Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Statement of Comprehensive Income [Abstract]
Net sales	$ 5,848	$ 6,531	$ 16,747	$ 19,005
Cost of goods sold	4,874	5,375	14,036	15,655
Gross profit	974	1,156	2,711	3,350
Operating expenses:
Distribution, selling and administrative costs	873	968	2,779	2,837
Restructuring Costs	23	0	39	0
Total operating expenses	896	968	2,818	2,837
Operating income (loss)	78	188	(107)	513
Other (income) expense—net	(6)	1	(16)	(3)
Interest expense—net	63	43	178	127
Income (loss) before income taxes	21	144	(269)	389
Income tax provision (benefit)	13	39	(53)	97
Income (loss) from continuing operations	8	105	(216)	292
Income from discontinued operations	0	1	0	1
Net income (loss)	8	106	(216)	293
Other comprehensive income (loss)—net of tax:
Changes in retirement benefit obligations	0	3	1	5
Unrecognized gain (loss) on interest rate swaps	2	(1)	(4)	(15)
Comprehensive income (loss)	10	108	(219)	283
Net (loss) income	8	106	(216)	293
Series A Convertible Preferred Stock Dividends	10	0	15	0
Net (loss) income available to common shareholders	$ (2)	$ 106	$ (231)	$ 293
Net (loss) income per share—basic
Continuing operations	$ (0.01)	$ 0.48	$ (1.05)	$ 1.33
Discontinued operations	0.00	0.01	0.00	0.01
Net (loss) income per share	(0.01)	0.49	(1.05)	1.34
Net (loss) income per share—diluted:
Continuing operations	(0.01)	0.47	(1.05)	1.33
Discontinued operations	0.00	0.01	0.00	0.01
Net (loss) income per share	$ (0.01)	$ 0.48	$ (1.05)	$ 1.34
Weighted-average common shares outstanding
Basic	220	218	220	218
Diluted	220	220	220	219