Discontinued Operations (North American Operations) (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended		6 Months Ended		0 Months Ended			3 Months Ended	6 Months Ended	0 Months Ended	6 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended			0 Months Ended
	Oct. 24, 2011	Dec. 31, 2011	Jan. 01, 2011	Dec. 31, 2011	Jan. 01, 2011	Nov. 04, 2011 North American Fresh Bakery [Member]	Oct. 21, 2011 North American Fresh Bakery [Member]	Nov. 09, 2010 North American Fresh Bakery [Member]	Dec. 31, 2011 North American Fresh Bakery [Member]	Dec. 31, 2011 North American Fresh Bakery [Member]	Aug. 09, 2011 North American Refrigerated Dough [Member]	Dec. 31, 2011 North American Refrigerated Dough [Member]	Oct. 24, 2011 North American Foodservice Beverage [Member]	Dec. 31, 2011 North American Foodservice Beverage [Member]	Dec. 31, 2011 North American Foodservice Beverage [Member]	Dec. 31, 2011 Defined Benefit Pension Plans [Member] North American Fresh Bakery [Member]	Dec. 31, 2011 Postretirement Benefit Plans [Member] North American Fresh Bakery [Member]	Jan. 03, 2012 Discontinued Operation or Asset Disposal [Member] North American Foodservice Beverage [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pretax impairment charge recognized														$ 6
Discontinued operations, sales price per signed agreement								959			545		350
Settlement (gain) loss																34	(71)
Curtailment gain																	44
Pretax gain on sale		540	886	802	1,141				105	105		198		222	222
Debt of disposal group to be assumed								34
Reduced business purchase price							709
Proceeds from disposition of business						717.0						552.0						376.0
Partnership collaboration on liquid coffee innovation (in years)	10
Estimated future liquid coffee innovation royalties	$ 50