Accounting Policies - Schedule of Service Lives for Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2019
Structures | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, service life	10 years
Structures | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, service life	30 years
Revenue equipment | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, service life	10 years
Revenue equipment | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, service life	20 years
Technology equipment and software | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, service life	3 years
Technology equipment and software | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, service life	7 years
Other | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, service life	3 years
Other | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, service life	10 years