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Investments (Tables)
 6 Months Ended
Jun. 30, 2013
Investments, Debt and Equity Securities [Abstract]  
Schedule Of Amortized Cost And Fair Value Of Fixed Maturities And Related OTTI Recognized In AOCI
June 30, 2013
Amortized
Cost

 
Gross
Unrealized
Appreciation

 
Gross
Unrealized
Depreciation

 
Fair
Value

 
OTTI Recognized
in AOCI

(in millions of U.S. dollars)
 
 
 
 
Available for sale
 
 
 
 
 
 
 
 
 
U.S. Treasury and agency
$
3,238

 
$
89

 
$
(39
)
 
$
3,288

 
$
—

Foreign
13,552

 
401

 
(112
)
 
13,841

 
—

Corporate securities
16,263

 
751

 
(150
)
 
16,864

 
(6
)
Mortgage-backed securities
9,719

 
225

 
(166
)
 
9,778

 
(37
)
States, municipalities, and political subdivisions
3,216

 
85

 
(56
)
 
3,245

 
—

 
$
45,988

 
$
1,551

 
$
(523
)
 
$
47,016

 
$
(43
)
Held to maturity
 
 
 
 
 
 
 
 
 
U.S. Treasury and agency
$
858

 
$
22

 
$
(4
)
 
$
876

 
$
—

Foreign
873

 
32

 
—

 
905

 
—

Corporate securities
2,030

 
78

 
—

 
2,108

 
—

Mortgage-backed securities
1,615

 
52

 
—

 
1,667

 
—

States, municipalities, and political subdivisions
1,200

 
22

 
(16
)
 
1,206

 
—

 
$
6,576

 
$
206

 
$
(20
)
 
$
6,762

 
$
—

 
 
 
 
 
 
 
 
 
 
December 31, 2012
Amortized
Cost

 
Gross
Unrealized
Appreciation

 
Gross
Unrealized
Depreciation

 
Fair
Value

 
OTTI Recognized
in AOCI

(in millions of U.S. dollars)
 
 
 
 
Available for sale
 
 
 
 
 
 
 
 
 
U.S. Treasury and agency
$
3,553

 
$
183

 
$
(1
)
 
$
3,735

 
$
—

Foreign
13,016

 
711

 
(14
)
 
13,713

 
—

Corporate securities
15,529

 
1,210

 
(31
)
 
16,708

 
(7
)
Mortgage-backed securities
10,051

 
458

 
(36
)
 
10,473

 
(84
)
States, municipalities, and political subdivisions
2,517

 
163

 
(3
)
 
2,677

 
—

 
$
44,666

 
$
2,725

 
$
(85
)
 
$
47,306

 
$
(91
)
Held to maturity
 
 
 
 
 
 
 
 
 
U.S. Treasury and agency
$
1,044

 
$
39

 
$
—

 
$
1,083

 
$
—

Foreign
910

 
54

 
—

 
964

 
—

Corporate securities
2,133

 
142

 
—

 
2,275

 
—

Mortgage-backed securities
2,028

 
88

 
—

 
2,116

 
—

States, municipalities, and political subdivisions
1,155

 
44

 
(4
)
 
1,195

 
—

 
$
7,270

 
$
367

 
$
(4
)
 
$
7,633

 
$
—
Schedule Of Fixed Maturities By Contractual Maturity
 
 
 
June 30

 
 
 
December 31

 
 
 
2013

 
 
 
2012

(in millions of U.S. dollars)
Amortized Cost

 
Fair Value

 
Amortized Cost

 
Fair Value

Available for sale
 
 
 
 
 
 
 
Due in 1 year or less
$
2,102

 
$
2,121

 
$
1,887

 
$
1,906

Due after 1 year through 5 years
14,042

 
14,493

 
13,411

 
14,010

Due after 5 years through 10 years
15,833

 
16,179

 
15,032

 
16,153

Due after 10 years
4,292

 
4,445

 
4,285

 
4,764

 
36,269

 
37,238

 
34,615

 
36,833

Mortgage-backed securities
9,719

 
9,778

 
10,051

 
10,473

 
$
45,988

 
$
47,016

 
$
44,666

 
$
47,306

Held to maturity
 
 
 
 
 
 
 
Due in 1 year or less
$
447

 
$
451

 
$
656

 
$
659

Due after 1 year through 5 years
2,218

 
2,288

 
1,870

 
1,950

Due after 5 years through 10 years
1,833

 
1,878

 
2,119

 
2,267

Due after 10 years
463

 
478

 
597

 
641

 
4,961

 
5,095

 
5,242

 
5,517

Mortgage-backed securities
1,615

 
1,667

 
2,028

 
2,116

 
$
6,576

 
$
6,762

 
$
7,270

 
$
7,633
Schedule Of Cost And Fair Value Of Equity Securities
 
June 30


December 31

(in millions of U.S. dollars)
2013


2012

Cost
$
843

 
$
707

Gross unrealized appreciation
45

 
41

Gross unrealized depreciation
(51
)
 
(4
)
Fair value
$
837

 
$
744
Schedule Of Net Realized Gains (Losses) And The Losses Included In Net Realized Gains (Losses) And OCI
 
Three Months Ended
 
 
Six Months Ended
 
 
June 30
 
 
June 30
 
(in millions of U.S. dollars)
2013

 
2012

 
2013

 
2012

Fixed maturities:
 
 
 
 
 
 
 
OTTI on fixed maturities, gross
$
(6
)
 
$
(1
)
 
$
(7
)
 
