v2.4.0.6
Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2011
Commitments and Contingencies [Abstract]  
Future minimum lease obligations under non-cancellable operating leases

Future minimum lease obligations under non-cancelable operating leases with initial terms in excess of one year at December 31, 2011 are as follows:

 

         

2012

  $ 28.4  

2013

    24.8  

2014

    18.5  

2015

    15.3  

2016

    13.5  

Thereafter

    61.0  
   

 

 

 
    $ 161.5  
   

 

 

 
Future minimum payments under unconditional purchase commitments

Future minimum payments under unconditional purchase commitments, consisting primarily of (i) disposal related agreements which include fixed or minimum royalty payments, host agreements, and take-or-pay and put-or-pay agreements, and (ii) other obligations including committed capital expenditures and consulting service agreements at December 31, 2011 are as follows:

 

         

2012

  $ 196.8  

2013

    80.0  

2014

    68.1  

2015

    31.7  

2016

    25.3  

Thereafter

    242.4  
   

 

 

 
    $ 644.3  
   

 

 

 
Financial instruments and collateral in place

We had the following financial instruments and collateral in place to secure our financial assurances at December 31:

 

                 
    2011     2010  

Letters of credit

  $ 978.2     $ 1,077.0  

Surety bonds

    2,728.2       2,622.3  
Restricted Cash and Marketable Securities

The following table summarizes our restricted cash and marketable securities as of December 31:

 

                 
    2011     2010  

Financing proceeds

  $ 22.5     $ 39.8  

Capping, closure and post-closure obligations

    54.9       61.8  

Self-insurance

    75.2       63.8  

Other

    37.0       7.4  
   

 

 

   

 

 

 

Total restricted cash and marketable securities

  $       189.6     $       172.8