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Other Operating Credits and Charges, Net Non-Operating Income and Expense (Tables) | 12 Months Ended
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Dec. 31, 2019
Other Income and Expenses [Abstract] |
Schedule of Other Nonoperating Income (Expense) [Table Text Block] | Non-operating income (expense) is comprised of the following components:
| Year ended December 31,
Dollar amounts in millions | 2019 |  | 2018 |  | 2017
Interest expense | $ | (18 | ) |  | $ | (19 | ) |  | $ | (20 | )
Amortization of debt charges | (2 | ) |  | (1 | ) |  | (1 | )
Capitalized interest | 1 |  |  | 4 |  |  | 2 |
Interest expense, net of capitalized interest | (19 | ) |  | (16 | ) |  | (19 | )
Interest income | 9 |  |  | 18 |  |  | 10 |
Gain on securities | — |  |  | 1 |  |  | — |
SERP market adjustments | 1 |  |  | (1 | ) |  | 1 |
Investment income | 10 |  |  | 18 |  |  | 11 |
Net periodic pension cost, excluding service cost | (3 | ) |  | (4 | ) |  | (10 | )
Foreign currency losses | (5 | ) |  | — |  |  | (4 | )
Gain on acquisition of controlling interest | 14 |  |  | — |  |  | — |
Other non-operating income | 6 |  |  | (4 | ) |  | (14 | )
Total non-operating income (expense) | $ | (3 | ) |  | $ | (2 | ) |  | $ | (23 | )

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- References No definition available. + Details
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- Definition Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References No definition available. + Details
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