Note 1 - Basis of Presentation - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Items included in accumulated other comprehensive loss:
Adjustment to pension liability	$ (8)	$ (8)
Adjustment to fair value of interest rate caps	(32)	(31)
Income tax benefit	(9)	(9)
Accumulated other comprehensive loss	$ (31)	$ (30)

Amount, after tax, of accumulated increase (decrease) in equity from transaction and other event and circumstance from nonowner source.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant