CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Sales	[1]	$ 7,231,260	$ 7,078,118	$ 20,219,171	$ 21,578,657
Cost of sales		6,442,670	6,279,277	17,951,727	19,103,219
Gross profit		788,590	798,841	2,267,444	2,475,438
Operating expenses:
Selling, general, and administrative expenses		504,211	522,446	1,539,520	1,677,734
Depreciation and amortization		46,732	45,231	140,654	139,739
Loss on disposition of businesses, net		0	14,573	0	15,439
Impairments		2,305	253	7,223	698,246
Restructuring, integration, and other charges (credits)		(2,840)	43,120	6,948	74,692
Costs and expenses, total		550,408	625,623	1,694,345	2,605,850
Operating income (loss)		238,182	173,218	573,099	(130,412)
Equity in earnings (losses) of affiliated companies		61	(1,070)	308	(2,155)
Gain (loss) on investments, net		2,726	1,126	(3,183)	7,864
Employee benefit plan (expense) credit		595	(1,071)	(1,687)	(3,349)
Interest and other financing expense, net		(30,461)	(49,882)	(105,596)	(153,426)
Income (loss) before income taxes		211,103	122,321	462,941	(281,478)
Provision for income taxes		44,707	29,340	113,453	30,878
Consolidated net income (loss)		166,396	92,981	349,488	(312,356)
Noncontrolling interests		336	850	1,121	3,744
Net income (loss) attributable to shareholders		$ 166,060	$ 92,131	$ 348,367	$ (316,100)
Net income (loss) per share:
Basic		$ 2.15	$ 1.11	$ 4.42	$ (3.75)
Diluted	[2]	$ 2.13	$ 1.10	$ 4.39	$ (3.75)
Weighted-average shares outstanding:
Basic		77,390	82,711	78,807	84,246
Diluted		78,086	83,397	79,404	84,246

[1] Includes sales related to the United States of $2,524,988 and $7,400,960 for the third quarter and first nine months of 2020 and $2,875,687 and $8,560,115 for the third quarter and first nine months 2019, respectively.

[2] Stock-based compensation awards for the issuance of 1,267 and 1,456 shares for the third quarter and first nine months of 2020, and 1,086 shares for the third quarter of 2019, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive. As the company reported a net loss attributable to shareholders for the first nine months of 2019, basic and diluted net loss per share attributable to shareholders are the same and stock-based compensation awards for the issuance of 1,886 shares were excluded from the computation of net loss per share on a diluted basis as their effect was anti-dilutive.