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RECENT ACCOUNTING PRONOUNCEMENTS - Effect of Topic 606 and ASU 2017-07 Adoption on Cash Flows Statement (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 25, 2018 | Mar. 26, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Operating activities |  |  |  |
Net earnings | $ 1,157 | $ 789 |  |
Adjustments to reconcile net earnings to net cash provided by operating activities |  |  |  |
Depreciation and amortization | 279 | 285 |  |
Stock-based compensation | 38 | 44 |  |
Changes in assets and liabilities |  |  |  |
Receivables, net | (108) | (799) |  |
Contract assets | (1,413) | (62) |  |
Inventories | (318) | (225) |  |
Accounts payable | 1,290 | 1,111 |  |
Contract liabilities | (478) | (185) |  |
Postretirement benefit plans | (1,145) | 345 |  |
Income taxes | 1,064 | 175 |  |
Other, net | 266 | 188 |  |
Net cash provided by operating activities | $ 632 | 1,666 |  |
Historical |  |  |  |
Operating activities |  |  |  |
Net earnings |  | 763 |  |
Adjustments to reconcile net earnings to net cash provided by operating activities |  |  |  |
Depreciation and amortization |  | 285 |  |
Stock-based compensation |  | 44 |  |
Changes in assets and liabilities |  |  |  |
Receivables, net |  | (667) |  |
Contract assets |  | 0 |  |
Inventories |  | (404) |  |
Accounts payable |  | 1,111 |  |
Contract liabilities |  | (204) |  |
Postretirement benefit plans |  | 345 |  |
Income taxes |  | 175 |  |
Other, net |  | 218 |  |
Net cash provided by operating activities |  | 1,666 |  |
Adjustments for | ASC 606 |  |  |  |
Operating activities |  |  |  |
Net earnings |  | 26 | $ (39) | $ (92)
Adjustments to reconcile net earnings to net cash provided by operating activities |  |  |  |
Depreciation and amortization |  | 0 |  |
Stock-based compensation |  | 0 |  |
Changes in assets and liabilities |  |  |  |
Receivables, net |  | (132) |  |
Contract assets |  | (62) |  |
Inventories |  | 179 |  |
Accounts payable |  | 0 |  |
Contract liabilities |  | 19 |  |
Postretirement benefit plans |  | 0 |  |
Income taxes |  | 0 |  |
Other, net |  | (30) |  |
Net cash provided by operating activities |  | $ 0 |  |

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