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Other Comprehensive Income / (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Comprehensive earnings |  | $ 3,134 | $ 5,625 | $ 1,739
Other Comprehensive Income (Loss): |  |  |  |
Reclassification of Stranded Tax Effects |  | (107) |  |
(Loss) Income Before Reclassifications |  | (119) | 161 | (13)
Amounts Reclassified to Net Earnings |  | 32 | 58 | 51
Tax (Expense) Benefit |  | 19 | (65) | (13)
Total Other Comprehensive Loss |  | (175) | 154 | 25
Pension and Other Post-Employment Benefits |  |  |  |
Other Comprehensive Income (Loss): |  |  |  |
Beginning Balance |  | (440) | (580) | (601)
Reclassification of Stranded Tax Effects |  | (108) |  |
(Loss) Income Before Reclassifications |  | (111) | 148 | (16)
Amounts Reclassified to Net Earnings |  | 38 | 56 | 50
Tax (Expense) Benefit |  | 17 | (64) | (13)
Total Other Comprehensive Loss |  | (164) | 140 | 21
Ending Balance |  | (604) | (440) | (580)
Other |  |  |  |
Other Comprehensive Income (Loss): |  |  |  |
Beginning Balance |  | (46) | (60) | (64)
Reclassification of Stranded Tax Effects |  | 1 |  |
(Loss) Income Before Reclassifications |  | (8) | 13 | 3
Amounts Reclassified to Net Earnings |  | (6) | 2 | 1
Tax (Expense) Benefit |  | 2 | (1) | 0
Total Other Comprehensive Loss |  | (11) | 14 | 4
Ending Balance |  | (57) | (46) | (60)
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Other Comprehensive Income (Loss): |  |  |  |
Beginning Balance |  | (486) | (640) | (665)
Tax (Expense) Benefit |  | (180) | (162) | (335)
Total Other Comprehensive Loss | [1] | (175) | 154 | 25
Ending Balance |  | $ (661) | $ (486) | $ (640)
[1] | Accumulated Other Comprehensive Loss year-end balances shown above are net of tax. The associated taxes were $180 million, $162 million and $335 million for 2018, 2017 and 2016, respectively. For additional information see Note 14, Other Comprehensive Income.

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