v2.4.0.6
Pension Plans (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
subsidiary
Fertilizer nutrients assets in Brazil
   
Pension Plans    
Plan settlement due to sale Brazilian fertilizer nutrient assets   42
Pension plans, defined benefit
   
Pension Plans    
Number of European subsidiaries transferring in assets and liabilities   1
Unrecognized initial net asset (obligation) 1  
Unrecognized prior service cost 7  
Unrecognized prior service cost, net of tax 5  
Unrecognized actuarial loss 171  
Unrecognized actuarial loss, net of tax 111  
Prior service cost (credit) included in accumulated other comprehensive income that is expected to be recognized in net periodic benefit costs in 2012 2  
Prior service cost (credit) included in accumulated other comprehensive income that is expected to be recognized in net periodic benefit costs in 2012, net of tax 1  
Net actuarial loss included in accumulated other comprehensive income that is expected to be recognized in net periodic benefit costs in 2012 12  
Net actuarial loss included in accumulated other comprehensive income that is expected to be recognized in net periodic benefit costs in 2012, net of tax $ 8