CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS) AND COMPREHENSIVE INCOME (LOSS) UNAUDITED - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 05, 2025	Jun. 29, 2024	Jul. 05, 2025	Jun. 29, 2024
Income Statement [Abstract]
Net sales	$ 220,388	$ 259,991	$ 453,681	$ 514,874
Cost of sales	93,659	123,140	183,960	244,531
Gross profit	126,729	136,851	269,721	270,343
Operating expenses:
Selling, general and administrative expenses	110,946	153,604	244,784	305,876
Other long-lived asset impairments	0	577	79	950
Restructuring expenses		16,673	23,116	26,726
Total operating expenses	118,241	170,854	267,979	333,552
Operating income (loss)	8,488	(34,003)	1,742	(63,209)
Interest expense	4,321	4,082	8,788	9,194
Other income (expense) - net	(38)	1,450	(3,307)	5,338
Income (loss) before income taxes	4,129	(36,635)	(10,353)	(67,065)
Provision (benefit) for income taxes	6,230	2,208	9,598	(3,908)
Net income (loss)	(2,101)	(38,843)	(19,951)	(63,157)
Less: Net income (loss) attributable to noncontrolling interests	193	(58)	(81)	(76)
Net income (loss) attributable to Fossil Group, Inc.	(2,294)	(38,785)	(19,870)	(63,081)
Other comprehensive income (loss), net of taxes:
Currency translation adjustment	11,511	(1,631)	20,802	(4,117)
Cash flow hedges - net change	0	107	(474)	753
Pension plan activity	0	0	0	(19)
Total other comprehensive income (loss)	11,511	(1,524)	20,328	(3,383)
Total comprehensive income (loss)	9,410	(40,367)	377	(66,540)
Less: Comprehensive income (loss) attributable to noncontrolling interests	193	(58)	(81)	(76)
Comprehensive income (loss) attributable to Fossil Group, Inc.	$ 9,217	$ (40,309)	$ 458	$ (66,464)
Earnings (loss) per share:
Basic (in dollars per share)	$ (0.04)	$ (0.73)	$ (0.37)	$ (1.20)
Diluted (in dollars per share)	$ (0.04)	$ (0.73)	$ (0.37)	$ (1.20)
Weighted average common shares outstanding:
Basic (in shares)	53,624	52,927	53,435	52,709
Diluted (in shares)	53,624	52,927	53,435	52,709