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POSTRETIREMENT PLANS - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 24, 2017 | Sep. 25, 2016 | Sep. 24, 2017 | Sep. 25, 2016
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Recognition of previously deferred postretirement benefit plan amounts, before tax | $ 309,000,000 | $ 271,000,000 | $ 930,000,000 | $ 806,000,000
Recognition of previously deferred postretirement benefit plan amounts, net of tax | 200,000,000 | 175,000,000 | 602,000,000 | 521,000,000
Retiree medical and life insurance plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Recognition of previously deferred postretirement benefit plan amounts, before tax | 14,000,000 | 8,000,000 | 41,000,000 | 18,000,000
Qualified defined benefit pension plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Material contributions to qualified defined benefit pension plans | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for net period benefit cost (credit) of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e689-108580 + Details
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