Commitments and Contingencies	12 Months Ended
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 18. Commitments and Contingencies CNA Financial In the course of selling business entities and assets to third parties, CNA agreed to guarantee the performance of certain obligations of a previously owned subsidiary and to indemnify purchasers for losses arising out of breaches of representation and warranties with respect to the business entities or assets sold, including, in certain cases, losses arising from undisclosed liabilities or certain named litigation. Such guarantee and indemnification agreements in effect for sales of business entities, assets and third party loans may include provisions that survive indefinitely. As of December 31, 2015, the aggregate amount related to quantifiable guarantees was $375 million and the aggregate amount related to indemnification agreements was $260 million. Should CNA be required to make payments under the guarantee, it would have the right to seek reimbursement in certain cases from an affiliate of a previously owned subsidiary. In addition, CNA has agreed to provide indemnification to third-party purchasers for certain losses associated with sold business entities or assets that are not limited by a contractual monetary amount. As of December 31, 2015, CNA had outstanding unlimited indemnifications in connection with the sales of certain of its business entities or assets that included tax liabilities arising prior to a purchaser’s ownership of an entity or asset, defects in title at the time of sale, employee claims arising prior to closing and in some cases losses arising from certain litigation and undisclosed liabilities. Certain provisions of the indemnification agreements survive indefinitely, while others survive until the applicable statutes of limitation expire, or until the agreed upon contract terms expire. In the normal course of business, CNA also provided guarantees, if the primary obligor fails to perform, to holders of structured settlement annuities provided by a previously owned subsidiary, which are estimated to mature through 2120. The potential amount of future payments CNA could be required to pay under these guarantees was approximately $2.0 billion as of December 31, 2015. CNA does not believe a payable is likely under these guarantees, as CNA is the beneficiary of a trust that must be maintained at a level that approximates the discounted reserves for these annuities. Diamond Offshore In February of 2016, Diamond Offshore entered into a ten-year agreement with GE Oil & Gas (“GE”) to provide services with respect to certain blowout preventer and related well control equipment on its four newbuild drillships. Such services include management of maintenance, certification and reliability with respect to such equipment. In connection with the services agreement with GE, Diamond Offshore will sell the equipment to a GE affiliate for an aggregate $210 million and will lease back such equipment over separate ten-year operating leases. Diamond Offshore does not expect to realize any gain or loss on these sale and leaseback transactions. Future commitments for the full term under the services agreement and leases are estimated to aggregate approximately $650 million. Diamond Offshore is financially obligated under a contract with Hyundai Heavy Industries, Co. Ltd. (“Hyundai”) for the construction of a dynamically positioned, harsh environment semisubmersible drilling rig. The total cost of the rig including shipyard costs, capital spares, commissioning, project management and shipyard supervision is estimated to be $764 million. The remaining contractual payment of $440 million is due upon delivery of the rig, which is expected to occur in mid-2016.

Note 18. Commitments and Contingencies

CNA Financial

In the course of selling business entities and assets to third parties, CNA agreed to guarantee the performance of certain obligations of a previously owned subsidiary and to indemnify purchasers for losses arising out of breaches of representation and warranties with respect to the business entities or assets sold, including, in certain cases, losses arising from undisclosed liabilities or certain named litigation. Such guarantee and indemnification agreements in effect for sales of business entities, assets and third party loans may include provisions that survive indefinitely. As of December 31, 2015, the aggregate amount related to quantifiable guarantees was $375 million and the aggregate amount related to indemnification agreements was $260 million. Should CNA be required to make payments under the guarantee, it would have the right to seek reimbursement in certain cases from an affiliate of a previously owned subsidiary.

In addition, CNA has agreed to provide indemnification to third-party purchasers for certain losses associated with sold business entities or assets that are not limited by a contractual monetary amount. As of December 31, 2015, CNA had outstanding unlimited indemnifications in connection with the sales of certain of its business entities or assets that included tax liabilities arising prior to a purchaser’s ownership of an entity or asset, defects in title at the time of sale, employee claims arising prior to closing and in some cases losses arising from certain litigation and undisclosed liabilities. Certain provisions of the indemnification agreements survive indefinitely, while others survive until the applicable statutes of limitation expire, or until the agreed upon contract terms expire.

In the normal course of business, CNA also provided guarantees, if the primary obligor fails to perform, to holders of structured settlement annuities provided by a previously owned subsidiary, which are estimated to mature through 2120. The potential amount of future payments CNA could be required to pay under these guarantees was approximately $2.0 billion as of December 31, 2015. CNA does not believe a payable is likely under these guarantees, as CNA is the beneficiary of a trust that must be maintained at a level that approximates the discounted reserves for these annuities.

Diamond Offshore

In February of 2016, Diamond Offshore entered into a ten-year agreement with GE Oil & Gas (“GE”) to provide services with respect to certain blowout preventer and related well control equipment on its four newbuild drillships. Such services include management of maintenance, certification and reliability with respect to such equipment. In connection with the services agreement with GE, Diamond Offshore will sell the equipment to a GE affiliate for an aggregate $210 million and will lease back such equipment over separate ten-year operating leases. Diamond Offshore does not expect to realize any gain or loss on these sale and leaseback transactions. Future commitments for the full term under the services agreement and leases are estimated to aggregate approximately $650 million.

Diamond Offshore is financially obligated under a contract with Hyundai Heavy Industries, Co. Ltd. (“Hyundai”) for the construction of a dynamically positioned, harsh environment semisubmersible drilling rig. The total cost of the rig including shipyard costs, capital spares, commissioning, project management and shipyard supervision is estimated to be $764 million. The remaining contractual payment of $440 million is due upon delivery of the rig, which is expected to occur in mid-2016.