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Other Income - Net (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Other Income and Expenses [Abstract] |  |  |  |  |
Net Periodic Pension and Post-retirement Benefit Credit | $ 42 | $ 43 |  | $ 38 |
Interest Income | 17 | 48 |  | 32 |
Debt Repurchase Expense | (48) | (10) |  | 0 |
Miscellaneous Income | 8 | 7 |  | 4 |
Total Other Income - Net | $ 19 | $ 88 | [1] | $ 74 | [1]
[1] | Certain prior year data has been reclassified to conform to the current presentation.

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- Definition Amount of expense (reversal of expense) for net periodic benefit cost components, excluding service cost component, of defined benefit plan. Amount includes, but is not limited to, interest cost, expected (return) loss on plan asset, amortization of prior service cost (credit), amortization of (gain) loss, amortization of transition (asset) obligation, settlement (gain) loss, curtailment (gain) loss and certain termination benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109237824&loc=SL108413299-114919 + Details
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