Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Statement of Comprehensive Income [Abstract]
Net sales	$ 6,531	$ 6,153	$ 19,005	$ 18,134
Cost of goods sold	5,375	5,045	15,655	14,920
Gross profit	1,156	1,108	3,350	3,214
Operating expenses:
Distribution, selling and administrative costs	968	929	2,837	2,725
Restructuring costs	0	0	0	1
Total operating expenses	968	929	2,837	2,726
Operating income	188	179	513	488
Other expense (income)—net	1	(3)	(3)	(9)
Interest expense—net	43	42	127	133
Income before income taxes	144	140	389	364
Income tax provision	39	26	97	57
Income from continuing operations	105	114	292	307
Income from discontinued operations—net of tax	1	0	1	0
Net income	106	114	293	307
Other comprehensive income—net of tax:
Changes in retirement benefit obligations	3	0	5	26
Unrecognized (loss) gain on interest rate swaps	(1)	2	(15)	14
Comprehensive income	$ 108	$ 116	$ 283	$ 347
Net income per share—basic:
Continuing operations	$ 0.48	$ 0.53	$ 1.33	$ 1.42
Discontinued operations	0.01	0	0.01	0
Net income per share	0.49	0.53	1.34	1.42
Net income per share—diluted:
Continuing operations	0.47	0.52	1.33	1.41
Discontinued operations	0.01	0	0.01	0
Net income per share	$ 0.48	$ 0.52	$ 1.34	$ 1.41
Weighted-average common shares outstanding
Basic	218	217	218	216
Diluted	220	218	219	218