Post-Employment Benefits - Summary of Accumulated Benefit Obligations, Projected Benefit Obligations, and Plan Assets Where Accumulated Benefit Obligations Exceed Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Postemployment Benefits [Abstract]
Accumulated benefit obligation	$ 1,112	$ 1,175
Projected benefit obligation	1,180	1,248
Fair value of plan assets	$ 149	$ 144