Debt Build-to-suit lease (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Sep. 30, 2012
Midwest salad production and warehousing facility [Member]
Debt Instrument [Line Items]
Build-to-suit asset in Property, plant and equipment, net		$ 16
Total build-to-suit lease construction costs	40
Midwest salad production and warehousing facility [Member]
Debt Instrument [Line Items]
Build-to-suit lease non-cash obligation included in Other liabilities		$ 16