Segment, Geographic and Customer Information - Net Revenue from External Customers (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue from External Customer [Line Items]
Revenues	$ 1,934,997	$ 1,937,620	$ 1,926,722	$ 1,995,686	$ 2,018,009	$ 1,964,601	$ 1,848,788	$ 1,878,828	$ 7,795,025	$ 7,710,226	$ 8,121,661
Fluid milk
Revenue from External Customer [Line Items]
Revenues									5,316,000	5,339,000	5,728,000
Ice cream
Revenue from External Customer [Line Items]
Revenues									1,108,000	1,041,000	965,000
Fresh cream
Revenue from External Customer [Line Items]
Revenues									389,000	359,000	358,000
ESL and other diary products
Revenue from External Customer [Line Items]
Revenues									196,000	231,000	250,000
Cultured
Revenue from External Customer [Line Items]
Revenues									282,000	299,000	319,000
Other beverages
Revenue from External Customer [Line Items]
Revenues									291,000	308,000	343,000
Other
Revenue from External Customer [Line Items]
Revenues									$ 213,000	$ 133,000	$ 159,000