Defined Severance Benefits - Schedule of Defined Benefits Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined benefit obligation, beginning balance	$ 491	$ 396
Current service costs	220	166	$ 141
Interest cost	17	16	14
Actuarial (gains) losses	(6)	52
Payments from plans	(102)	(79)
Cumulative effects of foreign currency translation	11	(60)
Defined benefit obligation, ending balance	631	491	$ 396
Current	146	96
Noncurrent	$ 485	$ 395