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Other Operating and Non-Operating Income (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Nonoperating Income (Expense) [Abstract] |  |  |  |
Investment income, net of adjustments | $ 0 | $ 4,000,000 |  |
Amortization of debt charges | 0 | 0 | $ (1,000,000) | $ (1,000,000)
Interest Expense | (4,000,000) | (6,000,000) | (9,000,000) | (12,000,000)
Interest Income | 0 | 1,000,000 | 1,000,000 | 1,000,000
Available-for-sale Securities, Gross Realized Gains | 0 | 3,000,000 | 0 | 3,000,000
SERP market adjustments | 0 | 0 | 0 | 1,000,000
Investment income |  |  | 1,000,000 | 3,000,000
Net periodic pension cost, excluding service cost | 0 | 0 | 0 | (1,000,000)
Gain (Loss) on Extinguishment of Debt | 0 | 0 | (11,000,000) | 0
Foreign currency gain (loss) | (6,000,000) | (1,000,000) | (5,000,000) | 5,000,000
Other non-operating items | (6,000,000) | (1,000,000) | (16,000,000) | 4,000,000
Other Income and Expenses [Abstract] |  |  |  |
Proceeds from Insurance Settlement, Operating Activities | 2,000,000 | 0 | 2,000,000 | 0
Canadian wage subsidies | 0 | 4,000,000 | 0 | 4,000,000
Product line discontinuance charges | 0 | (10,000,000) | 0 | (10,000,000)
Interest expense | (3,000,000) | (6,000,000) | (8,000,000) | (11,000,000)
Other operating income, other | 1,000,000 | 2,000,000 | 1,000,000 | 2,000,000
Other Operating Charges And Credits, Net | 3,000,000 | (6,000,000) | 3,000,000 | (8,000,000)
Restructuring Charges | $ 0 | $ (2,000,000) | $ 0 | $ (4,000,000)

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