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Earnings Per Share
 6 Months Ended
Jun. 30, 2011
Earnings Per Share [Abstract]  
Earnings Per Share
(8)   Earnings Per Share
 
Earnings per share of common stock outstanding were computed as follows:
 
                                 
    Three Months
 		    Three Months
 		    Six Months
 		    Six Months
 		 
    Ended
 		    Ended
 		    Ended
 		    Ended
 		 
    June 30,
 		    June 30,
 		    June 30,
 		    June 30,
 		 
    2011     2010     2011     2010  
    (Millions Except Share and Per Share Amounts)  
 
Basic earnings per share —
                               
Net income attributable to Tenneco Inc. 
  $ 50     $ 40     $ 97     $ 47  
                                 
Average shares of common stock outstanding
    59,980,866       59,142,946       59,901,929       59,033,416  
                                 
Earnings per average share of common stock
  $ 0.84     $ 0.68     $ 1.62     $ 0.79  
                                 
Diluted earnings per share —
                               
Net income attributable to Tenneco Inc. 
  $ 50     $ 40     $ 97     $ 47  
                                 
Average shares of common stock outstanding
    59,980,866       59,142,946       59,901,929       59,033,416  
Effect of dilutive securities:
                               
Restricted stock
    211,556       354,974       294,526       414,059  
Stock options
    1,621,052       1,501,109       1,716,882       1,445,492  
                                 
Average shares of common stock outstanding including dilutive securities
    61,813,474       60,999,029       61,913,337       60,892,967  
                                 
Earnings per average share of common stock
  $ 0.81     $ 0.66     $ 1.56     $ 0.77  
                                 
 
Options to purchase 200,360 and 1,393,879 shares of common stock were outstanding as of June 30, 2011 and 2010, respectively, but not included in the computation of diluted earnings per share respectively, because the options were anti-dilutive.