2028 Notes (4.250% Senior Notes)
Line of Credit Facility [Line Items]
Interest rate		4.25%
Repayments of debt		$ 37,000,000	$ 57,000,000

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