Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified
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3 Months Ended |
6 Months Ended |
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 30, 2012
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Mar. 31, 2013
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Dec. 31, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
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Accumulated other comprehensive income, net of tax, beginning of period |
$ 1,221 |
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$ 1,221 |
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$ 1,129 |
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Accumulated other comprehensive income, net of tax, end of period |
1,221 |
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1,221 |
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1,129 |
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Accumulated Net Unrealized Investment Gain (Loss)
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Accumulated Other Comprehensive Income Loss Before Tax [Abstract] |
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Accumulated unrealized gains, net, on investments available for sale, before tax, beginning of period |
2,231 |
1,717 |
1,875 |
1,489 |
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Other comprehensive income before reclassification, before tax |
(230) |
(47) |
164 |
194 |
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Reclassification adjustment for realized gains, net, included in net income, before tax |
(14) |
(6) |
(52) |
(19) |
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|
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Effect on other comprehensive income, before tax |
(244) |
(53) |
112 |
175 |
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Accumulated unrealized gains, net, on investments available for sale, before tax, end of period |
1,987 |
1,664 |
1,987 |
1,664 |
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Accumulated Other Comprehensive Income Loss Tax [Abstract] |
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Accumulated unrealized gains, net, on investments available for sale and other invested assets, tax, beginning of period |
686 |
573 |
686 |
573 |
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Other comprehensive income before reclassification, tax |
(81) |
(17) |
56 |
67 |
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Reclassification adjustment for realized gains, net, included in net income, tax |
(4) |
(2) |
(17) |
(6) |
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Effect on other comprehensive income, tax |
(85) |
(19) |
39 |
61 |
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Accumulated unrealized gains, net, on investments available for sale and other invested assets, tax, end of period |
771 |
592 |
647 |
512 |
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Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
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Accumulated unrealized gains, net, on investments available for sale and other invested assets, net of tax, beginning of period |
1,460 |
1,125 |
1,228 |
977 |
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Other comprehensive income before reclassification , net of tax |
(149) |
(30) |
108 |
127 |
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Reclassification adjustment for realized gains, net, included in net income, net of tax |
(10) |
(4) |
(35) |
(13) |
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Effect on other comprehensive income, net of tax |
(159) |
(34) |
73 |
114 |
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Accumulated unrealized gains, net, on investments available for sale and other invested assets, net of tax, end of period |
1,301 |
1,091 |
1,301 |
1,091 |
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Accumulated Defined Benefit Plans Adjustment
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Accumulated Other Comprehensive Income Loss Before Tax [Abstract] |
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Other comprehensive income before reclassification, before tax |
0 |
0 |
0 |
0 |
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Accumulated unrealized losses, net, for pension obligations, before Tax, beginning of period |
(99) |
(86) |
(101) |
(88) |
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Reclassification adjustment for amortization of actuarial loss and prior service cost, net, included in net income, before tax |
3 |
1 |
5 |
3 |
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Effect on other comprehensive income, before tax |
3 |
1 |
5 |
3 |
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Accumulated unrealized losses, net, for pension obligations, before Tax, end of period |
(96) |
(85) |
(96) |
(85) |
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Accumulated Other Comprehensive Income Loss Tax [Abstract] |
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Other comprehensive income before reclassification, tax |
0 |
0 |
0 |
0 |
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Accumulated unrealized losses, net, for pension obligations, tax, beginning of period |
(34) |
(30) |
(35) |
(31) |
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Reclassification adjustment for amortization of actuarial loss and prior service cost, net, included in net income, tax |
1 |
0 |
2 |
1 |
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Effect on other comprehensive income, tax |
1 |
0 |
2 |
1 |
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Accumulated unrealized losses, net, for pension obligations, tax, end of period |
(33) |
(30) |
(33) |
(30) |
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Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
