Employee Pension and Other Postretirement Benefits Schedule of Expected Benefit Payments and Receipts (Table) (Details) $ in Millions	Dec. 31, 2018 USD ($)
Pension Benefits [Member]
Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2019	$ 254
2020	266
2021	285
2022	306
2022	326
Years 2024 to 2028	1,927
Other Benefits [Member]
Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2019	33
2020	35
2021	37
2022	37
2022	38
Years 2024 to 2028	181
Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt [Abstract]
Years 2024 to 2028	$ 2

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Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.

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Amount of prescription drug subsidy receipts expected after fifth fiscal year following latest fiscal year.

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