Prepaid Expenses and Other Assets

12 Months Ended

Dec. 31, 2021

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepaid Expenses and Other Assets

5. Prepaid Expenses and Other Assets

Prepaid expenses and other assets consist of the following:

	December 31, 2021		December 31, 2020
	(in millions)
Prepaid expenses and other assets	$	12.3	$	8.6
Unbilled accounts receivable		17.4		8.2
Total prepaid expenses and other assets	$	29.7	$	16.8