Retirement Plans and Post Retirement Benefits Defined Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Retirement Benefits [Abstract]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax	$ 0	$ 4	$ 5
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax, Total	(4)	(71)	(5)
Defined Benefit Plan, Plan Assets, Contributions by Employer		5
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	(2)	(247)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	0	5	(1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax	4	62	2
Defined Benefit Plan, Plan Assets, Payment for Settlement	2	247
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Expected Gain (Loss) Due to Settlement and Curtailment	6
Loss due to settlement	$ (4)	$ (82)	$ (2)