Investments (Tables)

12 Months Ended

Dec. 31, 2021

Investments, Debt and Equity Securities, Equity Method Investments and Joint Ventures [Abstract]

Equity Securities

The following table summarizes the measurement category, balance sheet location, and balances of our equity securities (in millions):

		Year Ended
Measurement Category	Balance Sheet Location	December 31, 2021		December 31, 2020
Fair value method	Prepaid expenses and other current assets	$	0.4	$	2.5
Fair value method(1)	Other non-current assets	$	1.8	$	1.9
Equity method	Other non-current assets	$	66.4	$	69.8

(1) Measured at fair value using the Net Asset Value practical expedient.

Equity security expense (income)

The following table summarizes the expense (income) recognized in earnings of our equity securities (in millions):

		Year Ended
Measurement Category	Income Statement Location	December 31, 2021		December 31, 2020		December 31, 2019
Fair value method	Other (income) expense, net	$	2.0	$	3.0	$	4.9
Equity method	Other (income) expense, net	$	1.1	$	(3.0)	$	(2.7)