Employee Benefits - Additional Information (Details) - Defined Benefit Pension Plans - Nonqualified Plan $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($) Plan	Dec. 31, 2020 USD ($)
Yellow Plan
Defined Benefit Plan Disclosure [Line Items]
Settlement adjustment	$ 3.1	$ 3.4
Actual return on plan assets		46.0
Actuarial (gain) loss		15.1
Funded status	$ 23.8	$ 23.8	$ 5.6
Number of pension plans \| Plan		3
Roadway LLC Pension Plan and YRC Retirement Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Number of pension plans \| Plan		2

Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.

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Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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Amount of gain (loss) recognized in net periodic benefit (cost) credit from settlement and curtailment.

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Number of pension plans.

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