v3.10.0.1
Employee Benefit Plans (Expected Future Benefit Payments) (Details)
$ in Millions
Dec. 31, 2018
USD ($)
Pension Plans  
Pension and Other Postretirement Plans  
2019 $ 139
2020 144
2021 151
2022 160
2023 163
2024-2028 904
Other Postretirement Plan  
Pension and Other Postretirement Plans  
2019 6
2020 6
2021 6
2022 6
2023 7
2024-2028 $ 27