EBPs Funded Status (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Contribution Plan
Percentage of eligible compensation the employer will match of employee contributions		6.00%
Employer's contributions charged to expense under defined contribution plan		$ 60	$ 53	$ 45
Pension Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of year		940	1,133
Service cost		23	28	30
Interest cost		46	31	28
Plan participants’ contributions		0	0
Benefits paid		(71)	(78)
Net actuarial loss (gain) (1)	[1]	68	(162)
Settlements		0	(12)
Net increase (decrease) in benefit obligation		66	(193)
Benefit obligation at end of year		1,006	940	1,133
Other Postretirement Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of year		152	200
Service cost		1	1	1
Interest cost		7	6	5
Plan participants’ contributions		2	2
Benefits paid		(13)	(12)
Net actuarial loss (gain) (1)	[1]	(4)	(45)
Settlements		0	0
Net increase (decrease) in benefit obligation		(7)	(48)
Benefit obligation at end of year		$ 145	$ 152	$ 200

[1] 2023 amounts are due primarily to changes in the following factors: Pension Benefits - interest crediting rate assumption and discount rate assumptions. 2022 amounts are due primarily to changes in the following factors: Pension Benefits - discount rate assumptions, partially offset by interest crediting rate assumption; Other Postretirement Benefits - discount rate assumption.