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CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME |  |  |  |  |
Net income |  | $ 848 | $ 507 | $ 1,556 | $ 624
Other comprehensive income (loss) items: |  |  |  |  |
Foreign currency translation (losses) gains |  | (1) |  |  | 1
Unrealized gains (losses) on derivatives | [1] | (1) | 1 | (4) | 6
Pension and postretirement gains (losses) | [2] | 5 | (1) | 9 | 8
Reclassification of realized (gains) losses on derivatives | [3] | 1 | 1 | 3 | (1)
Other comprehensive income, net of tax |  | 4 | 1 | 8 | 14
Comprehensive income |  | $ 852 | $ 508 | $ 1,564 | $ 638
[1] | Net of tax of zero for the three months ended June 30, 2018, and 2017, and $1 and $(3) for the six months ended June 30, 2018, and 2017, respectively.
[2] | Net of tax of $(2) and $1 for the three months ended June 30, 2018, and 2017, respectively, and $(3) and $(4) for the six months ended June 30, 2018, and 2017, respectively.
[3] | Net of tax of zero for each of the three months ended June 30, 2018, and 2017, and $(1) and $1 for the six months ended June 30, 2018, and 2017, respectively.

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