DEBT - Revolving Credit Facility (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) d Fiscalquarter Equitycureright	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Revolving credit facility borrowings	$ 0	$ 0
Letters of credit utilized	1,400,000,000	1,300,000,000
Revolving Credit Facility | $800 Million Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity on line of credit	1,000,000,000
Revolving Credit Facility | $1 Billion Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity on line of credit	$ 1,000,000,000	1,000,000,000
Maturity date	Mar. 11, 2027
Repayments of long-term debt	$ 100,000,000
Proceeds from issuance of long-term debt	100,000,000
Revolving credit facility borrowings	0	0
Unamortized debt issuance costs	2,000,000.0	2,900,000
Letters of credit utilized	52,900,000	61,200,000
Availability under revolving credit facility	$ 947,100,000	938,800,000
Maximum capitalization ratio	60.00%
Minimum consolidated tangible net worth requirement	$ 3,800,000,000
Debt instrument, covenant in effect, number of days outstanding for loans | d	5
Undrawn letters of credit covenant	$ 40,000,000.0
Maximum consecutive days for financial covenant	5 days
Number of consecutive fiscal quarters in which equity cure right can be used twice (in fiscal quarter) | Fiscalquarter	4
Maximum number of times company can use equity cure right | Equitycureright	5
Revolving Credit Facility | $100 Million Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity on line of credit	$ 100,000,000	$ 100,000,000
Maturity date	Sep. 17, 2024