Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping

The carrying amounts and estimated fair values of the Company's financial assets and liabilities which were not recorded at fair value on the Consolidated Balance Sheets as of December 31, 2021 and 2020, were as follows (in millions):

As of December 31, 2021				Estimated Fair Value
Financial Assets	Carrying Amount			Level 1		Level 2		Level 3		Total
Cash and cash equivalents	$	39.1		$	39.1	$	—	$	—	$	39.1
Financial Liabilities
Long-term debt	$	3,334.0	(1)	$	—	$	3,631.5	$	—	$	3,631.5

(1) The carrying amount of long-term debt excludes a $5.3 million long-term finance lease obligation and

$4.8 million of unamortized debt issuance costs.

As of December 31, 2020				Estimated Fair Value
Financial Assets	Carrying Amount			Level 1		Level 2		Level 3		Total
Cash and cash equivalents	$	2.9		$	2.9	$	—	$	—	$	2.9
Financial Liabilities
Long-term debt	$	3,460.4	(1)	$	—	$	3,847.6	$	—	$	3,847.6

(1) The carrying amount of long-term debt excludes a $6.1 million long-term finance lease obligation and

$5.8 million of unamortized debt issuance costs.