Quarterly Financial Data (Narrative) (USD $)	3 Months Ended						12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Quarterly Financial Data [Abstract]
After-tax facility exit and other related costs		$ 222,000,000
After-tax facility exit and other related costs (per share)		0.33
After-tax restructuring and related cost, incurred cost	52,000,000
After-tax restructuring and related cost, cost incurred (per share)	0.08
After-tax start up costs for new greenfield plants			11,000,000	14,000,000	14,000,000	20,000,000
After-tax start up costs for new greenfield plants (in dollars per share)			$ 0.02	$ 0.02	$ 0.02	$ 0.03
Charges from debt buyback or exchange			15,000,000				12,000,000	15,000,000	75,000,000
After-tax charges from debt buyback or exchange			9,000,000
After-tax charges from debt buyback or exchange (per share)			0.01
Pre-tax gain on sale of bank securities of equity investee			78,000,000
After-tax gain on sale of bank securities of equity investee			49,000,000
After-tax gain on sale of bank securities of equity investee, per share (in dollars per share)			$ 0.07
Pre-tax gain related to the acquisition of the remaining interest in Golden Peanut					71,000,000			71,000,000
After-tax gain related to the acquisition of the remaining interest in Golden Peanut					44,000,000
After-tax gain related to the acquisition of the remaining interest in Golden Peanut, per share (in dollars per share)					$ 0.07
(Losses) gains on interest rate swap after tax				4,000,000	34,000,000	(19,000,000)
(Losses) gains on interest rate swap (in dollars per share)				$ 0.01	$ 0.05	$ (0.03)
After-tax increase to earnings due to adjustments to machinery and equipment assets			$ 28,000,000	$ 31,000,000	$ 24,000,000
After-tax increase to earnings due to adjustments to machinery and equipment assets (in dollars per share)			$ 0.04	$ 0.05	$ 0.04