Discontinued Operations (Details) (USD $)	3 Months Ended		9 Months Ended			3 Months Ended						9 Months Ended		1 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011	Jun. 30, 2011	Mar. 31, 2012 Snacks Business Segment [Member]	Dec. 31, 2011 Snacks Business Segment [Member]	Sep. 30, 2011 Snacks Business Segment [Member]	Mar. 31, 2011 Snacks Business Segment [Member]	Dec. 31, 2010 Snacks Business Segment [Member]	Sep. 30, 2010 Snacks Business Segment [Member]	Mar. 31, 2012 Snacks Business Segment [Member]	Mar. 31, 2011 Snacks Business Segment [Member]	Feb. 29, 2012 The Kellogg Company [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disontinued Operations, Agreed Upon Sale Price														$ 2,700,000,000
Disposal Group, Not Discontinued Operation, Income Statement Disclosures [Abstract]
Net sales						350,000,000	391,000,000	387,000,000	337,000,000	371,000,000	338,000,000	1,128,000,000	1,046,000,000
Earnings from discontinued operations before income taxes						56,000,000	59,000,000	84,000,000	67,000,000	73,000,000	77,000,000	199,000,000	217,000,000
Income tax expense						22,000,000	18,000,000	26,000,000	20,000,000	17,000,000	22,000,000	66,000,000	59,000,000
Net earnings from discontinued operations	34,000,000	47,000,000	133,000,000	158,000,000		34,000,000	41,000,000	58,000,000	47,000,000	56,000,000	55,000,000	133,000,000	158,000,000
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Accounts receivable						119,000,000						119,000,000
Inventories						122,000,000						122,000,000
Prepaid expenses and other assets						7,000,000						7,000,000
Property, plant and equipment, net						354,000,000						354,000,000
Goodwill						95,000,000						95,000,000
Total assets held for sale						697,000,000						697,000,000
Accrued and other liabilities						55,000,000						55,000,000
Total liabilities held for sale						55,000,000						55,000,000
Assets held for sale, net	$ 642,000,000		$ 642,000,000		$ 0	$ 642,000,000						$ 642,000,000