- Definition

The increases or decreases in lease payments that result from changes occurring after the inception of the lease in the factors (other than the passage of time) on which lease payments are based, except that any escalation of minimum lease payments relating to increases in construction or acquisition cost of the leased property or for increases in some measure of cost or value during the construction or preconstruction period, are excluded from contingent rentals. Contingent rentals also may include amounts for which the triggering events have not yet occurred or the specified targets for which have not yet been achieved (such as sales based percentage rent), but which events are considered probable of occurring or which specified targets are considered probable of being achieved.

+ References+ Details

Commitment and Contingencies - Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]
Outstanding letters of credit and surety bonds	$ 78.3			$ 99.3
Related Party Transaction [Line Items]
Operating Leases, Future Minimum Payments Due	674.0
Operating Leases, Rent Expense	292.0us-gaap_LeaseAndRentalExpense	283.2us-gaap_LeaseAndRentalExpense	279.3us-gaap_LeaseAndRentalExpense
Operating Leases, Rent Expense, Contingent Rentals	35.7	28.6	24.7
CBS Corp.
Related Party Transaction [Line Items]
Indemnification of Letters of Credit and Surety Bonds	$ 78.3			$ 0