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Pension Plans and Other Post Employment Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2018
Retirement Benefits [Abstract] |
Schedule of Net Benefit Costs [Table Text Block] |
| Successor | Predecessor
(In millions) | Nine Months Ended September 30, 2018 | For the Period September 1 - September 30, 2017 | For the Period January 1 - August 31, 2017
Defined Benefit Pension Plans: |  |  |
Service cost | $ | 99 |  | $ | 12 |  | $ | 92 |
Interest cost | 565 |  | 62 |  | 524 |
Expected return on plan assets | (903 | ) | (102 | ) | (824 | )
Amortization of unrecognized (gain) loss | (1 | ) | — |  | 506 |
Amortization of prior service benefit | — |  | — |  | (3 | )
Curtailment/settlement gain | (2 | ) | — |  | — |
Net periodic benefit (credit) cost - Total | $ | (242 | ) | $ | (28 | ) | $ | 295 |
Less: Discontinued operations | — |  | — |  | 3 |
Net periodic benefit (credit) cost - Continuing operations | $ | (242 | ) | $ | (28 | ) | $ | 292 |
Other Post Employment Benefits: |  |  |
Service cost | $ | 7 |  | $ | 1 |  | $ | 6 |
Interest cost | 63 |  | 6 |  | 60 |
Amortization of unrecognized loss | — |  | — |  | 61 |
Amortization of prior service benefit | — |  | — |  | (46 | )
Net periodic benefit cost - Continuing operations | $ | 70 |  | $ | 7 |  | $ | 81 |
| Successor | Predecessor
(In millions) | Three Months Ended September 30, 2018 | For the Period September 1 - September 30, 2017 | For the Period July 1 - August 31, 2017
Defined Benefit Pension Plans: |  |  |
Service cost | $ | 32 |  | $ | 12 |  | $ | 25 |
Interest cost | 186 |  | 62 |  | 132 |
Expected return on plan assets | (299 | ) | (102 | ) | (207 | )
Amortization of unrecognized loss | — |  | — |  | 127 |
Amortization of prior service benefit | — |  | — |  | (1 | )
Curtailment/settlement loss | 2 |  | — |  | — |
Net periodic benefit (credit) cost - Total | $ | (79 | ) | $ | (28 | ) | $ | 76 |
Less: Discontinued operations | — |  | — |  | 1 |
Net periodic benefit (credit) cost - Continuing operations | $ | (79 | ) | $ | (28 | ) | $ | 75 |
Other Post Employment Benefits: |  |  |
Service cost | $ | 3 |  | $ | 1 |  | $ | 2 |
Interest cost | 20 |  | 6 |  | 15 |
Amortization of unrecognized loss | — |  | — |  | 15 |
Amortization of prior service benefit | — |  | — |  | (11 | )
Net periodic benefit cost - Continuing operations | $ | 23 |  | $ | 7 |  | $ | 21 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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