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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Statement of Comprehensive Income [Abstract] |  |  |
Net income | $ 1,791 | $ 1,721 | $ 1,652
Other comprehensive income (loss): |  |  |
Net unrealized derivative instruments gains (losses) arising during the periods, net of income taxes of $35, ($11) and ($9), respectively | 103 |  |
Net unrealized derivative instruments gains (losses) arising during the periods, net of income taxes of $35, ($11) and ($9), respectively, before 2017-12 adoption |  | (33) | (14)
Reclassification adjustment for net derivative losses (gains) included in net income, net of income taxes of $14, $10 and ($9), respectively | 43 |  |
Reclassification adjustment for net derivative losses (gains) included in net income, net of income taxes of $14, $10 and ($9), respectively, before 2017-12 adoption |  | 33 | (16)
Net unrealized debt securities gains (losses) arising during the periods, net of income taxes of $165, ($79) and ($4), respectively | 501 | (239) | (6)
Other-than-temporary impairment not recognized in earnings on debt securities, net of income taxes of $0, ($1) and $0, respectively | 0 | (3) | 0
Reclassification of net debt securities gains to net income, net of income taxes of ($8), ($4) and ($2), respectively | (15) | (12) | (2)
Employee benefit plans: |  |  |
Actuarial gain (loss), net of income taxes of $12, ($14) and $12, respectively | 36 | (35) | 19
Amortization of actuarial loss, net of income taxes of $6, $3 and $5, respectively | 13 | 14 | 13
Amortization of prior service cost, net of income taxes of $0, $0 and $0, respectively | (1) | (1) | (1)
Total other comprehensive income (loss), net of income taxes | 680 | (276) | (7)
Total comprehensive income | $ 2,471 | $ 1,445 | $ 1,645

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