The Company provides for the estimated costs to fulfill customer warranty obligations upon the recognition of the related revenue. While the Company engages in extensive product quality programs and processes, including actively monitoring and evaluating the quality of its component suppliers, the Company’s warranty obligations are affected by shipment volume, product failure rates, utilization levels, material usage and supplier warranties on parts delivered to the Company. Should actual product failure rates, utilization levels, material usage, or supplier warranties on parts differ from the Company’s estimates, revisions to the estimated warranty liability would be required.

	Six Months Ended June 30,
	2021			2020
Beginning of period	$	18.4		$	14.9
Provision for product warranties		22.3			13.0
Charges to warranty liability		(16.7	)		(12.2	)
End of period⁽¹⁾	$	24.0		$	15.7

⁽¹⁾

As of June 30, 2021, short-term product warranties of $20.6 and long-term product warranties of $3.4 were included within other current liabilities and other non-current liabilities, respectively, within the accompanying condensed consolidated balance sheet. As of June 30, 2020, short-term product warranties of $12.4 and long-term product warranties of $3.3 were included within other current liabilities and other non-current liabilities, respectively, within the accompanying condensed consolidated balance sheet.