Defined Severance Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Retirement Benefits [Abstract]
Current service costs	$ 52	$ 39	$ 102	$ 79
Interest cost	4	4	8	8
Amortization of:
Prior service cost	0	1	0	1
Net actuarial loss	3	1	5	2
Net periodic benefit cost	$ 59	$ 45	$ 115	$ 90