Commitments and Contingencies (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Rental costs
Rent expense	$ 41.0	$ 44.3	$ 43.4
Letters of credit, outstanding	8.3	7.2
Unconsolidated real estate affiliates
Rental costs
Rent expense	$ 11.4	$ 7.1	$ 8.6
Minimum
Commitments and Contingencies
Lease term	1 year
Maximum
Commitments and Contingencies
Lease term	14 years