Investments In And Advances To Affiliates (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) entity facility	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015 entity
Schedule Of Equity Method Investments [Line Items]
Amount of credit facility provided to unconsolidated affiliates	$ 90
Number of unconsolidated affiliates provided with credit facilities by the entity | entity	4
Number of credit facilities with outstanding balance | facility	3
Outstanding balance of credit facilities	$ 32
Wilmar International Limited [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	23.20%	23.20%	22.00%	20.00%	19.00%
Foreign Affiliate Traded On Active Market [Member]
Schedule Of Equity Method Investments [Line Items]
Carrying value of direct investments	$ 3,200
Market value of direct investments	$ 3,600
Almex [Member]
Schedule Of Equity Method Investments [Line Items]
Number of credit facilities with no outstanding balance | facility	1
Outstanding balance of credit facilities	$ 0
Minimum [Member]
Schedule Of Equity Method Investments [Line Items]
Credit facility, basis spread on floating interest rate	3.25%
Maximum [Member]
Schedule Of Equity Method Investments [Line Items]
Credit facility, basis spread on floating interest rate	3.75%
Equity Method Investments [Member]
Schedule Of Equity Method Investments [Line Items]
Number of unconsolidated affiliates | entity	59				58
Undistributed earnings of unconsolidated affiliates	$ 1,900