Quarterly Financial Data (Unaudited) Schedule of Condensed Consolidated Quarterly Statement of Income (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 29, 2018	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Jun. 30, 2018	Jul. 01, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Statements of Income
Net sales		$ 6,891	$ 6,383	$ 6,690	$ 6,304	$ 6,841	$ 6,279	$ 6,634	$ 6,322	$ 12,994	$ 12,956	$ 19,377	$ 19,235	$ 26,268	$ 26,076	$ 26,300
Cost of products sold		4,675	4,289	4,343	4,040	4,554	4,123	4,227	4,139	8,383	8,366	12,672	12,489	17,347	17,043	17,154
Gross profit		2,216	2,094	2,347	2,264	2,287	2,156	2,407	2,183	4,611	4,590	6,705	6,746	8,921	9,033	9,146
Selling, general and administrative expenses, excluding impairment losses		867	803	771	764	778	664	720	765	1,535	1,485	2,338	2,149	3,205	2,927	3,527
Goodwill impairment losses	$ 6,900	6,875	0	133	0	0	0	0	0	133	0	133	0	7,008	0	0
Intangible asset impairment losses		8,610	217	101	0	0	1	48	0	101	48	318	49	8,928	49	18
Selling, general and administrative expenses		16,352	1,020	1,005	764	778	665	768	765	1,769	1,533	2,789	2,198	19,141	2,976	3,545
Operating income/(loss)		(14,136)	1,074	1,342	1,500	1,509	1,491	1,639	1,418	2,842	3,057	3,916	4,548	(10,220)	6,057	5,601
Interest expense		325	326	316	317	308	306	307	313	633	620	959	926	1,284	1,234	1,134
Other expense/(income), net		13	(71)	(35)	(90)	(116)	(127)	(254)	(130)	(125)	(384)	(196)	(511)	(183)	(627)	(472)
Income/(loss) before income taxes		(14,474)	819	1,061	1,273	1,317	1,312	1,586	1,235	2,334	2,821	3,153	4,133	(11,321)	5,450	4,939
Provision for/(benefit from) income taxes		(1,846)	201	308	270	(6,665)	400	429	354	578	783	779	1,183	(1,067)	(5,482)	1,333
Net income/(loss)		(12,628)	618	753	1,003	7,982	912	1,157	881	1,756	2,038	2,374	2,950	(10,254)	10,932	3,606
Net income/(loss) attributable to noncontrolling interest		(60)	(1)	(1)	0	(7)	(1)	1	(2)	(1)	(1)	(2)	(2)	(62)	(9)	10
Net income/(loss) attributable to Kraft Heinz		(12,568)	619	754	1,003	7,989	913	1,156	883	1,757	2,039	2,376	2,952	(10,192)	10,941	3,596
Preferred dividends		0	0	0	0	0	0	0	0	0	0	0	0	0	0	180
Net income/(loss) attributable to common shareholders		$ (12,568)	$ 619	$ 754	$ 1,003	$ 7,989	$ 913	$ 1,156	$ 883	$ 1,757	$ 2,039	$ 2,376	$ 2,952	$ (10,192)	$ 10,941	$ 3,416
Basic earnings/(loss) per share (in dollars per share)		$ (10.30)	$ 0.51	$ 0.62	$ 0.82	$ 6.55	$ 0.75	$ 0.95	$ 0.73	$ 1.44	$ 1.67	$ 1.95	$ 2.42	$ (8.36)	$ 8.98	$ 2.81
Diluted earnings/(loss) per share (in dollars per share)		$ (10.30)	$ 0.50	$ 0.62	$ 0.82	$ 6.50	$ 0.74	$ 0.94	$ 0.72	$ 1.43	$ 1.66	$ 1.94	$ 2.40	$ (8.36)	$ 8.91	$ 2.78
As Previously Reported
Statements of Income
Net sales			$ 6,378	$ 6,686	$ 6,304	$ 6,877	$ 6,314	$ 6,677	$ 6,364	$ 12,990	$ 13,041	$ 19,368	$ 19,355		$ 26,232	$ 26,487
Cost of products sold			4,271	4,321	4,059	4,470	4,000	3,996	4,063	8,380	8,059	12,651	12,059		16,529	16,901
