[1]	At both June 30, 2018 and December 31, 2017, we held securities for which we previously recognized an immaterial amount of non-credit related impairments in accumulated other comprehensive loss. These securities had an immaterial amount of net unrealized capital gains at both June 30, 2018 and December 31, 2017.
[2]	Investment risks associated with our experience-rated and discontinued products generally do not impact our operating results (refer to Note 16 for additional information on our accounting for discontinued products). At June 30, 2018, debt securities with a fair value of approximately $2.4 billion, gross unrealized capital gains of $88 million and gross unrealized capital losses of $62 million and, at December 31, 2017, debt securities with a fair value of approximately $2.6 billion, gross unrealized capital gains of $199 million and gross unrealized capital losses of $8 million were included in total debt securities, but support our experience-rated and discontinued products. Changes in net unrealized capital gains (losses) on these securities are not reflected in accumulated other comprehensive income.
[3]	It was not practical to estimate the fair value of these cost-method investments as it represents shares of unlisted companies.

AETNA INC /PA/ 10-Q