Discontinued Operations and Divestitures - Transaction Expenses Included in Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Transaction expenses in discontinued operations	$ 12,901	$ 41,710
Whitewave
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Transaction expenses in discontinued operations	12,464	18,835
Morningstar
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Transaction expenses in discontinued operations	$ 437	$ 22,875