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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Nov. 10, 2018 | Nov. 04, 2017 | Nov. 10, 2018 | Nov. 04, 2017
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME |  |  |  |
Realized gains and losses on available for sale securities, income tax |  |  | $ (1) |
Change in pension and other postretirement defined benefit plans, income tax | $ 3 | $ 5 | 10 | $ 19
Unrealized gains and losses on cash flow hedging activities, income tax | 11 | 5 | 10 | (15)
Amortization of unrealized gains and losses on cash flow hedging activities, income tax | $ 1 | $ 1 | $ 3 | $ 2

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