Employee Benefit Plans and Postretirement Benefits - Net Amounts Recognized in Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Pension, postretirement and other postemployment benefits	$ (476)	$ (449)
Pension
Defined Benefit Plan Disclosure [Line Items]
Other assets	30	41
Pension, postretirement and other postemployment benefits	(255)	(237)
Net liability recognized at end of year	(225)	(196)
Healthcare
Defined Benefit Plan Disclosure [Line Items]
Other assets	0	0
Pension, postretirement and other postemployment benefits	(121)	(123)
Net liability recognized at end of year	(121)	(123)
Other
Defined Benefit Plan Disclosure [Line Items]
Other assets	0	0
Pension, postretirement and other postemployment benefits	(100)	(89)
Net liability recognized at end of year	$ (100)	$ (89)