Our Senior Notes are classified as Level Two due to the use and weighting of multiple market inputs in the final price of the security. We estimated the fair value of other debt instruments using a discounted cash flow analysis based on current market inputs for similar types of arrangements. We classified our other debt instruments and revolving credit facility, if applicable, as Level Three based on the lack of available market data. The primary sensitivity in these models is based on the selection of appropriate discount rates. Fluctuations in our assumptions will result in different estimates of fair value.


	September 30, 2024
	Carrying value		Fair value		Quoted prices in active markets for identical assets (Level One)		Significant other observable inputs (Level Two)		Significant unobservable inputs (Level Three)
Debt (1)	$	3,160	$	3,218	$	—	$	3,145	$	73


	December 31, 2023
	Carrying value		Fair value		Quoted prices in active markets for identical assets (Level One)		Significant other observable inputs (Level Two)		Significant unobservable inputs (Level Three)
Debt (2)	$	3,063	$	3,062	$	—	$	3,032	$	30

(2) Includes the 2024 Notes and excludes $6 million of finance lease obligations and $13 million of unamortized discounts and deferred financing fees.