Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Statement of Comprehensive Income [Abstract]
Net sales	$ 25,939	$ 24,175	$ 24,147
Cost of goods sold	21,352	19,869	19,929
Gross profit	4,587	4,306	4,218
Operating expenses:
Distribution, selling and administrative costs	3,888	3,647	3,631
Restructuring costs (benefit)	0	1	(1)
Total operating expenses	3,888	3,648	3,630
Operating income	699	658	588
Other expense (income)—net	4	(13)	14
Interest expense—net	184	175	170
Income before income taxes	511	496	404
Income tax provision (benefit)	126	89	(40)
Net income	385	407	444
Other comprehensive income—net of tax:
Changes in retirement benefit obligations	45	6	16
Unrecognized (loss) gain on interest rate swaps	(15)	5	8
Comprehensive income	$ 415	$ 418	$ 468
Net income per share:
Basic	$ 1.77	$ 1.88	$ 2.00
Diluted	$ 1.75	$ 1.87	$ 1.97
Weighted-average common shares outstanding
Basic	218	216	223
Diluted	220	218	226