Basis of Presentation - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Revenue from External Customer [Line Items]
Operating Revenue	$ 1,158.6	$ 1,260.4
LTL revenue
Revenue from External Customer [Line Items]
Operating Revenue	1,055.0	1,129.6
Other revenue
Revenue from External Customer [Line Items]
Operating Revenue	$ 103.6	$ 130.8

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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+ Details