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Comprehensive Income
6 Months Ended
Jun. 30, 2011
Comprehensive Income [Abstract]  
Comprehensive Income
 
6.   Comprehensive Income
 
Comprehensive income was as follows (in millions):
 
                                 
    Three Months
    Six Months
 
    Ended June 30,     Ended June 30,  
    2011     2010     2011     2010  
 
Consolidated net income
  $ 250     $ 258     $ 446     $ 450  
                                 
Other comprehensive income (loss), net of taxes:
                               
Unrealized losses resulting from changes in fair value of derivative instruments, net of taxes
    (8 )     (22 )     (13 )     (33 )
Realized (gains) losses on derivative instruments reclassified into earnings, net of taxes
    1       (9 )     9        
Unrealized gains (losses) on marketable securities, net of taxes
    1       (1 )     (1 )      
Foreign currency translation adjustments
    8       (37 )     36       (10 )
Change in funded status of post-retirement benefit obligations, net of taxes
          (1 )     (2 )     (1 )
                                 
Other comprehensive income (loss)
    2       (70 )     29       (44 )
                                 
Comprehensive income
    252       188       475       406  
Comprehensive income attributable to noncontrolling interests
    (13 )     (12 )     (23 )     (22 )
                                 
Comprehensive income attributable to Waste Management, Inc. 
  $ 239     $ 176     $ 452     $ 384  
                                 
 
The components of accumulated other comprehensive income, which is included as a component of Waste Management, Inc. stockholders’ equity, were as follows (in millions):
 
                 
    June 30,
    December 31,
 
    2011     2010  
 
Accumulated unrealized loss on derivative instruments, net of taxes
  $ (37 )   $ (33 )
Accumulated unrealized gain on marketable securities, net of taxes
    4       5  
Foreign currency translation adjustments
    297       261  
Funded status of post-retirement benefit obligations, net of taxes
    (5 )     (3 )
                 
    $ 259     $ 230