CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 303	$ 347	$ 611	$ 618
Other comprehensive income (loss), pre-tax:
Foreign currency translation adjustments during period, pre-tax	228	(78)	309	(350)
Net investment hedges, pre-tax
Net investment hedge gain (loss), pre-tax	(230)	28	(327)	99
Cash flow hedges, pre-tax:
Net deferred gain (loss) on cash flow hedges, pre-tax		17		39
Reclassification to net income, pre-tax	(2)	1	(3)	3
Postretirement and postemployment benefit amounts arising during the period, pre-tax:
Prior service (credit) cost, pre-tax		0		1
Postretirement and postemployment benefits reclassification to net income, pre-tax:
Net experience (gain) loss		(1)		(1)
Prior service (credit) cost, pre-tax	(1)		0
Other comprehensive income (loss), pre-tax	(5)	(33)	(21)	(209)
Other comprehensive income (loss), tax (expense) benefit
Foreign currency translation adjustments during period, tax (expense) benefit	(1)	0	(1)	0
Net investment hedges, tax (expense) benefit
Net investment hedge gain (loss), tax (expense) benefit	59	(7)	83	(25)
Cash flow hedges, tax (expense) benefit:
Net deferred gain (loss) on cash flow hedges, tax (expense) benefit		(4)		(10)
Reclassification to net income, tax (expense) benefit	1	(1)	1	(1)
Postretirement and postemployment benefit amounts arising during the period, tax (expense) benefit:
Prior service (credit) cost, tax (expense) benefit		0		0
Postretirement and postemployment benefits reclassification to net income, tax (expense) benefit:
Net experience loss, tax (expense) benefit		0		0
Prior service cost, tax (expense) benefit	0		0
Other comprehensive income (loss), tax (expense) benefit	59	(12)	83	(36)
Other comprehensive income (loss), after tax:
Foreign currency translation adjustments during period, after-tax	227	(78)	308	(350)
Net investment hedges, after tax
Net investment hedge gain (loss), after-tax	(171)	21	(244)	74
Cash flow hedges, after tax
Net deferred gain (loss) on cash flow hedges		13		29
Reclassification to net income, after tax	(1)	0	(2)	2
Postretirement and postemployment benefit amounts arising during the period, after-tax:
Prior service (credit) cost, after-tax		0		1
Postretirement and postemployment benefits reclassification to net income, after-tax:
Net experience (gain) loss, after-tax		(1)		(1)
Prior service cost, after-tax	(1)		0
Other comprehensive income (loss)	54	(45)	62	(245)
Comprehensive income	357	302	673	373
Net income (loss) attributable to noncontrolling interests	4	3	8	7
Other comprehensive income (loss) attributable to noncontrolling interests	5	(8)	4	(78)
Comprehensive income attributable to Kellanova	$ 348	$ 307	$ 661	$ 444

KELLANOVA 10-Q