Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2020		Sep. 26, 2020		Jun. 27, 2020		Mar. 28, 2020		Dec. 31, 2019		Sep. 28, 2019		Jun. 29, 2019		Mar. 30, 2019		Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Earnings (Losses) Per Share, Diluted [Line Items]
Net income (loss) attributable to shareholders	$ 236,071		$ 166,060		$ 132,804		$ 49,503	[1]	$ 112,013	[2]	$ 92,131	[3]	$ (548,966)	[4]	$ 140,735		$ 584,438		$ (204,087)		$ 716,195
Weight-average shares outstanding - basic																	77,992		83,568		87,476
Net effect of various dilutive stock-based compensation awards																	643		0		968
Weighted average shares outstanding - diluted																	78,635		83,568		88,444
Net Income (loss) per Share [Abstract]
Basic	$ 3.12	[5]	$ 2.15	[5]	$ 1.69	[5]	$ 0.62	[5]	$ 1.37	[5]	$ 1.11	[5]	$ (6.48)	[5]	$ 1.65	[5]	$ 7.49		$ (2.44)		$ 8.19
Diluted	$ 3.08	[5]	$ 2.13	[5]	$ 1.68	[5]	$ 0.61	[5]	$ 1.36	[5]	$ 1.10	[5]	$ (6.48)	[5]	$ 1.63	[5]	$ 7.43	[6]	$ (2.44)	[6]	$ 8.10	[6]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount																	1,143		1,614		651

[1] Net income attributable to shareholders for the first quarter of 2020 includes a loss on investments, net of $16,810, and reserves and other adjustments of approximately $32,700 primarily related to foreign tax and other loss contingencies. These reserves are principally associated with transactional taxes on activity from several prior years, not significant to any one year

[2] Net income attributable to shareholders for the fourth quarter of 2019 includes a pension settlement loss of $20,111, a loss on disposition of businesses, net of $5,813, and tax expense of $18,193 related to the repatriation of foreign earnings and the wind down of the personal computer and mobility asset disposition business.

[3] Net income attributable to shareholders for the third quarter of 2019 includes a loss on disposition of businesses, net, of $14,573, personnel charges of $30,906 related to the operating expense reduction program, previously disclosed in July 2019.

[4] Net income attributable to shareholders for the second quarter of 2019 includes impairments of $697,993, a charge of $20,114 related to a subset of inventory held by its digital business, and a charge of $15,851 related to the receivables and inventory of its financing solutions business.

[5] Quarterly net income per share is calculated using the weighted-average shares outstanding during each quarterly period, while net income per share for the full year is calculated using the weighted-average shares outstanding during the year. Therefore, the sum of the net income per share for each of the four quarters may not equal the net income per share for the full year. As the company reported a net loss attributable to shareholders for the second quarter of 2019, basic and diluted net loss per share attributable to shareholders are the same.

[6] Stock-based compensation awards for the issuance of 1,143 shares, 1,614 shares, and 651 shares for the years ended December 31, 2020, 2019, and 2018, respectively, were excluded from the computation of net income (loss) per share on a diluted basis as their effect was anti-dilutive. As the company reported a net loss attributable to shareholders for 2019, basic and diluted net loss per share attributable to shareholders are the same.