Accumulated Other Comprehensive Income (Loss. Comprehensive income (loss) is comprised of net income and other comprehensive income (loss). Other comprehensive income (loss) includes net unrealized gains or losses resulting from currency translations of foreign subsidiaries.
Accumulated Other Comprehensive Income (Loss. Changes, net of tax, in accumulated other comprehensive income (loss) were as follows: (dollars in millions) Unrealized Gains (Losses) Available-for-Sale Securities Retirement Plan Liabilities Adjustments Foreign Currency Translation Adjustments Total Accumulated Other Comprehensive Income (Loss) Year Ended December 31, 2017 Balance at beginning of period $ (1 ) $ (4 ) $ (1 ) $ (6 ) Other comprehensive income before reclassifications 14 3 4 21 Reclassification adjustments from accumulated other comprehensive loss (9 ) — — (9 ) Balance at end of period $ 4 $ (1 ) $ 3 $ 6 Year Ended December 31, 2016 Balance at beginning of period $ (14 ) $ (19 ) $ — $ (33 ) Other comprehensive income before reclassifications 23 15 3 41 Reclassification adjustments from accumulated other comprehensive loss (10 ) — (4 ) (14 ) Balance at end of period $ (1 ) $ (4 ) $ (1 ) $ (6 ) Year Ended December 31, 2015 Balance at beginning of period $ 12 $ (13 ) $ 4 $ 3 Other comprehensive loss before reclassifications (18 ) (6 ) (4 ) (28 ) Reclassification adjustments from accumulated other comprehensive loss (8 ) — — (8 ) Balance at end of period $ (14 ) $ (19 ) $ — $ (33 ) Reclassification adjustments from accumulated other comprehensive income (loss) to the applicable line item on our consolidated statements of operations were as follows: (dollars in millions) Years Ended December 31, 2017 2016 2015 Unrealized gains on investment securities: Reclassification from accumulated other comprehensive income (loss) to investment revenues, before taxes $ 14 $ 15 $ 12 Income tax effect (5 ) (5 ) (4 ) Reclassification from accumulated other comprehensive income (loss) to investment revenues, net of taxes 9 10 8 Unrealized gains on foreign currency translation adjustments: Reclassification from accumulated other comprehensive income (loss) to other revenues — 4 — Total $ 9 $ 14 $ 8 106
