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Commitments and Contingencies Commitments and Contingencies (Guarantee Narative) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Customer Lines Of Credit For Brazilian Subsidiary
   
Guarantor Obligations [Line Items]    
Guarantor Obligations, Maximum Exposure, Undiscounted $ 485,000,000 $ 449,000,000
Loss associated with Brazilian subsidiary guarantee 0 0
Indebtedness And Lines of Credit For Various Consolidated Subsidiaries
   
Guarantor Obligations [Line Items]    
Guarantor Obligations, Maximum Exposure, Undiscounted 1,300,000,000 1,400,000,000
Harbor Shores Line of Credit
   
Guarantor Obligations [Line Items]    
Guarantor Obligations, Maximum Exposure, Undiscounted $ 50,000,000