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Retirement Plans (Tables) | 6 Months Ended
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Jun. 30, 2021
Retirement Plans [Abstract] |
Net Periodic Pension And OPEB Cost/(Benefit) | ‎ The components of our net periodic pension cost were as follows:
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
Millions | 2021 | 2020 |  | 2021 | 2020
Service cost | $ | 30 | $ | 26 |  | $ | 60 | $ | 53
Interest cost |  | 27 |  | 35 |  |  | 53 |  | 69
Expected return on plan assets |  | (68) |  | (70) |  |  | (135) |  | (140)
Amortization of actuarial loss |  | 35 |  | 24 |  |  | 71 |  | 52
Net periodic pension cost | $ | 24 | $ | 15 |  | $ | 49 | $ | 34
The components of our net periodic OPEB costs were as follows:
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
Millions | 2021 | 2020 |  | 2021 | 2020
Service cost | $ | 1 | $ | 1 |  | $ | 1 | $ | 1
Interest cost |  | 1 |  | 2 |  |  | 2 |  | 3
Amortization of: |  |  |  |  |  |  |  |  |
Prior service cost/(credit) |  | (3) |  | (4) |  |  | (7) |  | (7)
Actuarial loss |  | 1 |  | 2 |  |  | 3 |  | 4
Net periodic OPEB cost | $ | - | $ | 1 |  | $ | (1) | $ | 1
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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