Leases (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Sale Leaseback Transaction [Line Items]
Description of Lessee Leasing Arrangements, Capital Leases	Under certain capital-lease agreements, Con-way guarantees the residual value of tractors at the end of the lease term. The stated amounts of the residual-value guarantees have been included in the minimum lease payments below.
Revenue equipment of capital leases	$ 68.9	$ 77.9
Accumulated depreciation of capital leases	39.0	33.3
Unamortized gain of sell and lease back	$ 9.3
Sale Leaseback Transaction, Expiration Year	2024