Segment Information - Summary of Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total depreciation and amortization	$ 538,023	$ 407,978	$ 350,529
Total capital expenditures	469,839	567,339	512,675
Net sales	24,300,141	23,486,569	23,090,610
Total net property, plant and equipment	2,172,140	1,950,760	1,616,785
United States
Segment Reporting Information [Line Items]
Net sales	15,788,840	15,318,989	15,247,740
Total net property, plant and equipment	1,254,960	1,161,136	935,583
Europe
Segment Reporting Information [Line Items]
Net sales	4,010,876	3,839,134	3,611,453
Total net property, plant and equipment	423,976	384,161	339,330
Canada
Segment Reporting Information [Line Items]
Net sales	2,022,110	1,982,719	2,011,343
Total net property, plant and equipment	238,360	189,978	147,404
Australasia
Segment Reporting Information [Line Items]
Net sales	2,377,182	2,258,729	2,149,376
Total net property, plant and equipment	253,670	214,677	193,638
Mexico
Segment Reporting Information [Line Items]
Net sales	101,133	86,998	70,698
Total net property, plant and equipment	1,174	808	830
Industrial \| Australasia
Segment Reporting Information [Line Items]
Net sales	529,492	540,968	524,383
Operating Segments \| North America Automotive
Segment Reporting Information [Line Items]
Total depreciation and amortization	136,384	104,601	82,704
Total capital expenditures	130,094	129,899	77,295
Net sales	9,520,042	9,212,238	9,010,337
Operating Segments \| Industrial
Segment Reporting Information [Line Items]
Total depreciation and amortization	42,060	34,818	30,082
Total capital expenditures	44,734	76,730	53,823
Net sales	8,921,533	8,717,436	8,843,827
Operating Segments \| International Automotive
Segment Reporting Information [Line Items]
Total depreciation and amortization	120,451	101,935	80,813
Total capital expenditures	156,853	181,805	202,648
Net sales	5,858,566	5,556,895	5,236,446
Corporate Nonsegment
Segment Reporting Information [Line Items]
Total depreciation and amortization	86,697	23,630	9,752
Total capital expenditures	138,158	178,905	178,909
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Segment Reporting Information [Line Items]
Total depreciation and amortization	$ 152,431	$ 142,994	$ 147,178

GENUINE PARTS CO 10-K