Defined Severance Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Retirement Benefits [Abstract]
Current service costs	$ 43	$ 36	$ 123	$ 104
Interest cost	3	3	11	10
Amortization of:
Prior service credit	1	1	2	2
Net actuarial loss	1	1	2	1
Net periodic benefit cost	$ 48	$ 41	$ 138	$ 117