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Employee Benefit Plans (Tables) | 6 Months Ended
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Jun. 26, 2015
Compensation and Retirement Disclosure [Abstract] |
Components of Expense/(Income) Related to Net Benefit Expense | The following table describes the components of expense / (income) related to net benefit expense recorded in labor and fringe on the income statement. NOTE 6. Employee Benefit Plans, continued
| Pension Benefits
(Dollars in millions) | Second Quarters |  | Six Months
| 2015 | 2014 |  | 2015 | 2014
Service Cost | $ | 11 |  | $ | 11 |  |  | $ | 22 |  | $ | 22 |
Interest Cost | 29 |  | 31 |  |  | 58 |  | 62 |
Expected Return on Plan Assets | (41 | ) | (42 | ) |  | (81 | ) | (83 | )
Amortization of Net Loss | 18 |  | 14 |  |  | 35 |  | 28 |
Net Periodic Benefit Cost | 17 |  | 14 |  |  | 34 |  | 29 |
Special Termination Employee Benefits(a) | — |  | — |  |  | 7 |  | — |
Total Expense | $ | 17 |  | $ | 14 |  |  | $ | 41 |  | $ | 29 |
| Other Post-retirement Benefits
(Dollars in millions) | Second Quarters |  | Six Months
| 2015 | 2014 |  | 2015 | 2014
Service Cost | $ | — |  | $ | — |  |  | $ | 1 |  | $ | 1 |
Interest Cost | 3 |  | 4 |  |  | 7 |  | 7 |
Amortization of Net Loss | 1 |  | 2 |  |  | 2 |  | 3 |
Amortization of Prior Service Costs | — |  | (1 | ) |  | — |  | (1 | )
Total Expense | $ | 4 |  | $ | 5 |  |  | $ | 10 |  | $ | 10 |
(a) These charges result from a management workforce reduction program that was initiated in 2014 and was completed during the first quarter 2015.

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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