Net Income Per Share - Calculation of Basic and Diluted Net Loss per share Attributable (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019	Dec. 31, 2015	Jun. 30, 2014
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income attributable to stockholders - continuing operations	$ 109,450	$ 18,644	$ 186,880	$ 159,459
Net loss attributable to stockholders - discontinued operations	(64,824)	(33,661)	(124,307)	(142,741)
Net income (loss) attributable to stockholders	$ 44,626	$ (15,017)	$ 62,573	$ 16,718
Basic weighted-average common shares (in shares)	170,113,000	142,553,000	169,646,000	142,248,000
Basic net income per share - continuing operations (usd per share)	$ 0.64	$ 0.13	$ 1.10	$ 1.12
Basic net income per share - discontinued operations (usd per share)	(0.38)	(0.24)	(0.73)	(1.00)
Net income (loss) per share - basic (usd per share)	$ 0.26	$ (0.11)	$ 0.37	$ 0.12
Net income available to common stockholders - continuing operations	$ 113,275	$ 19,335	$ 198,453	$ 171,606
Dilutive weighted-average common shares (shares)	198,526,000	155,583,000	200,124,000	166,861,000
Continuing operations (usd per share)	$ 0.57	$ 0.12	$ 0.99	$ 1.03
Discontinued operations (usd per share)	(0.33)	(0.22)	(0.62)	(0.86)
Net income (loss) per share - diluted (usd per share)	$ 0.24	$ (0.10)	$ 0.37	$ 0.17
Restricted stock units
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Restricted stock units (in shares)	3,560,000	4,827,000	3,354,000	2,488,000
0.875% debentures due 2021
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Restricted stock units (in shares)	7,785,000	8,203,000	10,056,000	8,203,000
4.00% debentures due 2023
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Restricted stock units (in shares)	17,068,000	0	17,068,000	13,922,000
Interest rate	4.00%		4.00%
4.00% debentures due 2023
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Interest on convertible debt	$ 3,358	$ 0	$ 10,066	$ 10,073
Interest rate	4.00%		4.00%		4.00%
0.875% debentures due 2021
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Interest on convertible debt	$ 467	$ 691	$ 1,507	$ 2,074
Interest rate	0.875%		0.875%			0.875%