Subsequent Events - Additional information (Detail) $ / shares in Units, truck in Thousands, trailer in Thousands, tractor in Thousands, independent_carrier in Thousands, employee in Thousands, customer in Thousands, m² in Millions, ft² in Millions				9 Months Ended
	Oct. 31, 2015 ft² employee Location country customer independent_carrier truck trailer tractor	Oct. 30, 2015 USD ($) $ / shares	Sep. 09, 2015 USD ($) employee Location customer $ / shares shares	Sep. 30, 2015 employee Location	Sep. 30, 2015 country	Sep. 30, 2015 USD ($)	Sep. 30, 2015 customer	Sep. 30, 2015 m²	Sep. 30, 2015 ft²	Sep. 30, 2015	Sep. 30, 2015 $ / shares	Sep. 08, 2015 $ / shares	Dec. 31, 2014 $ / shares
Subsequent Event [Line Items]
Number of locations where the entity operates | Location				900
Number of employees | employee				56
Number of customers (over) | customer							30
Common stock, par value (in usd per share) | $ / shares											$ 0.001	$ 0.001	$ 0.001
Number of countries in which entity operates | country					27
Area of Real Estate Property (in sqft)								12.1	129
Con-Way
Subsequent Event [Line Items]
Number of locations where the entity operates | Location			582
Number of employees | employee			30
Number of customers (over) | customer			36
Common stock, par value (in usd per share) | $ / shares			$ 0.625
Common stock price per share (in usd per share) | $ / shares			$ 47.60
Number of shares acquired that were validly tendered and not properly withdrawn | shares			46,150,072
Percentage of shares validly tendered and not properly withdrawn acquired			81.10%
Number of shares with guaranteed delivery | shares			1,793,225
Percentage of common stock acquired			3.20%
Total consideration paid			$ 3,000,000,000
Subsequent Event
Subsequent Event [Line Items]
Number of locations where the entity operates | Location	1,469
Number of employees | employee	84
Number of customers (over) | customer	50
Number of countries in which entity operates | country	32
Area of Real Estate Property (in sqft) | ft²	151
Number of Owned Tractors | tractor	19
Number of Owned Trailers | trailer	46
Number of Trucks | truck	10
Number of Accessible Independent Carriers (more than) | independent_carrier	50
Subsequent Event | Con-Way
Subsequent Event [Line Items]
Common stock price per share (in usd per share) | $ / shares		$ 47.60
ABL Facility | Subsequent Event
Subsequent Event [Line Items]
Secured revolving loan credit agreement amount		$ 1,000,000,000.0
Maximum capacity available for issuance of letters of credit		350,000,000
Capacity Available for Swing Line Loans		$ 50,000,000
Multi Currency Revolving Credit Facility
Subsequent Event [Line Items]
Secured revolving loan credit agreement amount						$ 415,000,000.0
Multi Currency Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Increase (Decrease) in margin (as a percent)		(0.25%)
Term Loan Facility | Subsequent Event
Subsequent Event [Line Items]
Secured revolving loan credit agreement amount		$ 1,600,000,000
Percentage of principal to be repaid each quarter		0.25%
Prepayment as percentage of excess cash flow		50.00%
Term Loan Facility, Scenario 1 | Subsequent Event
Subsequent Event [Line Items]
Prepayment as percentage of excess cash flow		25.00%
Term Loan Facility, Scenario 2 | Subsequent Event
Subsequent Event [Line Items]
Prepayment as percentage of excess cash flow		0.00%
Minimum | Term Loan Facility, Scenario 1 | Subsequent Event
Subsequent Event [Line Items]
Leverage ratio required		2.50
Maximum
Subsequent Event [Line Items]
Fixed Charge Coverage Ratio										1.00
Maximum | Term Loan Facility, Scenario 1 | Subsequent Event
Subsequent Event [Line Items]
Leverage ratio required		3.00
Maximum | Term Loan Facility, Scenario 2 | Subsequent Event
Subsequent Event [Line Items]
Leverage ratio required		2.50
LIBOR | Term Loan Facility | Subsequent Event
Subsequent Event [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate		4.50%
LIBOR | Minimum | ABL Facility | Subsequent Event
Subsequent Event [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate		1.50%
LIBOR | Minimum | Multi Currency Revolving Credit Facility
Subsequent Event [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate				1.75%
LIBOR | Maximum | ABL Facility | Subsequent Event
Subsequent Event [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate		2.00%
LIBOR | Maximum | Multi Currency Revolving Credit Facility
Subsequent Event [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate				2.25%
Base Rate | Term Loan Facility
Subsequent Event [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate				3.50%
Base Rate | Minimum | ABL Facility | Subsequent Event
Subsequent Event [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate		0.50%
Base Rate | Minimum | Multi Currency Revolving Credit Facility
Subsequent Event [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate				0.75%
Base Rate | Maximum | ABL Facility | Subsequent Event
Subsequent Event [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate		1.00%
Base Rate | Maximum | Multi Currency Revolving Credit Facility
Subsequent Event [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate				1.25%