Income Taxes	6 Months Ended
Jun. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes [Text Block]	Income Taxes The Company’s effective tax rate was 18.4% and 22.6% for the three months ended June 30, 2016 and 2015, respectively. The Company’s effective tax rate was 21.0% and 22.6% for the six months ended June 30, 2016 and 2015, respectively. The Company’s effective tax rates for the three months and six months ended June 30, 2016 are lower than the statutory rate as a result of tax preferred items including the dividends received deduction, low income housing tax credits, and lower taxes on net income from foreign subsidiaries. The decrease in the effective tax rate for the three months and six months ended June 30, 2016 compared to the prior year periods was primarily due to a $17 million benefit in the second quarter of 2016 primarily related to the completion of tax audits from previous years. Included in the Company’s deferred income tax assets are tax benefits related to state net operating losses of $15 million, net of federal benefit, which will expire beginning December 31, 2016. The Company is required to establish a valuation allowance for any portion of the deferred tax assets that management believes will not be realized. Included in deferred tax assets is a significant deferred tax asset relating to capital losses that have been recognized for financial statement purposes but not yet for tax return purposes. Under current U.S. federal income tax law, capital losses generally must be used against capital gain income within five years of the year in which the capital losses are recognized for tax purposes. Significant judgment is required in determining if a valuation allowance should be established, and the amount of such allowance if required. Factors used in making this determination include estimates relating to the performance of the business. Consideration is given to, among other things in making this determination, (i) future taxable income exclusive of reversing temporary differences and carryforwards, (ii) future reversals of existing taxable temporary differences, (iii) taxable income in prior carryback years, and (iv) tax planning strategies. Based on analysis of the Company’s tax position, management believes it is more likely than not that the Company will not realize certain state deferred tax assets and state net operating losses and therefore a valuation allowance has been established. The valuation allowance was $11 million at both June 30, 2016 and December 31, 2015. As of June 30, 2016 and December 31, 2015, the Company had $119 million and $161 million, respectively, of gross unrecognized tax benefits. If recognized, approximately $50 million and $57 million, net of federal tax benefits, of unrecognized tax benefits at June 30, 2016 and December 31, 2015, respectively, would affect the effective tax rate. It is reasonably possible that the total amounts of unrecognized tax benefits will change in the next 12 months. The Company estimates that the total amount of gross unrecognized tax benefits may decrease by $60 million to $70 million in the next 12 months primarily due to resolution of IRS examinations. The Company recognizes interest and penalties related to unrecognized tax benefits as a component of the income tax provision. The Company recognized nil and a net decrease of $44 million in interest and penalties for the three months and six months ended June 30, 2016, respectively. The Company recognized a net increase of $1 million and $2 million in interest and penalties for the three months and six months ended June 30, 2015, respectively. At June 30, 2016 and December 31, 2015, the Company had a payable of $7 million and $51 million, respectively, related to accrued interest and penalties. The Company or one or more of its subsidiaries files income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. The IRS has completed its field examination of the 1997 through 2011 tax returns. However, for federal income tax purposes, tax years 1997 through 2006, 2008, and 2009 remain open for certain unagreed-upon issues. The IRS is currently auditing the Company’s U.S. Income Tax Returns for 2012 and 2013. The Company’s or certain of its subsidiaries’ state income tax returns are currently under examination by various jurisdictions for years ranging from 1997 through 2012 and remain open for all years after 2012.

Income Taxes

The Company’s effective tax rate was 18.4% and 22.6% for the three months ended June 30, 2016 and 2015, respectively. The Company’s effective tax rate was 21.0% and 22.6% for the six months ended June 30, 2016 and 2015, respectively. The Company’s effective tax rates for the three months and six months ended June 30, 2016 are lower than the statutory rate as a result of tax preferred items including the dividends received deduction, low income housing tax credits, and lower taxes on net income from foreign subsidiaries. The decrease in the effective tax rate for the three months and six months ended June 30, 2016 compared to the prior year periods was primarily due to a $17 million benefit in the second quarter of 2016 primarily related to the completion of tax audits from previous years.

Included in the Company’s deferred income tax assets are tax benefits related to state net operating losses of $15 million, net of federal benefit, which will expire beginning December 31, 2016.

The Company is required to establish a valuation allowance for any portion of the deferred tax assets that management believes will not be realized. Included in deferred tax assets is a significant deferred tax asset relating to capital losses that have been recognized for financial statement purposes but not yet for tax return purposes. Under current U.S. federal income tax law, capital losses generally must be used against capital gain income within five years of the year in which the capital losses are recognized for tax purposes. Significant judgment is required in determining if a valuation allowance should be established, and the amount of such allowance if required. Factors used in making this determination include estimates relating to the performance of the business. Consideration is given to, among other things in making this determination, (i) future taxable income exclusive of reversing temporary differences and carryforwards, (ii) future reversals of existing taxable temporary differences, (iii) taxable income in prior carryback years, and (iv) tax planning strategies. Based on analysis of the Company’s tax position, management believes it is more likely than not that the Company will not realize certain state deferred tax assets and state net operating losses and therefore a valuation allowance has been established. The valuation allowance was $11 million at both June 30, 2016 and December 31, 2015.

As of June 30, 2016 and December 31, 2015, the Company had $119 million and $161 million, respectively, of gross unrecognized tax benefits. If recognized, approximately $50 million and $57 million, net of federal tax benefits, of unrecognized tax benefits at June 30, 2016 and December 31, 2015, respectively, would affect the effective tax rate.

It is reasonably possible that the total amounts of unrecognized tax benefits will change in the next 12 months. The Company estimates that the total amount of gross unrecognized tax benefits may decrease by $60 million to $70 million in the next 12 months primarily due to resolution of IRS examinations.

The Company recognizes interest and penalties related to unrecognized tax benefits as a component of the income tax provision. The Company recognized nil and a net decrease of $44 million in interest and penalties for the three months and six months ended June 30, 2016, respectively. The Company recognized a net increase of $1 million and $2 million in interest and penalties for the three months and six months ended June 30, 2015, respectively. At June 30, 2016 and December 31, 2015, the Company had a payable of $7 million and $51 million, respectively, related to accrued interest and penalties.

The Company or one or more of its subsidiaries files income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. The IRS has completed its field examination of the 1997 through 2011 tax returns. However, for federal income tax purposes, tax years 1997 through 2006, 2008, and 2009 remain open for certain unagreed-upon issues. The IRS is currently auditing the Company’s U.S. Income Tax Returns for 2012 and 2013. The Company’s or certain of its subsidiaries’ state income tax returns are currently under examination by various jurisdictions for years ranging from 1997 through 2012 and remain open for all years after 2012.