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Contingencies and Commitments - Narrative (Detail)
9 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended 5 Months Ended
Sep. 30, 2013
USD ($)
Jun. 28, 2013
Marmon [Member]
USD ($)
Sep. 30, 2013
Marmon [Member]
Oct. 16, 2013
Marmon [Member]
IMI plc Beverage Dispensing and Merchandising Operations [Member]
Subsequent Event [Member]
USD ($)
Oct. 16, 2013
Marmon [Member]
IMI plc Beverage Dispensing and Merchandising Operations [Member]
Subsequent Event [Member]
EUR (€)
Apr. 29, 2013
IMC International Metalworking Companies B.V. [Member]
USD ($)
Sep. 30, 2013
IMC International Metalworking Companies B.V. [Member]
May 29, 2013
MidAmerican [Member]
NV Energy [Member]
USD ($)
Commitments and Contingencies [Line Items]                
Acquisition of noncontrolling interests outstanding, percentage   16.00%            
Payment to acquire noncontrolling interest   $ 238,000,000       $ 2,050,000,000    
Percentage of shares owned after stock transactions     91.70%       100.00%  
Reduction of shareholders' equity for purchase of noncontrolling interests 1,200,000,000              
Potential business acquisition, cash price per share               $ 23.75
Cash committed to be paid for a potential business acquisition       $ 1,100,000,000 € 690,000,000     $ 5,600,000,000