The fair value as of the measurement date, net book value as of the end of the year and related impairment charge for assets measured at fair value on a nonrecurring basis subsequent to initial recognition during the years ended December 31, 2020, 2019 and 2018 were as follows:

	Year Ended December 31, 2020				As of December 31, 2020
	Impairment Charge		Fair Value Measurement (Level 3)		Net Book Value
Long-lived assets	$	4.5	$	—	$	—
Other intangible assets		0.7		—		—
Total	$	5.2	$	—	$	—

	Year Ended December 31, 2019				As of December 31, 2019
	Impairment Charge		Fair Value Measurement (Level 3)		Net Book Value
Long-lived assets	$	0.6	$	—	$	—
Other intangible assets		0.2		—		—
Total	$	0.8	$	—	$	—

	Year Ended December 31, 2018				As of December 31, 2018
	Impairment Charge		Fair Value Measurement (Level 3)		Net Book Value
Long-lived assets	$	13.7	$	—	$	—
Other intangible assets		0.2		—		—
Total	$	13.9	$	—	$	—