Fair Value (Tables)

6 Months Ended

Jun. 30, 2021

Fair Value Disclosures [Abstract]

Assets Measured on Recurring Basis

The table below sets forth the Company’s financial assets that are measured at fair value on a recurring, monthly basis in accordance with ASC 820.

		Fair Value
(in millions)	Level in Fair  Value Hierarchy	June 30, 2021		December 31, 2020
Equity investment in TuSimple (1)	1	$	25.2	$	—
Marketable securities (2)	2	49.1		47.1

(1)Our equity investment in TuSimple is classified as Level 1 in the fair value hierarchy as shares of TuSimple’s Class A common stock are traded on the NASDAQ. See Note 5, Investments, for additional information.

(2)Marketable securities are classified as Level 2 in the fair value hierarchy as they are valued based on quoted prices for similar assets in active markets or quoted prices for identical or similar assets in markets that are not active. See Note 5, Investments, for additional information.