Gross profit			2,107	2,365	2,245	2,407	2,314	2,681	2,301	4,610	4,982	6,717	7,296		9,703	9,586
Selling, general and administrative expenses, excluding impairment losses			803	771	764	767	652	712	750	1,535	1,462	2,338	2,114		2,881	3,444
Goodwill impairment losses			0	164	0	0	0	0	0	164	0	164	0		0	0
Intangible asset impairment losses			234	101	0	0	1	48	0	101	48	335	49		49	0
Selling, general and administrative expenses			1,037	1,036	764	767	653	760	750	1,800	1,510	2,837	2,163		2,930	3,444
Operating income/(loss)			1,070	1,329	1,481	1,640	1,661	1,921	1,551	2,810	3,472	3,880	5,133		6,773	6,142
Interest expense			327	318	317	308	306	307	313	635	620	962	926		1,234	1,134
Other expense/(income), net			(71)	(35)	(90)	1	(4)	24	(12)	(125)	12	(196)	8		9	(15)
Income/(loss) before income taxes			814	1,046	1,254	1,331	1,359	1,590	1,250	2,300	2,840	3,114	4,199		5,530	5,023
Provision for/(benefit from) income taxes			186	291	261	(6,665)	416	430	359	552	789	738	1,205		(5,460)	1,381
Net income/(loss)			628	755	993	7,996	943	1,160	891	1,748	2,051	2,376	2,994		10,990	3,642
Net income/(loss) attributable to noncontrolling interest			(2)	(1)	0	(7)	(1)	1	(2)	(1)	(1)	(3)	(2)		(9)	10
Net income/(loss) attributable to Kraft Heinz			630	756	993	8,003	944	1,159	893	1,749	2,052	2,379	2,996		10,999	3,632
Preferred dividends			0	0	0	0	0	0	0	0	0	0	0		0	180
Net income/(loss) attributable to common shareholders			$ 630	$ 756	$ 993	$ 8,003	$ 944	$ 1,159	$ 893	$ 1,749	$ 2,052	$ 2,379	$ 2,996		$ 10,999	$ 3,452
Basic earnings/(loss) per share (in dollars per share)			$ 0.52	$ 0.62	$ 0.81	$ 6.57	$ 0.78	$ 0.95	$ 0.73	$ 1.43	$ 1.69	$ 1.95	$ 2.46		$ 9.03	$ 2.84
Diluted earnings/(loss) per share (in dollars per share)			$ 0.51	$ 0.62	$ 0.81	$ 6.52	$ 0.77	$ 0.94	$ 0.73	$ 1.43	$ 1.67	$ 1.94	$ 2.44		$ 8.95	$ 2.81
As Restated
Statements of Income
Net sales						$ 6,841	$ 6,279	$ 6,634	$ 6,322		$ 12,956		$ 19,235		$ 26,076	$ 26,300
Cost of products sold						4,452	4,014	3,981	4,038		8,019		12,033		16,485	16,785
Gross profit						2,389	2,265	2,653	2,284		4,937		7,202		9,591	9,515
Selling, general and administrative expenses, excluding impairment losses						763	650	688	748		1,436		2,086		2,849	3,439
Goodwill impairment losses						0	0	0	0		0		0		0	0
Intangible asset impairment losses						0	1	48	0		48		49		49	18
Selling, general and administrative expenses						763	651	736	748		1,484		2,135		2,898	3,457
Operating income/(loss)						1,626	1,614	1,917	1,536		3,453		5,067		6,693	6,058
Interest expense						308	306	307	313		620		926		1,234	1,134
Other expense/(income), net						1	(4)	24	(12)		12		8		9	(15)
Income/(loss) before income taxes						1,317	1,312	1,586	1,235		2,821		4,133		5,450	4,939
Provision for/(benefit from) income taxes						(6,665)	400	429	354		783		1,183		(5,482)	1,333
