EBP Benefit Pymts & Defined Contribution Plans (Details 5) - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
Benefit Plan Disclosure [Line Items] | |||
Employer's contributions charged to expense under defined contribution plans | $ 36 | $ 39 | $ 39 |
Other Postretirement Benefits [Member] | |||
Benefit Plan Disclosure [Line Items] | |||
Expected total plans contribution, approximate | 7 | ||
Expected benefit payments | |||
2017 | 13 | ||
2018 | 13 | ||
2019 | 13 | ||
2020 | 13 | ||
2021 | 13 | ||
2022-2026 | 62 | ||
Pension Benefits [Member] | |||
Benefit Plan Disclosure [Line Items] | |||
Expected total plans contribution, approximate | 62 | ||
Expected benefit payments | |||
2017 | 99 | ||
2018 | 103 | ||
2019 | 103 | ||
2020 | 106 | ||
2021 | 111 | ||
2022-2026 | 562 | ||
Nonqualified Pension Benefits - Supplemental Employee Retirement Benefits [Member] | |||
Benefit Plan Disclosure [Line Items] | |||
Expected total plans contribution, approximate | 2 | ||
Tax-qualified Pension Benefits [Member] | |||
Benefit Plan Disclosure [Line Items] | |||
Expected total plans contribution, approximate | $ 60 |