Acquisitions and Dispositions	12 Months Ended
Dec. 31, 2015
Acquisitions and Dispositions [Abstract]
Acquisitions and Dispositions	Note 3 – Acquisitions and Dispositions Proposed Merger On July 23, 2015, the Company entered into a merger agreement with Anthem, Inc. (“Anthem”) and Anthem Merger Sub Corp. (“Merger Sub”), a direct wholly owned subsidiary of Anthem. The merger agreement provides (a) for the merger of the Company and Merger Sub, with the Company continuing as the surviving corporation and (b) if certain tax opinions are delivered, immediately following the completion of the initial merger, for the surviving corporation to be merged with and into Anthem, with Anthem continuing as the surviving corporation (collectively, the “merger”). Subject to certain terms, conditions, and customary operating covenants, each share of Cigna common stock issued and outstanding immediately prior to the effective time of the merger will be converted into the right to receive (a) $103.40 in cash, without interest, and (b) 0.5152 of a share of Anthem common stock. The closing price of Anthem common stock on February 24, 2016 was $130.75. At special shareholders' meetings held in December 2015, Cigna shareholders approved the merger and Anthem shareholders approved the issuance of shares of Anthem common stock in connection with the merger. Completing the merger remains subject to certain customary conditions, including the receipt of certain necessary governmental and regulatory approvals and the absence of a legal restraint prohibiting the merger. Completing the merger is not subject to a financing condition. If the merger agreement is terminated under certain circumstances, Anthem will be required to pay Cigna a termination fee of $1.85 billion. Anthem's obligation to pay the termination fee arises if the merger agreement is terminated because: (1) a governmental entity, such as the Department of Justice or a state Department of Insurance, has prevented the merger for regulatory reasons and that decision is final and non-appealable; or (2) the merger has not closed by January 31, 2017 (subject to extension to April 30, 2017 under certain circumstances) only because all necessary regulatory approvals have not been received. The merger agreement contains customary covenants, including covenants that Cigna conduct its business in the ordinary course during the period between entering into the merger agreement and closing. In addition, Cigna's ability to take certain actions prior to closing without Anthem's consent is subject to certain limitations. These limitations relate to, among other matters, the payment of dividends, capital expenditures, the payment or retirement of indebtedness or the incurrence of new indebtedness, settlement of material claims or proceedings, mergers or acquisitions, and certain employment-related matters. The transaction is expected to close in the second half of 2016. For the year ended December 31, 2015, the Company incurred pre-tax costs of $66 million ($57 million after-tax) directly related to the proposed merger. These costs consisted primarily of fees for financial advisory, legal and other professional services. Acquisitions The Company completed certain acquisitions during the three years ended December 31, 2015. In accordance with GAAP, the purchase price for each acquisition was allocated to the tangible and intangible net assets acquired based on management's preliminary estimates of their fair values The results of acquisition activities for these years were not material to the Company's results of operations, liquidity or financial condition.

Acquisitions and Dispositions

12 Months Ended

Dec. 31, 2015

Acquisitions and Dispositions [Abstract]

Note 3 – Acquisitions and Dispositions

Proposed Merger

On July 23, 2015, the Company entered into a merger agreement with Anthem, Inc. (“Anthem”) and Anthem Merger Sub Corp. (“Merger Sub”), a direct wholly owned subsidiary of Anthem. The merger agreement provides (a) for the merger of the Company and Merger Sub, with the Company continuing as the surviving corporation and (b) if certain tax opinions are delivered, immediately following the completion of the initial merger, for the surviving corporation to be merged with and into Anthem, with Anthem continuing as the surviving corporation (collectively, the “merger”). Subject to certain terms, conditions, and customary operating covenants, each share of Cigna common stock issued and outstanding immediately prior to the effective time of the merger will be converted into the right to receive (a) $103.40 in cash, without interest, and (b) 0.5152 of a share of Anthem common stock. The closing price of Anthem common stock on February 24, 2016 was $130.75.

At special shareholders' meetings held in December 2015, Cigna shareholders approved the merger and Anthem shareholders approved the issuance of shares of Anthem common stock in connection with the merger. Completing the merger remains subject to certain customary conditions, including the receipt of certain necessary governmental and regulatory approvals and the absence of a legal restraint prohibiting the merger. Completing the merger is not subject to a financing condition.

If the merger agreement is terminated under certain circumstances, Anthem will be required to pay Cigna a termination fee of $1.85 billion. Anthem's obligation to pay the termination fee arises if the merger agreement is terminated because: (1) a governmental entity, such as the Department of Justice or a state Department of Insurance, has prevented the merger for regulatory reasons and that decision is final and non-appealable; or (2) the merger has not closed by January 31, 2017 (subject to extension to April 30, 2017 under certain circumstances) only because all necessary regulatory approvals have not been received.

The merger agreement contains customary covenants, including covenants that Cigna conduct its business in the ordinary course during the period between entering into the merger agreement and closing. In addition, Cigna's ability to take certain actions prior to closing without Anthem's consent is subject to certain limitations. These limitations relate to, among other matters, the payment of dividends, capital expenditures, the payment or retirement of indebtedness or the incurrence of new indebtedness, settlement of material claims or proceedings, mergers or acquisitions, and certain employment-related matters.

The transaction is expected to close in the second half of 2016.

For the year ended December 31, 2015, the Company incurred pre-tax costs of $66 million ($57 million after-tax) directly related to the proposed merger. These costs consisted primarily of fees for financial advisory, legal and other professional services.

Acquisitions

The Company completed certain acquisitions during the three years ended December 31, 2015. In accordance with GAAP, the purchase price for each acquisition was allocated to the tangible and intangible net assets acquired based on management's preliminary estimates of their fair values

The results of acquisition activities for these years were not material to the Company's results of operations, liquidity or financial condition.