Employee Benefit Plans (Accumulated Other Comprehensive Loss Pretax Amounts Not Yet Reflected in Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated net actuarial losses/(gains)	$ 670	$ 682
Accumulated prior service credit	0	0
Total	670	682
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Accumulated net actuarial losses/(gains)	(37)	(15)
Accumulated prior service credit	(16)	(20)
Total	$ (53)	$ (35)