Note 4 - Long-term Debt - Long-term Debt Summary (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Long-term debt, gross	$ 5,808	$ 5,810
Less current portion	0	(2)
Long-term debt, less current portion and deferred financing costs	5,746	5,742
Revolving Credit Facility commitment	750	750
Undrawn outstanding letters of credit	(5)	(5)
Borrowing availability under Revolving Credit Facility	745	745
The 2028 Term Loan [Member]
Long-term debt, gross	739	739
The 2026 Term Loan [Member]
Long-term debt, gross	10	10
Notes 2029 [Member]
Long-term debt, gross	1,125	1,125
Unamortized deferred loan costs	(6)	(7)
2033 Notes [Member]
Long-term debt, gross	775	775
Notes 2032 [Member]
Long-term debt, gross	1,150	1,150
Unamortized deferred loan costs	(15)	(15)
Unamortized premium	5	5
2026 Notes [Member]
Long-term debt, gross	0	2
2030 Notes [Member]
Long-term debt, gross	790	790
Unamortized deferred loan costs	(10)	(10)
Notes 2031 [Member]
Long-term debt, gross	1,219	1,219
Unamortized deferred loan costs	(16)	(17)
Senior Credit Facility [Member]
Unamortized deferred loan costs	(12)	(13)
2027 Notes [Member]
Unamortized deferred loan costs	$ (8)	$ (9)