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Pension Plans and Other Post Employment Benefit Plans Additional Information (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 4 Months Ended | 8 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Nov. 30, 2017 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2017 USD ($) | Aug. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Nov. 30, 2016
U.S. Retirement Savings Plan [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Employer Matching Contribution, Percent of Match |  |  |  | 100.00% |  |  |  |
Employer Matching Contribution, Percent of Employees' Gross Pay |  |  |  | 6.00% |  |  |  |
Employer Discretionary Contribution Percent |  |  |  | 3.00% |  |  |  |
Employers Discretionary Contribution, Vesting Period |  |  |  | 3 years |  |  |  |
Pension Plan | Funded Pension Plans other than Principal U.S. Plan and Remaining Plans with no Plan Assets [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Expected Future Employer Contributions, Next Fiscal Year |  | $ 200 |  | $ 200 |  |  |  |
Other Post Employment Benefits Plan |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Expected Amortization of Gain (Loss), Next Fiscal Year |  | 1 |  | 1 |  |  |  |
Expected Future Employer Contributions, Next Fiscal Year |  | 250 |  | 250 |  |  |  |
Predecessor [Member] | Remaining Plans with no Plan Assets [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Employer contributions |  |  |  |  | $ 57 | $ 184 | $ 144 |
Predecessor [Member] | U.S. Retirement Savings Plan [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Defined Contribution Plan, Employer Contribution |  |  |  |  | 129 | 187 | 219 |
Predecessor [Member] | DuPont Other Contribution Plans [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Defined Contribution Plan, Employer Contribution |  |  |  |  | 33 | 33 | 57 |
Predecessor [Member] | Pension Plan |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Remeasurement Impact Benefit Obligation |  |  |  |  |  | 527 |  |
Curtailment loss (gain) |  |  | $ (25) |  | 0 | 40 | $ (6) |
Employer contributions |  |  |  |  | $ 3,024 | $ 535 |  |
Discount Rate |  |  | 3.80% |  | 3.42% | 3.80% |  |
Expected long-term rate of return on plan assets |  |  |  |  | 7.66% | 7.74% | 8.10% |
Predecessor [Member] | Pension Plan | Principal U.S. Pension Plan [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Curtailment loss (gain) |  |  |  |  |  | $ 63 |  |
Employer contributions |  |  |  |  | $ 2,900 | $ 230 |  |
Lump-Sum Payments |  |  | $ 550 |  |  |  |  |
Expected long-term rate of return on plan assets |  |  |  |  | 8.00% | 8.00% | 8.50% |
Predecessor [Member] | Pension Plan | Other Pension Plan [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Employer contributions |  |  |  |  | $ 67 | $ 121 | $ 164 |
Predecessor [Member] | Other Post Employment Benefits Plan |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Eligible Employee Age Threshold |  |  |  |  |  |  |  | 50
Curtailment loss (gain) |  |  | $ (357) |  | 0 | (392) | (274) |
Pre-tax cash requirements to cover actual net claims costs and related administrative expenses |  |  |  |  | 166 | 218 | 237 |
Employer contributions |  |  |  |  | $ 166 | $ 218 |  |
Discount Rate |  |  | 4.03% |  | 3.62% | 4.03% |  |
Successor [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Trust Asset |  | $ 558 |  | 558 |  |  |  |
Successor [Member] | Other Pension Plan [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Employer contributions |  |  |  | 34 |  |  |  |
Successor [Member] | Remaining Plans with no Plan Assets [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Employer contributions |  |  |  | 34 |  |  |  |
Successor [Member] | U.S. Retirement Savings Plan [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Defined Contribution Plan, Employer Contribution |  |  |  | 53 |  |  |  |
Successor [Member] | DuPont Other Contribution Plans [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Defined Contribution Plan, Employer Contribution |  |  |  | 17 |  |  |  |
Successor [Member] | Pension Plan |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Curtailment loss (gain) |  |  |  | 0 |  |  |  |
Employer contributions |  |  |  | 68 |  |  |  |
Remeasurement Impact Underfunded Status |  |  |  | $ 560 |  |  |  |
Discount Rate |  | 3.37% |  | 3.37% |  |  |  |
Expected long-term rate of return on plan assets |  |  |  | 6.24% |  |  |  |
Successor [Member] | Pension Plan | Principal U.S. Pension Plan [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Lump-Sum Payments |  | $ 140 |  |  |  |  |  |
Expected long-term rate of return on plan assets |  |  |  | 6.25% |  |  |  |
Successor [Member] | Other Post Employment Benefits Plan |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Remeasurement Impact Benefit Obligation |  |  |  | $ 41 |  |  |  |
Curtailment loss (gain) |  |  |  | 0 |  |  |  |
Pre-tax cash requirements to cover actual net claims costs and related administrative expenses |  |  |  | 59 |  |  |  |
Employer contributions |  |  |  | $ 59 |  |  |  |
Discount Rate |  | 3.56% |  | 3.56% |  |  |  |
Nonqualified Plan [Member] | Successor [Member] | Trust Agreement [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Contributions to Trust | $ 571 |  |  |  |  |  |  |
Trust Asset Distribution |  | $ 13 |  |  |  |  |  |
Trust Asset |  | $ 558 |  | $ 558 |  |  |  |
Discontinued Operations [Member] | Predecessor [Member] | DuPont Other Contribution Plans [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Defined Contribution Plan, Employer Contribution |  |  |  |  | $ 5 | $ 6 | $ 39 |
Discontinued Operations [Member] | Successor [Member] | DuPont Other Contribution Plans [Member] |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Defined Contribution Plan, Employer Contribution |  |  |  | $ 1 |  |  |  |
2016 Global Cost Savings and Restructuring Plan [Member] | Predecessor [Member] | Other Post Employment Benefits Plan |  |  |  |  |  |  |  |
Defined Benefit and Contribution Disclosures [Line Items] |  |  |  |  |  |  |  |
Curtailment loss (gain) |  |  |  |  |  | $ (35) |  |

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- Definition Amount of payment, which decreases benefit obligation of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. Excludes decreases to benefit obligation for remeasurement due to settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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