Equity (Tables)

12 Months Ended

Dec. 29, 2018

Equity [Abstract]

Schedule of Earnings Per Share

(millions, except per share data)	Net income attributable to Kellogg Company		Average shares outstanding	Earnings per share
2018
Basic	$	1,336	347	$	3.85
Dilutive potential common shares			1	(0.02		)
Diluted	$	1,336	348	$	3.83
2017
Basic	$	1,254	348	$	3.61
Dilutive potential common shares			2	(0.03		)
Diluted	$	1,254	350	$	3.58
2016
Basic	$	699	350	$	1.99
Dilutive potential common shares			4	(0.02		)
Diluted	$	699	354	$	1.97

Changes in Comprehensive Income

	2018									2017								2016
	Pre-tax			Tax (expense)			After-tax			Pre-tax			Tax (expense)			After-tax		Pre-tax			Tax (expense)			After-tax
	amount			benefit			amount			amount			benefit			amount		amount			benefit			amount
Net income							$	1,344								$	1,254							$	700
Other comprehensive income:
Foreign currency translation adjustments	$	5		$	(53	)	(48		)	$	(34	)	$	113		$	79	$	(230	)	(24		)	(254		)
Cash flow hedges:
Unrealized gain (loss) on cash flow hedges	3			(1		)	2			—			—			—		(55		)	22			(33		)
Reclassification to net income	8			(2		)	6			9			(3		)	6		11			(6		)	5
Postretirement and postemployment benefits:
Amounts arising during the period:
Net experience gain (loss)	(8		)	1			(7		)	44			(12		)	32		25			(9		)	16
Prior service credit (cost)	1			—			1			—			—			—		(4		)	2			(2		)
Reclassification to net income:
Net experience (gain) loss	(5		)	1			(4		)	—			—			—		3			(1		)	2
Prior service (credit) cost	—			—			—			1			—			1		5			(1		)	4
Venezuela deconsolidation loss	—			—			—			—			—			—		63			—			63
Other comprehensive income (loss)	$	4		$	(54	)	$	(50	)	$	20		$	98		$	118	$	(182	)	$	(17	)	$	(199	)
Comprehensive income							$	1,294								$	1,372							$	501
Net income (loss) attributable to noncontrolling interests							8									—								1
Other comprehensive income (loss) attributable to noncontrolling interests							(7		)							—								—
Comprehensive income attributable to Kellogg Company							$	1,293								$	1,372							$	500

Reclassification out of AOCI

Details about AOCI Components	Amount reclassified from AOCI									Line item impacted within Income Statement
(millions)	2018			2017			2016
Gains and losses on cash flow hedges:
Foreign currency exchange contracts	$	—		$	(1	)	$	(14	)	COGS
Foreign currency exchange contracts	—			—			(1		)	SGA
Interest rate contracts	8			10			13			Interest expense
Commodity contracts	—			—			13			COGS
	$	8		$	9		$	11		Total before tax
	(2		)	(3		)	(6		)	Tax (expense) benefit
	$	6		$	6		$	5		Net of tax
Amortization of postretirement and postemployment benefits:
Net experience loss	$	(5	)	$	—		$	3		OIE
Prior service cost	—			1			5			OIE
	$	(5	)	$	1		$	8		Total before tax
	1			—			(2		)	Tax (expense) benefit
	$	(4	)	$	1		$	6		Net of tax
Venezuela deconsolidation loss	$	—		$	—		$	63		Other (income) expense
Total reclassifications	$	2		$	7		$	74		Net of tax

Summary of Accumulated Other Comprehensive Income (Loss)

(millions)	December 29, 2018			December 30, 2017
Foreign currency translation adjustments	$	(1,467	)	$	(1,426	)
Cash flow hedges — unrealized net gain (loss)	(53		)	(61		)
Postretirement and postemployment benefits:
Net experience gain (loss)	23			34
Prior service credit (cost)	(3		)	(4		)
Total accumulated other comprehensive income (loss)	$	(1,500	)	$	(1,457	)