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Other Operating and Non-Operating Income (Notes)
 9 Months Ended
Sep. 30, 2020
Nonoperating Income (Expense) [Abstract]  
Other Operating and Non-Operating Income OTHER OPERATING AND NON-OPERATING INCOME

Other operating credits and charges, net

 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2020
 
2019
 
2020
 
2019
Reorganization charges
$
(1
)
 
$
(2
)
 
$
(5
)
 
$
(5
)
Canadian wage subsidies
5

 
—

 
9

 
—

Product-line discontinuance charges
1

 
—

 
(9
)
 
—

Environmental costs
(2
)
 
—

 
(2
)
 
—

Severance and other charges associated with curtailment
—

 
(2
)
 
—

 
(3
)
Adjustment to product-related warranty reserves
—

 
—

 
—

 
4

Other
—

 
—

 
2

 
1

 
$
3

 
$
(3
)
 
$
(5
)
 
$
(2
)


During the three and nine months ended September 30, 2020, we recognized a charge of $2 million related to additional estimated environmental costs to be paid by a third party associated with a non-operating site. We incurred severance and other charges of $1 million and $5 million for the three and nine months ended September 30, 2020, respectively, related to certain reorganizations and product-line discontinuance. We received $5 million and $9 million of Canadian wage subsidies during the three and nine months ended September 30, 2020, respectively. Additionally, we recorded a recovery of $1 million and charges of $9 million for the three and nine months ended September 30, 2020, respectively, related to the discontinuance of our fiber product (primarily related to fiber inventory adjustments to net realizable values).

During the nine months ended September 30, 2019, we reduced our product-related warranty reserves by $4 million. Additionally, we recorded a charge of $3 million and $8 million for the three and nine months ended September 30, 2019, respectively, related to severance associated with certain reorganizations within the corporate office and severance and other charges associated with planned curtailments.

Non-operating income

Non-operating income is comprised of the following components:
 
 
Three Months Ended
 
Nine Months Ended
 
 
September 30,
 
September 30,
 
 
2020
 
2019
 
2020
 
2019
Interest expense
 
$
(5
)
 
$
(5
)
 
$
(16
)
 
$
(14
)
Amortization of debt charges
 
—

 
—

 
(1
)
 
(1
)
Capitalized interest, net of reversals
 
—

 
(1
)
 
—

 
1

Interest expense
 
(5
)
 
(6
)
 
(17
)
 
(14
)
 
 
 
 
 
 
 
 
 
Interest income
 
—

 
2

 
1

 
8

Gain on sale of auction rate securities
 
—

 
—

 
3

 
—

SERP market adjustments
 
—

 
—

 
(1
)
 
1

Investment income
 
—

 
2

 
3

 
9

 
 
 
 
 
 
 
 
 
Net periodic pension cost, excluding service cost
 
—

 
(1
)
 
(1
)
 
(2
)
Gain on acquisition of controlling interest
 
—

 
—

 
—

 
14

Foreign currency gain (loss)
 
—

 
—

 
5

 
(4
)
Other non-operating items
 
$
—

 
$
(1
)
 
$
4

 
$
8