Net income/(loss)						7,982	912	1,157							10,932	3,606
Net income/(loss) attributable to noncontrolling interest						(7)	(1)	1	(2)		(1)		(2)		(9)	10
Net income/(loss) attributable to Kraft Heinz						7,989	913	1,156	883		2,039		2,952		10,941	3,596
Preferred dividends						0	0	0	0		0		0		0	180
Net income/(loss) attributable to common shareholders						$ 7,989	$ 913	$ 1,156	$ 883		$ 2,039		$ 2,952		$ 10,941	$ 3,416
Basic earnings/(loss) per share (in dollars per share)						$ 6.55	$ 0.75	$ 0.95	$ 0.73		$ 1.67		$ 2.42		$ 8.98	$ 2.81
Diluted earnings/(loss) per share (in dollars per share)						$ 6.50	$ 0.74	$ 0.94	$ 0.72		$ 1.66		$ 2.40		$ 8.91	$ 2.78
ASU Adoption Impacts
Statements of Income
Net sales						$ 0	$ 0	$ 0	$ 0		$ 0		$ 0		$ 0	$ 0
Cost of products sold						102	109	246	101		347		456		558	369
Gross profit						(102)	(109)	(246)	(101)		(347)		(456)		(558)	(369)
Selling, general and administrative expenses, excluding impairment losses						15	14	32	17		49		63		78	88
Goodwill impairment losses						0	0	0	0		0		0		0	0
Intangible asset impairment losses						0	0	0	0		0		0		0	0
Selling, general and administrative expenses						15	14	32	17		49		63		78	88
Operating income/(loss)						(117)	(123)	(278)	(118)		(396)		(519)		(636)	(457)
Interest expense						0	0	0	0		0		0		0	0
Other expense/(income), net						(117)	(123)	(278)	(118)		(396)		(519)		(636)	(457)
Income/(loss) before income taxes						0	0	0	0		0		0		0	0
Provision for/(benefit from) income taxes						0	0	0	0		0		0		0	0
Net income/(loss)						0	0	0	0		0		0		0	0
Net income/(loss) attributable to noncontrolling interest						0	0	0	0		0		0		0	0
Net income/(loss) attributable to Kraft Heinz						0	0	0	0		0		0		0	0
Preferred dividends						0	0	0	0		0		0		0	0
Net income/(loss) attributable to common shareholders						$ 0	$ 0	$ 0	$ 0		$ 0		$ 0		$ 0	$ 0
Basic earnings/(loss) per share (in dollars per share)						$ 0.00	$ 0.00	$ 0.00	$ 0.00		$ 0.00		$ 0.00		$ 0.00	$ 0.00
Diluted earnings/(loss) per share (in dollars per share)						$ 0.00	$ 0.00	$ 0.00	$ 0.00		$ 0.00		$ 0.00		$ 0.00	$ 0.00
Restatement | Restatement Impacts
Statements of Income
Net sales			$ 5	$ 4	$ 0	$ (36)	$ (35)	$ (43)	$ (42)	$ 4	$ (85)	$ 9	$ (120)		$ (156)	$ (187)
Cost of products sold			18	22	(19)	(18)	14	(15)	(25)	3	(40)	21	(26)		(44)	(116)
Gross profit			(13)	(18)	19	(18)	(49)	(28)	(17)	1	(45)	(12)	(94)		(112)	(71)
Selling, general and administrative expenses, excluding impairment losses			0	0	0	(4)	(2)	(24)	(2)	0	(26)	0	(28)		(32)	(5)
Goodwill impairment losses			0	(31)	0	0	0	0	0	(31)	0	(31)	0		0	0
Intangible asset impairment losses			(17)	0	0	0	0	0	0	0	0	(17)	0		0	18
Selling, general and administrative expenses			(17)	(31)	0	(4)	(2)	(24)	(2)	(31)	(26)	(48)	(28)		(32)	13
Operating income/(loss)			4	13	19	(14)	(47)	(4)	(15)	32	(19)	36	(66)		(80)	(84)
Interest expense			(1)	(2)	0	0	0	0	0	(2)	0	(3)	0		0	0
