Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ (56,166)		$ (176,277)		$ (57,190)		$ (186,584)
Other comprehensive income (loss) before reclassifications	1,857		392,454		4,028		385,353
Amounts reclassified from accumulated other comprehensive income	(928)		36,753		(2,075)		54,161
Net current-period other comprehensive income (loss)	929		429,207		1,953		439,514
Spin-off of WhiteWave Foods			33,025				33,025
Ending Balance	(55,237)		285,955		(55,237)		285,955
Changes in Cash Flow Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	187		(38,003)		423		(58,452)
Other comprehensive income (loss) before reclassifications	(69)		(1,126)		(85)		(154)
Amounts reclassified from accumulated other comprehensive income	0		38,823	[1]	(220)	[2]	58,300
Net current-period other comprehensive income (loss)	(69)		37,697		(305)		58,146
Spin-off of WhiteWave Foods			182				182
Ending Balance	118		(124)		118		(124)
Pension and Other Postretirement Benefits Items
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(56,519)		(103,001)		(57,224)		(105,845)
Other comprehensive income (loss) before reclassifications	1,760		4,161		3,392		9,074
Amounts reclassified from accumulated other comprehensive income	(928)	[3]	(2,070)	[3]	(1,855)	[3]	(4,139)
Net current-period other comprehensive income (loss)	832		2,091		1,537		4,935
Spin-off of WhiteWave Foods			1,552				1,552
Ending Balance	(55,687)		(99,358)		(55,687)		(99,358)
Unrealized Gains/Losses on Available-For-Sale Securities
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			0				0
Other comprehensive income (loss) before reclassifications			385,552				385,552
Amounts reclassified from accumulated other comprehensive income			0				0
Net current-period other comprehensive income (loss)			385,552				385,552
Spin-off of WhiteWave Foods			0				0
Ending Balance			385,552				385,552
Foreign Currency Items
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	166		(35,273)		(389)		(22,287)
Other comprehensive income (loss) before reclassifications	166		3,867		721		(9,119)
Amounts reclassified from accumulated other comprehensive income	0		0		0		0
Net current-period other comprehensive income (loss)	166		3,867		721		(9,119)
Spin-off of WhiteWave Foods			31,291				31,291
Ending Balance	332		(115)		332		(115)
Non- controlling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			(5,732)				(3,683)
Other comprehensive income (loss) before reclassifications			668				(1,378)
Amounts reclassified from accumulated other comprehensive income			(3)				(6)
Net current-period other comprehensive income (loss)			665				(1,384)
Spin-off of WhiteWave Foods			5,067				5,067
Ending Balance			$ 0				$ 0

[1] Upon completion of the WhiteWave spin-off in May 2013, we determined that the underlying hedged forecasted transactions related to the novated swaps were no longer probable; therefore, during the three months ended June 30, 2013, we reclassified total losses of $63.4 million ($38.9 million, net of tax) recorded in accumulated other comprehensive income associated with these swaps to earnings, as a component of interest expense. See Note 6 for further information regarding our interest rate swaps.

[2] The accumulated other comprehensive loss component is related to the hedging activity amount at December 31, 2013 that was reclassified to operating income as we de-designated our cash flow hedges. See Note 6.

[3] The accumulated other comprehensive loss reclassification components are related to amortization of unrecognized actuarial losses and prior service costs, both of which are included in the computation of net periodic pension cost. See Note 10.