2020 Plan. In order to align our projected operational requirements with reduced short and mid-term commercial aerospace demand as a result of the Coronavirus Disease 2019 (“COVID-19”) pandemic, we initiated a restructuring plan during the quarter ended June 30, 2020, which consisted primarily of reduction in force measures (“2020 Plan”).

Employee costs related to the 2020 Plan were included within Restructuring costs in our Statements of Consolidated Income and consisted of severance, voluntary buyout packages, outplacement services, estimated medical costs and associated payroll costs. Substantially all of the costs associated with the restructuring efforts initiated under the 2020 Plan were incurred and expensed as of December 31, 2020.

We have incurred total Restructuring costs of $6.8 million under the 2020 Plan through the quarter ended March 31, 2021. Cash payments associated with the restructuring plan are estimated to extend through 2022.

The following table summarizes the changes to our 2020 Plan liabilities during the quarter ended March 31, 2021 (in millions of dollars):

	Quarter Ended March 31, 2021
Balance as of December 31, 2020	$	1.4
Cash payments		(0.4	)
Other adjustments¹		(0.7	)
Balance as of March 31, 2021	$	0.3

In March 2021, we revised our production forecast for 2021, thereby reducing the estimated number of headcount reductions necessary as compared with our initial restructuring plan. As such, included in Other adjustments is a reduction to our estimated restructuring liability of $0.7 million with an offset to Restructuring costs to accommodate the revised headcount requirements.