Discontinued Operations - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		1 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jan. 31, 2013 Morningstar	Jun. 30, 2013 Morningstar	Mar. 31, 2013 Morningstar	Jun. 30, 2013 Morningstar	Jun. 30, 2014 WhiteWave Foods transaction	Dec. 31, 2012 IPO [Member] WhiteWave Foods	Jun. 30, 2013 Spinoff [Member] WhiteWave Foods	Sep. 30, 2013 Equity Swap [Member] WhiteWave Foods
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Transactions Related To Spin-Off And Disposal									3
Sale of Stock, Percentage of Shares Offered										13.30%	66.80%	19.90%
Net cash proceed for full repayment of debt					$ 1,450,000,000
Net pre-tax gain related to divestiture							871,300,000
Gain (loss) on sale of discontinued operations, net of tax	318,000	(65,000)	1,154,000	491,820,000			492,100,000
Discontinued operations transaction costs	$ 0	$ 9,310,000	$ 0	$ 12,764,000		$ 300,000		$ 300,000