v2.4.0.6
Commitments and Contingencies Operating and Capital Leases (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Long-term Purchase Commitment      
Operating leases, rent expense $ 358,700,000 $ 325,100,000 $ 281,200,000
Operating leases, future minimum payments due 2012 339,765,000    
Operating leases, future minimum payments, due 2013 344,499,000    
Operating leases, future minimum payments, due 2014 342,965,000    
Operating leases, future minimum payments, due 2015 338,915,000    
Operating leases, future minimum payments, due 2016 317,936,000    
Operating leases, future minimum payments, due thereafter 918,659,000    
Operating leases, future minimum payments due 2,602,739,000    
Capital leases, future minimum payments due 2012 34,333,000    
Capital leases, future minimum payments due 2013 35,347,000    
Capital leases, future minimum payments due 2014 36,408,000    
Capital leases, future minimum payments due 2015 37,500,000    
Capital leases, future minimum payments due 2016 38,626,000    
Capital leases, future minimum payments due thereafter 338,588,000    
Capital leases, future minimum payments due 520,802,000    
Capital leases, future minimum payments, executory costs (239,635,000)    
Capital leases, future minimum payments, present value of net minimum payments 281,167,000    
Capital lease obligations, current (8,070,000)    
Capital lease obligations, noncurrent $ 273,097,000