v3.22.2
Pension and Other Postretirement Benefits - Net Periodic Benefit Cost (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Jan. 31, 2021
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Pension benefits          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Service cost   $ 4,000,000 $ 5,000,000 $ 9,000,000 $ 11,000,000
Interest cost   17,000,000 16,000,000 33,000,000 33,000,000
Expected return on plan assets   (23,000,000) (27,000,000) (47,000,000) (60,000,000)
Recognized net actuarial loss   19,000,000 24,000,000 38,000,000 56,000,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement   0 568,000,000 1,000,000 568,000,000
Net periodic benefit cost   17,000,000 586,000,000 34,000,000 608,000,000
Pension benefits | UNITED STATES          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax     549    
Defined Benefit Plan, Benefit Obligation, Payment for Settlement         19
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 200,000,000 7      
Other postretirement benefits          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Service cost   1,000,000 2,000,000 2,000,000 3,000,000
Interest cost   3,000,000 2,000,000 6,000,000 5,000,000
Recognized net actuarial loss   2,000,000 3,000,000 4,000,000 5,000,000
Amortization of prior service benefit   (2,000,000) (2,000,000) (4,000,000) (3,000,000)
Net periodic benefit cost   $ 4,000,000 $ 5,000,000 $ 8,000,000 $ 10,000,000