Commitments and Contingencies	3 Months Ended
Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	12. 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 being 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 March 31, 2015, the aggregate amount related to quantifiable guarantees was $375 million and the aggregate amount related to indemnification agreements was $324 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 March 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 March 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 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, with expected delivery in the first quarter of 2016. 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. Diamond Offshore expects to take delivery of an ultra-deepwater drillship in the second quarter of 2015 and will pay the remaining contractual payment to Hyundai of approximately $395 million at that time. In July of 2014, Diamond Offshore was notified by Petróleo Brasileiro S.A., (“Petrobras”) that it is challenging assessments by Brazilian tax authorities of withholding taxes associated with the provision of drilling rigs for its operations in Brazil during the years 2008 and 2009. If Petrobras is ultimately assessed such withholding taxes, it will seek reimbursement from Diamond Offshore for the portion allocable to its drilling rigs. Diamond Offshore disputes any basis for Petrobras to obtain such reimbursement and has notified Petrobras of its position and intends to pursue all legal remedies available to defend any reimbursement claims against it vigorously. Diamond Offshore is currently unable to estimate the range of loss, if any, that it would incur if Petrobras is ultimately assessed such taxes and if it is determined that Petrobras is entitled to obtain reimbursement from Diamond Offshore. However, if Diamond Offshore’s position is not sustained, the amount of such reimbursement could have a material adverse effect on its financial condition and the Company’s results of operations and cash flows.

12. 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 being 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 March 31, 2015, the aggregate amount related to quantifiable guarantees was $375 million and the aggregate amount related to indemnification agreements was $324 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 March 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 March 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

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, with expected delivery in the first quarter of 2016. 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.

Diamond Offshore expects to take delivery of an ultra-deepwater drillship in the second quarter of 2015 and will pay the remaining contractual payment to Hyundai of approximately $395 million at that time.

In July of 2014, Diamond Offshore was notified by Petróleo Brasileiro S.A., (“Petrobras”) that it is challenging assessments by Brazilian tax authorities of withholding taxes associated with the provision of drilling rigs for its operations in Brazil during the years 2008 and 2009. If Petrobras is ultimately assessed such withholding taxes, it will seek reimbursement from Diamond Offshore for the portion allocable to its drilling rigs. Diamond Offshore disputes any basis for Petrobras to obtain such reimbursement and has notified Petrobras of its position and intends to pursue all legal remedies available to defend any reimbursement claims against it vigorously. Diamond Offshore is currently unable to estimate the range of loss, if any, that it would incur if Petrobras is ultimately assessed such taxes and if it is determined that Petrobras is entitled to obtain reimbursement from Diamond Offshore. However, if Diamond Offshore’s position is not sustained, the amount of such reimbursement could have a material adverse effect on its financial condition and the Company’s results of operations and cash flows.