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Pension and Other Postretirement Benefit Plans (Tables) | 6 Months Ended
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Apr. 01, 2017
Compensation and Retirement Disclosure [Abstract] |
Schedule of Net Benefit Costs | The components of the net periodic cost for the pension and postretirement benefit plans for the three and six months ended April 1, 2017, and April 2, 2016, are as follows (in millions):
| Pension Plans
| Three Months Ended |  | Six Months Ended
| April 1, 2017 |  | April 2, 2016 |  | April 1, 2017 |  | April 2, 2016
Service cost | $ | 3 |  |  | $ | 3 |  |  | $ | 6 |  |  | $ | 7 |
Interest cost | 16 |  |  | 18 |  |  | 32 |  |  | 38 |
Expected return on plan assets | (14 | ) |  | (16 | ) |  | (29 | ) |  | (33 | )
Amortization of: |  |  |  |  |  |  |
Net actuarial loss | 2 |  |  | 2 |  |  | 4 |  |  | 3 |
Settlement (gain) loss (a) | 2 |  |  | — |  |  | 2 |  |  | (12 | )
Net periodic cost | $ | 9 |  |  | $ | 7 |  |  | $ | 15 |  |  | $ | 3 |
| Postretirement Benefit Plans
| Three Months Ended |  | Six Months Ended
| April 1, 2017 |  | April 2, 2016 |  | April 1, 2017 |  | April 2, 2016
Interest cost | $ | 1 |  |  | $ | 1 |  |  | $ | 1 |  |  | $ | 2 |
Amortization of: |  |  |  |  |  |  |
Net actuarial gain | — |  |  | (9 | ) |  | — |  |  | (9 | )
Prior service credit | (6 | ) |  | (5 | ) |  | (12 | ) |  | (9 | )
Net periodic cost (credit) | $ | (5 | ) |  | $ | (13 | ) |  | $ | (11 | ) |  | $ | (16 | )
(a) We made lump-sum settlement payments using plan assets of $5 million and $265 million for the six months ended April 1, 2017 and April 2, 2016, respectively, to certain deferred vested participants within our qualified pension plans.

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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=65897934&loc=d3e1928-114920 + Details
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