Plans of Restructuring - Schedule of Restructuring Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	$ 23	$ 15	$ 48	$ 25
Restructuring Incurred Cost Statement Of Income Or Comprehensive Income Extensible Enumeration			Selling, General and Administrative Expense
2024 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	23		$ 48
2024 Plan [Member] \| Severance and Employee-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	18		40
2024 Plan [Member] \| Impairment and Accelerated Depreciation and Amortization of Right-of-Use Lease Assets and Other Long-Lived Assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	2		3
2024 Plan [Member] \| Exit and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	2		4
2024 Plan [Member] \| Loss on Disposal of a Business [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	1		1
2022 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		15	0	25
2022 Plan [Member] \| Severance and Employee-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		9		16
2022 Plan [Member] \| Impairment and Accelerated Depreciation and Amortization of Right-of-Use Lease Assets and Other Long-Lived Assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		5		6
2022 Plan [Member] \| Exit and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		1		3
Operating Segments [Member] \| Global Distribution and Value-Added Services [Member] \| 2024 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	14		26
Operating Segments [Member] \| Global Distribution and Value-Added Services [Member] \| 2024 Plan [Member] \| Severance and Employee-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	11		21
Operating Segments [Member] \| Global Distribution and Value-Added Services [Member] \| 2024 Plan [Member] \| Impairment and Accelerated Depreciation and Amortization of Right-of-Use Lease Assets and Other Long-Lived Assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0		1
Operating Segments [Member] \| Global Distribution and Value-Added Services [Member] \| 2024 Plan [Member] \| Exit and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	2		3
Operating Segments [Member] \| Global Distribution and Value-Added Services [Member] \| 2024 Plan [Member] \| Loss on Disposal of a Business [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	1		1
Operating Segments [Member] \| Global Distribution and Value-Added Services [Member] \| 2022 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		14		22
Operating Segments [Member] \| Global Distribution and Value-Added Services [Member] \| 2022 Plan [Member] \| Severance and Employee-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		8		12
Operating Segments [Member] \| Global Distribution and Value-Added Services [Member] \| 2022 Plan [Member] \| Impairment and Accelerated Depreciation and Amortization of Right-of-Use Lease Assets and Other Long-Lived Assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		5		9
Operating Segments [Member] \| Global Distribution and Value-Added Services [Member] \| 2022 Plan [Member] \| Exit and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		1		1
Operating Segments [Member] \| Global Specialty Products [Member] \| 2024 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	7		12
Operating Segments [Member] \| Global Specialty Products [Member] \| 2024 Plan [Member] \| Severance and Employee-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	5		10
Operating Segments [Member] \| Global Specialty Products [Member] \| 2024 Plan [Member] \| Impairment and Accelerated Depreciation and Amortization of Right-of-Use Lease Assets and Other Long-Lived Assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	2		2
Operating Segments [Member] \| Global Specialty Products [Member] \| 2024 Plan [Member] \| Exit and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0		0
Operating Segments [Member] \| Global Specialty Products [Member] \| 2024 Plan [Member] \| Loss on Disposal of a Business [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0		0
Operating Segments [Member] \| Global Specialty Products [Member] \| 2022 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		1		3
Operating Segments [Member] \| Global Specialty Products [Member] \| 2022 Plan [Member] \| Severance and Employee-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		1		3
Operating Segments [Member] \| Global Specialty Products [Member] \| 2022 Plan [Member] \| Impairment and Accelerated Depreciation and Amortization of Right-of-Use Lease Assets and Other Long-Lived Assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		0		0
Operating Segments [Member] \| Global Specialty Products [Member] \| 2022 Plan [Member] \| Exit and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		0		0
Operating Segments [Member] \| Global Technology [Member] \| 2024 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0		2
Operating Segments [Member] \| Global Technology [Member] \| 2024 Plan [Member] \| Severance and Employee-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0		1
Operating Segments [Member] \| Global Technology [Member] \| 2024 Plan [Member] \| Impairment and Accelerated Depreciation and Amortization of Right-of-Use Lease Assets and Other Long-Lived Assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0		0
Operating Segments [Member] \| Global Technology [Member] \| 2024 Plan [Member] \| Exit and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0		1
Operating Segments [Member] \| Global Technology [Member] \| 2024 Plan [Member] \| Loss on Disposal of a Business [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0		0
Operating Segments [Member] \| Global Technology [Member] \| 2022 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		0		1
Operating Segments [Member] \| Global Technology [Member] \| 2022 Plan [Member] \| Severance and Employee-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		0		1
Operating Segments [Member] \| Global Technology [Member] \| 2022 Plan [Member] \| Impairment and Accelerated Depreciation and Amortization of Right-of-Use Lease Assets and Other Long-Lived Assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		0		0
Operating Segments [Member] \| Global Technology [Member] \| 2022 Plan [Member] \| Exit and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		0		0
Corporate, Non-Segment [Member] \| 2024 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	2		8
Corporate, Non-Segment [Member] \| 2024 Plan [Member] \| Severance and Employee-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	2		8
Corporate, Non-Segment [Member] \| 2024 Plan [Member] \| Impairment and Accelerated Depreciation and Amortization of Right-of-Use Lease Assets and Other Long-Lived Assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0		0
Corporate, Non-Segment [Member] \| 2024 Plan [Member] \| Exit and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	0		0
Corporate, Non-Segment [Member] \| 2024 Plan [Member] \| Loss on Disposal of a Business [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	$ 0		$ 0
Corporate, Non-Segment [Member] \| 2022 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		0		(1)
Corporate, Non-Segment [Member] \| 2022 Plan [Member] \| Severance and Employee-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		0		0
Corporate, Non-Segment [Member] \| 2022 Plan [Member] \| Impairment and Accelerated Depreciation and Amortization of Right-of-Use Lease Assets and Other Long-Lived Assets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		0		(3)
Corporate, Non-Segment [Member] \| 2022 Plan [Member] \| Exit and Other Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs		$ 0		$ 2

HENRY SCHEIN INC 10-Q