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Other Operating Credits and Charges, Net | 12 Months Ended
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Dec. 31, 2020
Other Operating Credits And Charges, Net [Abstract] |
Other Operating Credits And Charges Net [Text Block} | OTHER OPERATING AND NON-OPERATING INCOME (EXPENSE) Other operating credits and charges, net The major components of “Other operating credits and charges, net” in the Consolidated Statements of Income for the years ended December 31 are reflected in the table below and described in the paragraphs following the table:
| Year ended December 31,
2020 |  | 2019 |  | 2018
Reorganization and facility curtailment charges | $ | (5) |  |  | $ | (12) |  |  | $ | (10) |
Canadian wage subsidies | 9 |  |  | — |  |  | — |
Product-line discontinuance charges | (8) |  |  | — |  |  | — |
Environment costs, net of insurance recoveries | (3) |  |  | 9 |  |  | 8 |
Adjustment to product-related warranty reserves | — |  |  | 4 |  |  | 8 |
Other | 3 |  |  | (2) |  |  | (4) |
| $ | (4) |  |  | $ | (1) |  |  | $ | 2 |
During 2020, we recognized a charge of $3 million related to additional estimated environmental costs to be paid by a third party associated with a non-operating site. We also incurred severance and other charges of $5 million related to certain reorganizations, and we recorded a charge of $8 million related to the discontinuance of our fiber product (primarily related to fiber inventory adjustments to net realizable values). Additionally, we received $9 million of Canadian wage subsidies during 2020. During 2019, we recognized a $4 million gain related to the reduction of product-related warranty reserves associated with CanExel® products, and we received $9 million related to insurance recoveries on property damage. We also recognized $12 million of severance and other charges related to certain reorganizations. During 2018, we recognized a $8 million gain related to the reduction of product-related warranty reserves associated with CanExel® products and a gain of $8 million related to the settlement of environmental costs to be paid by a third party associated with a non-operating site. We also recognized $10 million of severance and other charges related to certain reorganizations within the corporate offices and $5 million related to property damage sustained. Non-operating income (expense) Non-operating income (expense) is comprised of the following components:
| Year ended December 31,
| 2020 |  | 2019 |  | 2018
Interest expense | $ | (17) |  |  | $ | (18) |  |  | $ | (19) |
Amortization of debt charges | (2) |  |  | (2) |  |  | (1) |
Capitalized interest | — |  |  | 1 |  |  | 4 |
Interest expense, net of capitalized interest | (19) |  |  | (19) |  |  | (16) |
Interest income | 2 |  |  | 9 |  |  | 18 |
Gain on sale of auction rate securities | 3 |  |  | — |  |  | 1 |
SERP market adjustments | (1) |  |  | 1 |  |  | (1) |
Investment income | 4 |  |  | 10 |  |  | 18 |
Net periodic pension cost, excluding service cost | (1) |  |  | (3) |  |  | (4) |
Foreign currency gains (losses) | 1 |  |  | (5) |  |  | — |
Gain on acquisition of controlling interest | — |  |  | 14 |  |  | — |
Other non-operating income | $ | — |  |  | $ | 6 |  |  | $ | (4) |

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- Definition Other Operating Credits and Charges Net + References No definition available. + Details
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