Significant Accounting Policies - Additional Information (Detail)	3 Months Ended								12 Months Ended
	Dec. 28, 2019 USD ($) $ / shares	Sep. 28, 2019 USD ($)	Jun. 29, 2019 USD ($)	Mar. 30, 2019 USD ($)	Dec. 29, 2018 USD ($)	Sep. 29, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 29, 2019 Segment	Dec. 28, 2019 USD ($) $ / shares shares	Dec. 29, 2018 USD ($) shares	Dec. 30, 2017 USD ($) shares
Significant Accounting Policies [Line Items]
Number of reporting units | Segment									2
Stock options excluded from calculation of diluted earnings per share, antidilutive | shares										0	0	0
Dividends payable per share | $ / shares	$ 2.00									$ 2.00
Dividend payable date										Jan. 24, 2020
Dividend record date										Jan. 10, 2020
Dividends payable	$ 78,947,000									$ 78,947,000
Dividend announced date										Dec. 10, 2019
Revenue	994,879,000	$ 1,011,658,000	$ 1,045,040,000	$ 1,033,000,000	$ 1,182,351,000	$ 1,202,081,000	$ 1,182,786,000	$ 1,047,926,000		$ 4,084,577,000	$ 4,615,144,000	$ 3,646,364,000
BCO Independent Contractor
Significant Accounting Policies [Line Items]
Consolidated revenue, percentage										45.00%	43.00%	45.00%
Truck Brokerage Carriers
Significant Accounting Policies [Line Items]
Consolidated revenue, percentage										47.00%	49.00%	48.00%
Railroads
Significant Accounting Policies [Line Items]
Consolidated revenue, percentage										3.00%	3.00%	3.00%
Air and Ocean Cargo Carriers
Significant Accounting Policies [Line Items]
Consolidated revenue, percentage										3.00%	3.00%	3.00%
BCO Independent Contractor and Truck Brokerage Carriers | Van Equipment
Significant Accounting Policies [Line Items]
Revenue										$ 2,371,188,000	$ 2,791,494,000	$ 2,163,832,000
BCO Independent Contractor and Truck Brokerage Carriers | Unsided/Platform Equipment
Significant Accounting Policies [Line Items]
Revenue										1,295,817,000	1,386,387,000	1,134,660,000
BCO Independent Contractor and Truck Brokerage Carriers | Less than Truckload
Significant Accounting Policies [Line Items]
Revenue										$ 98,324,000	102,531,000	$ 89,041,000
Accounting Standards Update 2014-09 | Retained Earnings
Significant Accounting Policies [Line Items]
Cumulative adjustment to retained earnings					$ 773,000						$ 773,000
Buildings And Improvements
Significant Accounting Policies [Line Items]
Depreciated life										30 years
Trailing Equipment | Maximum
Significant Accounting Policies [Line Items]
Depreciated life										10 years
Trailing Equipment | Minimum
Significant Accounting Policies [Line Items]
Depreciated life										7 years
Hardware And Software | Maximum
Significant Accounting Policies [Line Items]
Depreciated life										7 years
Hardware And Software | Minimum
Significant Accounting Policies [Line Items]
Depreciated life										3 years
Commercial Trucking Claims
Significant Accounting Policies [Line Items]
Company retained aggregate liability	10,000,000									$ 10,000,000
Self insurance excess value maintain third party	5,000,000									5,000,000
Commercial Trucking Claims | Initial Excess Policy [Member]
Significant Accounting Policies [Line Items]
Company retained liability per claim	5,000,000									5,000,000
Company retained aggregate liability	10,000,000									10,000,000
Additional premium	3,500,000									3,500,000
Commercial Trucking Claims | Third Party Insurance [Member]
Significant Accounting Policies [Line Items]
Self insurance excess value maintain third party	10,000,000									10,000,000
Commercial Trucking Claims | Additional Retained Liability For Claims Three [Member]
Significant Accounting Policies [Line Items]
Company retained liability per claim	5,000,000									5,000,000
Additional premium	3,500,000									3,500,000
Commercial Trucking Claims | Maximum
Significant Accounting Policies [Line Items]
Company retained liability per claim	10,000,000									10,000,000
Commercial Trucking Claims | Maximum | Initial Excess Policy [Member]
Significant Accounting Policies [Line Items]
Company retained aggregate liability	10,000,000									10,000,000
Commercial Trucking Claims | Maximum | Additional Retained Liability, Maximum in Aggregate, for three year policy that goes May 1, 2019 through April 30, 2022
Significant Accounting Policies [Line Items]
Company retained term aggregate	15,000,000									15,000,000
Commercial Trucking Claims | Minimum
Significant Accounting Policies [Line Items]
Company retained liability per claim	5,000,000									5,000,000
Commercial Trucking Claims | Minimum | Initial Excess Policy [Member]
Significant Accounting Policies [Line Items]
Company retained aggregate liability	5,000,000									5,000,000
Commercial Trucking Claims | Minimum | Third Party Insurance [Member]
Significant Accounting Policies [Line Items]
Company retained liability per claim	5,000,000									5,000,000
General Liability Claim
Significant Accounting Policies [Line Items]
Company retained liability per claim	1,000,000									1,000,000
Workers' Compensation Claim
Significant Accounting Policies [Line Items]
Company retained liability per claim	250,000									250,000
Workers' Compensation Claim | BCO Independent Contractor
Significant Accounting Policies [Line Items]
Company retained liability per claim	750,000									750,000
Cargo Claim
Significant Accounting Policies [Line Items]
Company retained liability per claim	250,000									250,000
Occupational Reinsurance Claims One [Member] | BCO Independent Contractor
Significant Accounting Policies [Line Items]
Company retained liability per claim	500,000									500,000
Occupational Reinsurance Claims Two [Member] | BCO Independent Contractor
Significant Accounting Policies [Line Items]
Company retained liability per claim	1,000,000									1,000,000
Occupational Reinsurance Claims Three [Member] | BCO Independent Contractor
Significant Accounting Policies [Line Items]
Company retained liability per claim	$ 2,000,000									$ 2,000,000