Other expense/(income), net			0	0	0	0	0	0	0	0	0	0	0		0	0
Income/(loss) before income taxes			5	15	19	(14)	(47)	(4)	(15)	34	(19)	39	(66)		(80)	(84)
Provision for/(benefit from) income taxes			15	17	9	0	(16)	(1)	(5)	26	(6)	41	(22)		(22)	(48)
Net income/(loss)			(10)	(2)	10	(14)	(31)	(3)	(10)	8	(13)	(2)	(44)		(58)	(36)
Net income/(loss) attributable to noncontrolling interest			1	0	0	0	0	0	0	0	0	1	0		0	0
Net income/(loss) attributable to Kraft Heinz			(11)	(2)	10	(14)	(31)	(3)	(10)	8	(13)	(3)	(44)		(58)	(36)
Preferred dividends			0	0	0	0	0	0	0	0	0	0	0		0	0
Net income/(loss) attributable to common shareholders			$ (11)	$ (2)	$ 10	$ (14)	$ (31)	$ (3)	$ (10)	$ 8	$ (13)	$ (3)	$ (44)		$ (58)	$ (36)
Basic earnings/(loss) per share (in dollars per share)			$ (0.01)	$ 0.00	$ 0.01	$ (0.02)	$ (0.03)	$ 0.00	$ 0.00	$ 0.01	$ (0.02)	$ 0.00	$ (0.04)		$ (0.05)	$ (0.03)
Diluted earnings/(loss) per share (in dollars per share)			$ (0.01)	$ 0.00	$ 0.01	$ (0.02)	$ (0.03)	$ 0.00	$ (0.01)	$ 0.00	$ (0.01)	$ 0.00	$ (0.04)		$ (0.04)	$ (0.03)
Restatement, Supplier Rebates | Restatement Impacts
Statements of Income
Cost of products sold			$ 13	$ 13	$ (4)	$ 21	$ 36	$ 23	$ 13	$ 9	$ 36	$ 22	$ 72		$ 94	$ 35
Provision for/(benefit from) income taxes			(2)	(2)	1	(8)	(13)	(8)	(5)	(1)	(13)	(3)	(26)		(18)	(13)
Restatement, Capital Leases | Restatement Impacts
Statements of Income
Cost of products sold			1	1	(1)	(1)				1		1			(1)
Interest expense			(1)	(2)	(1)	(1)				(2)		(3)			(1)
Provision for/(benefit from) income taxes			1	1	1	1				1		1			1
Restatement, Customer Incentive Program Expenses | Restatement Impacts
Statements of Income
Net sales						(33)	(34)	(40)	(40)		(80)		(114)		(147)	(152)
Cost of products sold						(31)	(32)	(38)	(38)		(76)		(108)		(139)	(145)
Selling, general and administrative expenses						(2)	(2)	(2)	(2)		(4)		(6)		(8)	(7)
Restatement, Income Taxes | Restatement Impacts
Statements of Income
Provision for/(benefit from) income taxes			14	21	5	12	1	(1)	1	26	1	40	1		(12)	(18)
Restatement, Impairments | Restatement Impacts
Statements of Income
Selling, general and administrative expenses			(17)	(31)	(1)	(1)	(1)	1	(1)	(31)	(1)	(48)	(1)		(1)	18
Provision for/(benefit from) income taxes			4	1	1	(1)	1	1	1	1	1	4	1		1	(4)
Restatement, Other Misclassifications | Restatement Impacts
Statements of Income
Net sales			5	4		(3)	(1)	(3)	(2)	4	(5)	9	(6)		(9)	(35)
Cost of products sold			5	8	(15)	(8)	10	1	1	(7)	1	(2)	10		1	(6)
Selling, general and administrative expenses			1			(2)		(22)			(22)	1	(22)		(24)	2
Interest expense			(1)	(1)	(1)	(1)	(1)	(1)	(1)	(1)	(1)	(1)	(1)		(1)	(1)
Other expense/(income), net																1
Provision for/(benefit from) income taxes			1	$ (2)	$ 3	$ (4)	$ (3)	$ 7	$ (1)	$ 1	$ 7	1	$ 4		$ 8	$ (13)
Net income/(loss) attributable to noncontrolling interest			$ (1)									$ (1)