Employee Benefits - Overview of the Accumulated Benefit Obligation, Fair Value of Plan Assets, Funded Status and Net Amount (Details) - Other Post-Retirement Benefits - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated projected benefit obligation	$ 81	$ 79
Fair value of plan assets	17	16
Funded status	(64)	(63)
Unrecognized (gain) loss	(30)	(26)
Net amount recognized	$ (94)	$ (89)