$
(8
)
OTTI on fixed maturities recognized in OCI (pre-tax)
—

 
—

 
—

 
—

OTTI on fixed maturities, net
(6
)
 
(1
)
 
(7
)
 
(8
)
Gross realized gains excluding OTTI
64

 
104

 
126

 
216

Gross realized losses excluding OTTI
(27
)
 
(35
)
 
(52
)
 
(106
)
Total fixed maturities
31

 
68

 
67

 
102

Equity securities:
 
 
 
 
 
 
 
OTTI on equity securities
—

 
(4
)
 
(1
)
 
(5
)
Gross realized gains excluding OTTI
8

 
—

 
10

 
2

Gross realized losses excluding OTTI
(1
)
 
(1
)
 
(3
)
 
(1
)
Total equity securities
7

 
(5
)
 
6

 
(4
)
OTTI on other investments
(1
)
 
(5
)
 
(2
)
 
(7
)
Foreign exchange gains (losses)
(5
)
 
(9
)
 
71

 
(14
)
Investment and embedded derivative instruments
40

 
(49
)
 
58

 
(7
)
Fair value adjustments on insurance derivative
101

 
(467
)
 
429

 
(39
)
S&P put options and futures
(68
)
 
70

 
(318
)
 
(161
)
Other derivative instruments
(1
)
 
1

 
(1
)
 
(4
)
Other
—

 
2

 
—

 
—

Net realized gains (losses)
$
104

 
$
(394
)
 
$
310

 
$
(134
)
Schedule Of Roll-Forward Of Pre-Tax Credit Losses Related To Fixed Maturities For Which A Portion Of OTTI Was Recognized In OCI
 
Three Months Ended
 
 
Six Months Ended
 
 
June 30
 
 
June 30
 
(in millions of U.S. dollars)
2013

 
2012

 
2013

 
2012

Balance of credit losses related to securities still held – beginning of period
$
35

 
$
55

 
$
43

 
$
74

Additions where no OTTI was previously recorded
4

 
1

 
4

 
2

Additions where an OTTI was previously recorded
2

 
—

 
3

 
5

Reductions for securities sold during the period
(1
)
 
(9
)
 
(10
)
 
(34
)
Balance of credit losses related to securities still held – end of period
$
40

 
$
47

 
$
40

 
$
47
Schedule Of Aggregate Fair Value And Gross Unrealized Loss By Length Of Time The Security Has Continuously Been In An Unrealized Loss Position
 
0 – 12 Months
 
 
Over 12 Months
 
 
Total
 
June 30, 2013
Fair Value

 
Gross
Unrealized
Loss

 
Fair Value

 
Gross
Unrealized
Loss

 
Fair Value

 
Gross
Unrealized
Loss

(in millions of U.S. dollars)
 
 
 
 
 
U.S. Treasury and agency
$
1,670

 
$
(43
)
 
$
—

 
$
—

 
$
1,670

 
$
(43
)
Foreign
4,278

 
(108
)
 
76

 
(4
)
 
4,354

 
(112
)
Corporate securities
4,535

 
(140
)
 
77

 
(10
)
 
4,612

 
(150
)
Mortgage-backed securities
4,190

 
(153
)
 
125

 
(13
)
 
4,315

 
(166
)
States, municipalities, and political subdivisions
2,057

 
(72
)
 
2

 
—

 
2,059

 
(72
)
Total fixed maturities
16,730

 
(516
)
 
280

 
(27
)
 
17,010

 
(543
)
Equity securities
522

 
(51
)
 
—

 
—

 
522

 
(51
)
Other investments
37

 
(5
)
 
—

 
—

 
37

 
(5
)
Total
$
17,289

 
$
(572
)
 
$
280

 
$
(27
)
 
$
17,569

 
$
(599
)
 
 
0 – 12 Months
 
 
Over 12 Months
 
 
Total
 
December 31, 2012
Fair Value

 
Gross
Unrealized
Loss

 
Fair Value

 
Gross
Unrealized
Loss

 
Fair Value

 
Gross
Unrealized
Loss

(in millions of U.S. dollars)
 
 
 
 
 
U.S. Treasury and agency
$
440

 
$
(1
)
 
$
—

 
$
—

 
$
440

 
$
(1
)
Foreign
1,234

 
(8
)
 
88

 
(6
)
 
1,322

 
(14
)
Corporate securities
1,026

 
(23
)
 
85

 
(8
)
 
1,111

 
(31
)
Mortgage-backed securities
855

 
(4
)
 
356

 
(32
)
 
1,211

 
(36
)
States, municipalities, and political subdivisions
316

 
(3
)
 
48

 
(4
)
 
364

 
(7
)
Total fixed maturities
3,871

 
(39
)
 
577

 
(50
)
 
4,448

 
(89
)
Equity securities
29

 
(4
)
 
—

 
—

 
29

 
(4
)
Other investments
68

 
(5
)
 
—

 
—

 
68

 
(5
)
Total
$
3,968

 
$
(48
)
 
$
577

 
$
(50
)
 
$
4,545

 
$
(98
)
Schedule Of Components Of Restricted Assets
 
June 30

 
December 31

(in millions of U.S. dollars)
2013

 
2012

Trust funds
$
10,909

 
$
11,389

Deposits with non-U.S. regulatory authorities
1,989

 
2,133

Assets pledged under repurchase agreements
1,458

 
1,401

Deposits with U.S. regulatory authorities
1,335

 
1,338

Other pledged assets
395

 
456

 
$
16,086

 
$
16,717