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SHAREHOLDERS' EQUITY - Reclassifications Out of Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2013 | Mar. 31, 2012
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Sales and redemptions | $ 119 |  | $ 78
Other-than-temporary impairment losses realized | (55) |  | (203)
Derivative and other gains (losses) | 92 |  | 80
Acquisition and operating expenses | (1,326) |  | (1,392)
Total before tax | 1,361 |  | 1,202
Tax (expense) or benefit | (469) |  | (417)
Net of tax | 892 |  | 785
The expected U.S. tax rate | 35.00% |  |
Reclassification Out Of Accumulated Other Comprehensive Income |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Net of tax | 38 | [1] |
Reclassification Out Of Accumulated Other Comprehensive Income | Unrealized foreign currency translation gains (losses) |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Sales and redemptions | 10 | [1] |
Tax (expense) or benefit | (3) | [1],[2] |
Net of tax | 7 | [1] |
Reclassification Out Of Accumulated Other Comprehensive Income | Unrealized gains (losses) on investment securities |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Sales and redemptions | 109 | [1] |
Other-than-temporary impairment losses realized | (55) | [1] |
Total before tax | 54 | [1] |
Tax (expense) or benefit | (19) | [1],[2] |
Net of tax | 35 | [1] |
Reclassification Out Of Accumulated Other Comprehensive Income | Pension liability adjustment |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Acquisition and operating expenses | (5) | [1],[3] |
Tax (expense) or benefit | 2 | [1],[2] |
Net of tax | (3) | [1] |
Foreign currency swaps | Reclassification Out Of Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives |  |  |
Reclassification Out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Derivative and other gains (losses) | (1) | [1] |
Tax (expense) or benefit | 0 | [1],[2] |
Net of tax | $ (1) | [1] |
[1] | Amounts in parentheses indicate debits.
[2] | Based on 35% tax rate
[3] | These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 9 for additional details).

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