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Other comprehensive income before reclassification , net of tax |
0 |
0 |
0 |
0 |
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Accumulated unrealized losses, net, for pension obligations, net of tax, beginning of period |
(65) |
(56) |
(66) |
(57) |
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Reclassification adjustment for amortization of actuarial loss and prior service cost,net, included in net income, net of tax |
2 |
1 |
3 |
2 |
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Effect on other comprehensive income, net of tax |
2 |
1 |
3 |
2 |
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Accumulated unrealized losses, net, for pension obligations, net of tax, end of period |
(63) |
(55) |
(63) |
(55) |
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Accumulated Net Unrealized Gain (Loss) on Deferred Costs, Reserves And Other
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Accumulated Other Comprehensive Income Loss Before Tax [Abstract] |
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Accumulated unrealized losses, net, on life deferred acquisition costs, life policy reserves and other, before tax, beginning of period |
(50) |
(34) |
(50) |
(29) |
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Effect on other comprehensive income, before tax |
24 |
(5) |
24 |
(10) |
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Accumulated unrealized losses, net, on life deferred acquisition costs, life policy reserves and other, before tax, end of period |
(26) |
(39) |
(26) |
(39) |
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Accumulated Other Comprehensive Income Loss Tax [Abstract] |
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Accumulated unrealized losses, net, on life deferred acquisition costs, life policy reserves and other, tax, beginning of period |
(17) |
(12) |
(17) |
(10) |
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Effect on other comprehensive income, tax |
8 |
(1) |
8 |
(3) |
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Accumulated unrealized losses, net, on life deferred acquisition costs, life policy reserves and other, tax, end of period |
(9) |
(13) |
(9) |
(13) |
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Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
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Accumulated unrealized losses, net, on life deferred acquisition costs, life policy reserves and other, beginning of period, net of tax |
(33) |
(22) |
(33) |
(19) |
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Effect on other comprehensive income, net of tax |
16 |
(4) |
16 |
(7) |
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Accumulated unrealized losses, net, on life deferred acquisition costs, life policy reserves and other, end of period, net of tax |
(17) |
(26) |
(17) |
(26) |
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Accumulated Other Comprehensive Income (Loss)
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Accumulated Other Comprehensive Income Loss Before Tax [Abstract] |
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Accumulated other comprehensive income, before taxes, beginning of period |
2,082 |
1,597 |
1,724 |
1,372 |
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Change in unrealized gains, net, on investments available for sale, before Tax |
(244) |
(53) |
112 |
175 |
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Change in pension obligations, before tax |
3 |
1 |
5 |
3 |
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Change in life deferred acquisition costs, life policy reserves and other, before Tax |
24 |
(5) |
24 |
(10) |
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Effect on other comprehensive income, before Tax |
(217) |
(57) |
141 |
168 |
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Accumulated other comprehensive income, before taxes, end of period |
1,865 |
1,540 |
1,865 |
1,540 |
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Accumulated Other Comprehensive Income Loss Tax [Abstract] |
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Accumulated other comprehensive income, tax, beginning of period |
720 |
550 |
595 |
471 |
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Change in unrealized gains, net, on investments available for sale and other invested assets, tax |
(85) |
(19) |
39 |
61 |
|
|
|
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Change in pension obligations, tax |
1 |
0 |
2 |
1 |
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Change in life deferred acquisition costs, life policy reserves and other, tax |
8 |
(1) |
8 |
(3) |
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Effect on other comprehensive income, tax |
(76) |
(20) |
49 |
59 |
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Accumulated other comprehensive income, tax, end of period |
644 |
530 |
644 |
530 |
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Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
|
|
|
|
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Accumulated other comprehensive income, net of tax, beginning of period |
1,221 |
1,010 |
1,221 |
1,010 |
1,362 |
1,129 |
1,047 |
901 |
Change in unrealized gains, net, on investments available for sale, net of tax |
(159) |
(34) |
73 |
114 |
|
|
|
|
Change in pension obligations, net of tax |
2 |
1 |
3 |
2 |
|
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|
Change in life deferred acquisition costs, life policy reserves and other, net of tax |
16 |
(4) |
16 |
(7) |
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Effect on other comprehensive income, net of tax |
(141) |
(37) |
92 |
109 |
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Accumulated other comprehensive income, net of tax, end of period |
$ 1,221 |
$ 1,010 |
$ 1,221 |
$ 1,010 |
$ 1,362 |
$ 1,129 |
$ 1,047 |
$ 901 |