| **Consolidated Statements of Cash Flows - USD ($) $ in Millions**                           | 12 Months Ended |
|---------------------------------------------------------------------------------------------|-----------------|
||
| **Cash Flows from Operating Activities**                                                    |            |   |   |
| Net income                                                                                  | $ 1,000         | $ 813 | $ 899 |
| **Adjustments to reconcile net income to net cash flows provided by operating activities:** |            |   |   |
| Deferred Income Tax Expense (Benefit)                                                       | (46)            | (20) | 168 |
| Trading portfolio activity                                                                  | (16)            | 0 | 9 |
| Net investment (gains) losses                                                               | (29)            | 52 | (93) |
| Equity method investees                                                                     | 11              | 330 | 84 |
| Net amortization of investments                                                             | (89)            | (70) | (40) |
| Depreciation and amortization                                                               | 68              | 79 | 88 |
| **Changes in:**                                                                             |            |   |   |
| Receivables, net                                                                            | 137             | (229) | 92 |
| Accrued investment income                                                                   | (3)             | 19 | (4) |
| Deferred acquisition costs                                                                  | (26)            | (6) | (24) |
| Insurance reserves                                                                          | 358             | 482 | 22 |
| Other, net                                                                                  | (225)           | (223) | 53 |
| Net cash flows provided by operating activities                                             | 1,140           | 1,227 | 1,254 |
| **Dispositions:**                                                                           |            |   |   |
| Fixed maturity securities - sales                                                           | 5,842           | 8,408 | 5,438 |
| Fixed maturity securities - maturities, calls and redemptions                               | 2,997           | 2,370 | 3,641 |
| Equity securities                                                                           | 214             | 89 | 46 |
| Limited partnerships                                                                        | 479             | 343 | 192 |
| Mortgage loans                                                                              | 143             | 128 | 26 |
| **Purchases:**                                                                              |            |   |   |
| Fixed maturity securities                                                                   | (8,661)         | (10,785) | (9,065) |
| Equity securities                                                                           | (186)           | (258) | (166) |
| Limited partnerships                                                                        | (198)           | (419) | (171) |
| Mortgage loans                                                                              | (298)           | (128) | (274) |
| Change in other investments                                                                 | (11)            | (12) | (3) |
| Change in short term investments                                                            | (535)           | 168 | (6) |
| Purchases of property and equipment                                                         | (26)            | (99) | (102) |
| Other, net                                                                                  | 15              | 18 | 20 |
| Net cash flows used by investing activities                                                 | (225)           | (177) | (424) |
| **Cash Flows from Financing Activities**                                                    |            |   |   |
| Dividends paid to common stockholders                                                       | (929)           | (896) | (842) |
| Proceeds from the issuance of debt                                                          | 496             | 0 | 496 |
| Repayment of debt                                                                           | (520)           | (180) | (391) |
| Purchase of treasury stock                                                                  | (23)            | 0 | 0 |
| Other, net                                                                                  | (12)            | (9) | (18) |
| Net cash flows used by financing activities                                                 | (988)           | (1,085) | (755) |
| Effect of foreign exchange rate changes on cash                                             | 5               | (10) | 9 |
| Net change in cash                                                                          | (68)            | (45) | 84 |
| Cash, beginning of year                                                                     | 310             | 355 | 271 |
| Cash, end of period                                                                         | $ 242           | $ 310 | $ 355 |

| X                                                                                                                                                                                                                                        |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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Change in other investments
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| - Definition
The net amount paid (received) by the reporting entity through acquisition (sale/maturities) of short-term investments with an original maturity that is less than 12 months which qualify for treatment as an investing activity based on management's intention and intended by management to be liquidated, if necessary, within the current operating cycle.
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The net realized gains or losses on investments during the period, for continuing and discontinued operations.
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| - Definition
The cash outflow used to purchase loans that are secured with net real estate mortgage.
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Payments to Acquire Marketable Securities, Equity
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Proceeds from Sale of Marketable Securities, Equity
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| - Definition
The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.
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| - Definition
Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.
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| - Definition
Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.
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| - Definition
The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.
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| - Definition
Amount of increase (decrease) from effect of exchange rate changes on cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; held in foreign currencies. Excludes amounts for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.
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| - Definition
This element represents the undistributed income (or loss) of equity method investments, net of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations; such investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.
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| - Definition
The increase (decrease) during the reporting period in investment income that has been earned but not yet received in cash.
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| - Definition
The increase (decrease) during the reporting period in the balance sheet value of capitalized sales costs that are associated with acquiring a new insurance customers.
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| - Definition
The increase (decrease) during the reporting period in the aggregate value of financial instruments used in operating activities, including trading securities, risk management instruments, and other short-term trading instruments.
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| - Definition
The increase (decrease) in insurance liability balances during the period.
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| - Definition
Amount of increase (decrease) in receivables classified as other.
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| - Definition
Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.
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| - Definition
Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.
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| - Definition
Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.
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| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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| - Definition
Other cash or noncash adjustments to reconcile net income to cash provided by (used in) operating activities that are not separately disclosed in the statement of cash flows (for example,  cash received or cash paid during the current period for miscellaneous operating activities, net change during the reporting period in other assets or other liabilities).
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| - Definition
Amount of cash (inflow) outflow from investing activities classified as other.
+ References
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| - Definition
The cash outflow to reacquire common stock during the period.
+ References
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| - Definition
Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.
+ References
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| - Definition
Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
+ References
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| - Definition
Cash outflow related to the acquisition or continued holding of limited partnership interests held for investment purposes.
+ References
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| - Definition
The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.
+ References
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| - References
No definition available.
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| - Definition
The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.
+ References
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| - Definition
Cash inflow received as distributions, returns of capital, or sale proceeds from partnership interests held for investment purposes.
+ References
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| - Definition
Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash inflow (outflow) from financing activities classified as other.
+ References
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| - Definition
The cash inflow from proceeds from sale of receivables arising from the mortgage note on real estate; includes collections on mortgage notes receivable that are not classified as operating cash flows.
+ References
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| - Definition
Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.
+ References
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