Leases Leases - Future Minimum Rental Commitments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Leases [Abstract]
Noncancelable Operating Leases, Due 2013	$ 71.2
Noncancelable Operating Leases, Due 2014	63.0
Noncancelable Operating Leases, Due 2015	60.7
Noncancelable Operating Leases, Due 2016	55.5
Noncancelable Operating Leases, Due 2017	54.0
Noncancelable Operating Leases, Due Thereafter	1,320.3
Noncancelable Operating Leases, Total minimum rental commitments	$ 1,624.7