The following table summarizes Devon's other expenses (income) presented in the accompanying consolidated comprehensive statement of earnings.


	Three Months Ended March 31,
	2022			2021
Estimated future obligation under a performance guarantee	$	(96	)	$	—
Ukraine charitable pledge		20			—
Asset retirement obligation accretion		7			7
Severance and other non-income tax refunds		(3	)		(36	)
Other		11			—
Total	$	(61	)	$	(29	)

The first quarter of 2022 includes a $96 million benefit related to the revision of a future obligation under a performance guarantee liability for previously divested assets. Due to improved commodity prices and market conditions, the purchaser of these assets was able to fully satisfy the $35 million obligation due in the first quarter of 2022. Further, as of March 31, 2022, Devon also reduced the estimated future exposure of the performance guarantee by $61 million based on probability-weighted cash flows for the remainder of the contract term of four years.

The first quarter of 2022 also includes a $20 million pledge for humanitarian relief for the Ukrainian people and surrounding countries supporting refugees.