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Employee Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2021
Retirement Benefits [Abstract] |
Schedule Of Defined Benefit Plans Disclosures Text Block | The components of net periodic benefit cost, included in other operating expenses on the Company’s condensed consolidated statements of income, for the three and six months ended June 30, 2021 and 2020 were as follows (dollars in millions):
|  | Pension Benefits |  | Other Benefits
|  | Three months ended June 30, |  | Three months ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Service cost |  | $ | 5 |  |  | $ | 4 |  |  | $ | 1 |  |  | $ | 1 |
Interest cost |  | 1 |  |  | 1 |  |  | 1 |  |  | 1 |
Expected return on plan assets |  | (3) |  |  | (3) |  |  | — |  |  | — |
Amortization of prior service cost (credit) |  | — |  |  | — |  |  | (1) |  |  | (1) |
Amortization of prior actuarial losses |  | 2 |  |  | 1 |  |  | 1 |  |  | 1 |
Net periodic benefit cost |  | $ | 5 |  |  | $ | 3 |  |  | $ | 2 |  |  | $ | 2 |
|  | Pension Benefits |  | Other Benefits
|  | Six months ended June 30, |  | Six months ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Service cost |  | $ | 9 |  |  | $ | 7 |  |  | $ | 2 |  |  | $ | 1 |
Interest cost |  | 2 |  |  | 3 |  |  | 1 |  |  | 2 |
Expected return on plan assets |  | (5) |  |  | (5) |  |  | — |  |  | — |
Amortization of prior service cost (credit) |  | — |  |  | — |  |  | (1) |  |  | (1) |
Amortization of prior actuarial losses |  | 3 |  |  | 2 |  |  | 1 |  |  | 1 |
Net periodic benefit cost |  | $ | 9 |  |  | $ | 7 |  |  | $ | 3 |  |  | $ | 3 |

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2439-114920 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2410-114920 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920 + Details
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