Statutory Information	12 Months Ended
Dec. 31, 2018
Statutory Information [Abstract]
Statutory Information	Statutory Information The majority of our insurance and HMO subsidiaries report their accounts in conformity with accounting practices prescribed or permitted by state insurance regulatory authorities, commonly referred to as statutory accounting, which vary in certain respects from GAAP. However, certain of our insurance and HMO subsidiaries, including BCC, Blue Cross of California Partnership Plan, Inc., Golden West Health Plan, Inc. and CareMore Health Plan are regulated by the California Department of Managed Health Care, or DMHC, and report their accounts in conformity with GAAP (these entities are collectively referred to as the “DMHC regulated entities”). Typical differences of GAAP reporting as compared to statutory reporting are the inclusion of unrealized gains or losses relating to fixed maturity securities in shareholders’ equity, recognition of all assets including those that are non-admitted for statutory purposes and recognition of all deferred tax assets without regard to statutory limits. The National Association of Insurance Commissioners, or NAIC, developed a codified version of the statutory accounting principles, designed to foster more consistency among the states for accounting guidelines and reporting. Prescribed statutory accounting practices are set forth in a variety of publications of the NAIC as well as state laws, regulations and general administrative rules. Our ability to pay dividends and credit obligations is significantly dependent on receipt of dividends from our subsidiaries. The payment of dividends to us by our insurance and HMO subsidiaries without prior approval of the insurance departments of each subsidiary’s domiciliary jurisdiction is limited by formula. Dividends in excess of these amounts are subject to prior approval by the respective state insurance departments or the DMHC. Our statutory basis insurance and HMO subsidiaries are subject to risk-based capital, or RBC, requirements. RBC is a method developed by the NAIC to determine the minimum amount of statutory capital appropriate for an insurance company or HMO to support its overall business operations in consideration of its size and risk profile. The formula for determining the amount of RBC specifies various factors, weighted based on the perceived degree of risk, which are applied to certain financial balances and financial activity. Below minimum RBC requirements are classified within certain levels, each of which requires specified corrective action. Additionally, the DMHC regulated entities are subject to capital and solvency requirements as prescribed by the DMHC. As of December 31, 2018 and 2017, all of our regulated subsidiaries exceeded the minimum RBC requirements and/or capital and solvency requirements of their applicable governmental regulator. The statutory RBC necessary to satisfy regulatory requirements of our statutory basis insurance and HMO subsidiaries was approximately $4,800 and $4,700 as of December 31, 2018 and 2017, respectively. The tangible net equity required for the DMHC regulated entities was approximately $570 and $670 as of December 31, 2018 and 2017, respectively. Statutory-basis capital and surplus of our insurance and HMO subsidiaries and capital and surplus of our other regulated subsidiaries, excluding the DMHC regulated entities, was $12,038 and $11,666 at December 31, 2018 and 2017, respectively. Statutory-basis net income of our insurance and HMO subsidiaries and net income of our other regulated subsidiaries, excluding the DMHC regulated entities, was $3,412, $2,674 and $2,613 for 2018, 2017 and 2016, respectively. GAAP equity of the DMHC regulated entities was $3,125 and $2,917 at December 31, 2018 and 2017, respectively. GAAP net income of the DMHC regulated entities was $789, $1,047 and $775 for the years ended December 31, 2018, 2017 and 2016, respectively.

Statutory Information

The majority of our insurance and HMO subsidiaries report their accounts in conformity with accounting practices prescribed or permitted by state insurance regulatory authorities, commonly referred to as statutory accounting, which vary in certain respects from GAAP. However, certain of our insurance and HMO subsidiaries, including BCC, Blue Cross of California Partnership Plan, Inc., Golden West Health Plan, Inc. and CareMore Health Plan are regulated by the California Department of Managed Health Care, or DMHC, and report their accounts in conformity with GAAP (these entities are collectively referred to as the “DMHC regulated entities”). Typical differences of GAAP reporting as compared to statutory reporting are the inclusion of unrealized gains or losses relating to fixed maturity securities in shareholders’ equity, recognition of all assets including those that are non-admitted for statutory purposes and recognition of all deferred tax assets without regard to statutory limits. The National Association of Insurance Commissioners, or NAIC, developed a codified version of the statutory accounting principles, designed to foster more consistency among the states for accounting guidelines and reporting. Prescribed statutory accounting practices are set forth in a variety of publications of the NAIC as well as state laws, regulations and general administrative rules.

Our ability to pay dividends and credit obligations is significantly dependent on receipt of dividends from our subsidiaries. The payment of dividends to us by our insurance and HMO subsidiaries without prior approval of the insurance departments of each subsidiary’s domiciliary jurisdiction is limited by formula. Dividends in excess of these amounts are subject to prior approval by the respective state insurance departments or the DMHC.

Our statutory basis insurance and HMO subsidiaries are subject to risk-based capital, or RBC, requirements. RBC is a method developed by the NAIC to determine the minimum amount of statutory capital appropriate for an insurance company or HMO to support its overall business operations in consideration of its size and risk profile. The formula for determining the amount of RBC specifies various factors, weighted based on the perceived degree of risk, which are applied to certain financial balances and financial activity. Below minimum RBC requirements are classified within certain levels, each of which requires specified corrective action. Additionally, the DMHC regulated entities are subject to capital and solvency requirements as prescribed by the DMHC. As of December 31, 2018 and 2017, all of our regulated subsidiaries exceeded the minimum RBC requirements and/or capital and solvency requirements of their applicable governmental regulator. The statutory RBC necessary to satisfy regulatory requirements of our statutory basis insurance and HMO subsidiaries was approximately $4,800 and $4,700 as of December 31, 2018 and 2017, respectively. The tangible net equity required for the DMHC regulated entities was approximately $570 and $670 as of December 31, 2018 and 2017, respectively.

Statutory-basis capital and surplus of our insurance and HMO subsidiaries and capital and surplus of our other regulated subsidiaries, excluding the DMHC regulated entities, was $12,038 and $11,666 at December 31, 2018 and 2017, respectively. Statutory-basis net income of our insurance and HMO subsidiaries and net income of our other regulated subsidiaries, excluding the DMHC regulated entities, was $3,412, $2,674 and $2,613 for 2018, 2017 and 2016, respectively. GAAP equity of the DMHC regulated entities was $3,125 and $2,917 at December 31, 2018 and 2017, respectively. GAAP net income of the DMHC regulated entities was $789, $1,047 and $775 for the years ended December 31, 2018, 2017 and 2016, respectively.