White Wave Spin-Off Transaction and Disposition of Remaining Ownership of White Wave Common Stock (Detail) $ / shares in Units, $ in Thousands				1 Months Ended	3 Months Ended	12 Months Ended
	Jul. 25, 2013 term_loan $ / shares shares	May. 23, 2013 USD ($) shares	Oct. 31, 2012 USD ($) $ / shares shares	May. 23, 2013 shares	Sep. 30, 2013 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Initial Public Offering [Line Items]
Spin-Off of The WhiteWave Foods Company								$ (699,026)
Gain on sale of investment						$ 0	$ 0	415,783
Additional Paid-in Capital
Initial Public Offering [Line Items]
Spin-Off of The WhiteWave Foods Company								$ (617,082)
WhiteWave Foods
Initial Public Offering [Line Items]
Increase in equity portion attributable to noncontrolling interest			$ 98,100
Increase in additional paid in capital			265,000
Reduction in accumulated other comprehensive loss			$ 4,500
Economic Interest of percentage outstanding shares			86.70%
Percentage of share owned			98.50%
WhiteWave Foods | Common Class A
Initial Public Offering [Line Items]
Common stock sold (in shares) | shares			23,000,000
Common stock at a price (in dollars per share) | $ / shares			$ 17
Economic Interest of percentage outstanding shares		19.90%		19.90%
Number of common shares distributed as dividend (in shares) | shares		47,686,000
Number of shares distributed per share | shares		0.25544448		0.25544448
Common stock shares outstanding to be retained (in shares) | shares		34,400,000		34,400,000
Number of share for public offering (in shares) | shares	34,400,000.0
Number of share for public offering price per share (in dollars per share) | $ / shares	$ 17.75
Number of satisfied term loans in exchange for common stock (in loans) | term_loan	2
Cash proceeds from debt-for-equity exchange					$ 589,200
Gain on sale of investment					415,800
Unrealized holding gains					$ 385,600
WhiteWave Foods | Common Class A | Additional Paid-in Capital
Initial Public Offering [Line Items]
Spin-Off of The WhiteWave Foods Company		$ 617,100
WhiteWave Foods | Common Class B
Initial Public Offering [Line Items]
Number of common shares distributed as dividend (in shares) | shares		67,914,000
Number of shares distributed per share | shares		0.36380189		0.36380189