Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Summary of Significant Accounting Policies

Schedule of allowance for doubtful accounts

	Balance at				Balance at
(Millions of dollars)	beginning of year		Provision(1)	Net deductions(2)	end of year
Allowance for Doubtful Accounts:
Year Ended December 31, 2018	$	29	7	(3)	$	33
Year Ended December 31, 2017	$	14	16	(1)	$	29
Year Ended December 31, 2016	$	21	(1)	(6)	$	14

(1)  During 2018, $7 million of the provision was charged to selling, general and administrative expenses. During 2017, $12 million of the provision was charged to selling, general and administrative expenses, $2 million to income from affiliates related to reserves on convertible notes and $2 million to cost of sales related to a rebate reserve.

(2)  Includes write-offs net of recoveries and foreign currency translation adjustments.

Schedule of allowance for notes receivable

	Balance at				Balance at
(Millions of dollars)	beginning of year		Provision	Net deductions	end of year
Allowance for Notes Receivable:
Year Ended December 31, 2018	$	16	1	—	$	17
Year Ended December 31, 2017	$	16	—	—	$	16
Year Ended December 31, 2016	$	—	16	—	$	16

Schedule of changes in the carrying amount of goodwill

		Pork		CT&M
(Millions of dollars)		Segment		Segment		Total
Balance as of December 31, 2016	$	18	$	1	$	19
Acquisition		—		3		3
Balance as of December 31, 2017		18		4		22
Acquisition		—		148		148
Foreign currency translation		—		(3)		(3)
Balance as of December 31, 2018	$	18	$	149	$	167

Schedule of changes in the asset retirement obligation

	Years ended December 31,
(Millions of dollars)	2018		2017
Beginning balance	$	22	$	19
Accretion expense		1		2
Liability for additional lagoons placed in service		—		1
Ending balance	$	23	$	22

Schedule of amounts paid for interest and income taxes

	Years ended December 31,
(Millions of dollars)	2018		2017		2016
Interest, net of interest capitalized	$	43	$	30	$	29
Income taxes, net of refunds		35		32		31