Goodwill And Other Intangible Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012 Customer And Contractual Relationships - Amortized [Member]	Jun. 30, 2012 Reacquired Rights - Amortized [Member]	Jun. 30, 2012 Routes Intangible Assets [Member]	Dec. 31, 2011 Routes Intangible Assets [Member]	Jun. 30, 2012 Goodwill [Member]	Dec. 31, 2011 Goodwill [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average useful life of intangible assets, years					17.6	8
Remaining amortization period of intangible assets			November 2029
Amortization expense related to intangibles	$ 1.2	$ 0.9	$ 2.4	$ 1.8
Estimated annual amortization expense, 2012			4.8
Estimated annual amortization expense, 2013			4.8
Estimated annual amortization expense, 2014			4.8
Estimated annual amortization expense, 2015			4.7
Estimated annual amortization expense, 2016			4.6
Assets held for sale							$ 10.7	$ 37.8	$ 4.6	$ 16.8