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Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 28, 2020 | Mar. 30, 2019
Statement of Comprehensive Income [Abstract] |  |
Net income | $ 350 | $ 285
Other comprehensive income (loss), pre-tax: |  |
Foreign currency translation adjustments, pre-tax | (241) | 66
Cash flow hedges, pre-tax: |  |
Unrealized gain (loss) on cash flow hedges, pre-tax | (65) |
Reclassification to net income, pre-tax | 2 | 1
Postretirement and postemployment benefits reclassification to net income, pre-tax: |  |
Net experience (gain) loss | (1) | (1)
Available-for-sale securities, pre-tax |  |
Unrealized gain (loss) on available-for-sale securities, pre-tax | (3) | 2
Other comprehensive income (loss), pre-tax | (308) | 68
Other comprehensive income (loss), tax (expense) benefit |  |
Foreign currency translation adjustments, tax (expense) benefit | (20) | (10)
Cash flow hedges, tax (expense) benefit: |  |
Unrealized gain (loss) on cash flow hedges, tax (expense) benefit | 17 |
Reclassification to net income, tax (expense) benefit | 0 | 0
Postretirement and postemployment benefits reclassification to net income, tax (expense) benefit: |  |
Net experience loss, tax (expense) benefit | 0 | 0
Available-for-sale securities, tax (expense) benefit |  |
Unrealized gain (loss) on available-for-sale securities, tax (expense) benefit | 0 | 0
Other comprehensive income (loss), tax (expense) benefit | (3) | (10)
Other comprehensive income (loss), after tax: |  |
Foreign currency translation adjustments, after-tax | (261) | 56
Cash flow hedges, after tax |  |
Unrealized gain (loss) on cash flow hedges, after-tax | (48) |
Reclassification to net income, after-tax | 2 | 1
Postretirement and postemployment benefits reclassification to net income, after-tax: |  |
Net experience (gain) loss, after-tax | (1) | (1)
Available-for-sale securities, after tax |  |
Unrealized gain (loss) on available-for-sale securities, after-tax | (3) | 2
Other comprehensive income (loss) | (311) | 58
Comprehensive income | 39 | 343
Net income attributable to noncontrolling interests | 3 | 3
Other comprehensive income (loss) attributable to noncontrolling interests | (32) | 3
Comprehensive income attributable to Kellogg Company | $ 68 | $ 337

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