Share-based Compensation and Employee Benefits (Components of Funded Status) (Details) - USD ($) $ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
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Pension Benefits [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Non-current benefit asset | $ 0 | $ 0 |
Current benefit liability | 0 | 0 |
Non-current benefit liability | (702) | (686) |
Funded status - net liability at December 31, | (702) | (686) |
OPEB [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Non-current benefit asset | 190 | 198 |
Current benefit liability | (13) | (15) |
Non-current benefit liability | (210) | (273) |
Funded status - net liability at December 31, | (33) | (90) |
OPEB [Member] | Other Affiliates [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Non-current benefit asset | $ 32 | $ 33 |
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- Definition Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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