A summary of our restructuring charges for the year ended December 31, 2022 by major activity type is as follows (in millions):


	Facilities Consolidation (1)		Severance and Other Personnel Costs		Data Center Assets		Total
Cost of revenue	$	154	$	—	$	1,341	$	1,495
Research and development	1,311		408		—		1,719
Marketing and sales	404		234		—		638
General and administrative	426		333		—		759
Total	$	2,295	$	975	$	1,341	$	4,611

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(1)Facilities consolidation includes impairment charges and accelerated expenses related to certain operating lease ROU assets and leasehold improvements.

The following table is a summary of the changes in the severance and other personnel liabilities, included within accrued expenses and other current liabilities on the consolidated balance sheets, related to the workforce reduction (in millions):


Balance as of January 1, 2022	$	—
Severance and other personnel costs	975
Cash payments during the period	(203)
Balance as of December 31, 2022 (1)	$	772

(1)We expect the remaining severance and termination related liabilities to be substantially paid out in cash during the first half of 2023.