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STOCKHOLDERS' EQUITY - Schedule of Changes in the Balance of AOCL, Net of Tax (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 25, 2018 | Mar. 26, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax |  |
Beginning Balance | $ (776) | $ 1,477
Other comprehensive income before reclassifications | 55 | 7
Total reclassified from AOCL | 303 | 203
Other comprehensive income, net of tax | 358 | 210
Reclassification of income tax effects from tax reform | 2,400 |
Ending Balance | (111) | 1,482
Postretirement Benefit Plans |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax |  |
Beginning Balance | (12,559) | (11,981)
Other comprehensive income before reclassifications | 0 | 3
Total reclassified from AOCL | 300 | 202
Other comprehensive income, net of tax | 300 | 205
Reclassification of income tax effects from tax reform | (2,396) |
Ending Balance | (14,655) | (11,776)
Other, net |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax |  |
Beginning Balance | 20 | (121)
Other comprehensive income before reclassifications | 55 | 4
Total reclassified from AOCL | 3 | 1
Other comprehensive income, net of tax | 58 | 5
Reclassification of income tax effects from tax reform | (12) |
Ending Balance | 66 | (116)
AOCL |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax |  |
Beginning Balance | (12,539) | (12,102)
Other comprehensive income, net of tax | 358 | 210
Reclassification of income tax effects from tax reform | (2,408) |
Ending Balance | (14,589) | (11,892)
Recognition of net actuarial losses |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax |  |
Total reclassified from AOCL | 364 | 258
Amortization of net prior service credits |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax |  |
Total reclassified from AOCL | (64) | (56)
Other |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax |  |
Total reclassified from AOCL | $ 3 | $ 1

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