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Quarterly Results of Operations (unaudited) (Tables)
 12 Months Ended
Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]  
Schedule of quarterly results of operations (unaudited)
 
 
Erie Insurance Group
 
 
Year ended December 31, 2012
(in millions, except per share data)
 
First
quarter
 
Second
quarter
 
Third
quarter
 
Fourth
quarter
 
Year
Revenues
 
$
1,520

 
$
1,160

 
$
1,460

 
$
1,372

 
$
5,512

Benefits and expenses
 
986

 
1,230

 
1,190

 
1,207

 
4,613

Income (loss) from operations before income taxes and noncontrolling interest
 
534

 
(70
)
 
270

 
165

 
899

Net income (loss)
 
354

 
(38
)
 
184

 
119

 
619

Less: Net income (loss) attributable to noncontrolling interest in consolidated entity – Exchange
 
318

 
(81
)
 
133

 
89

 
459

Net income attributable to Indemnity
 
$
36

 
$
43

 
$
51

 
$
30

 
$
160

 
 
 
 
 
 
 
 
 
 
 
Earnings per share (1)
 
 
 
 
 
 
 
 
 
 
Net income attributable to Indemnity per share
 
 
 
 
 
 
 
 
 
 
Class A common stock – basic
 
$
0.76

 
$
0.90

 
$
1.08

 
$
0.63

 
$
3.38

Class A common stock – diluted
 
$
0.67

 
$
0.80

 
$
0.96

 
$
0.56

 
$
2.99

Class B common stock – basic and diluted
 
$
114

 
$
135

 
$
162

 
$
94

 
$
505

 
(1)       
The cumulative sum of quarterly basic and diluted net income per share amounts may not equal total basic and diluted net income per share for the year due to differences in weighted average shares and equivalent shares outstanding for each of the periods presented.
 
 
 
 
Erie Insurance Group
 
 
Year ended December 31, 2011
(in millions, except per share data)
 
First
quarter
 
 Second
  quarter
 
 Third
 quarter
 
 Fourth
 quarter
 
Year
Revenues
 
$
1,365

 
$
1,245

 
$
796

 
$
1,418

 
$
4,824

Benefits and expenses
 
953

 
1,419

 
1,101

 
993

 
4,466

Income (loss) from operations before income taxes and noncontrolling interest
 
412

 
(174
)
 
(305
)
 
425

 
358

Net income (loss)
 
274

 
(107
)
 
(180
)
 
281

 
268

Less: Net income (loss) attributable to noncontrolling interest in consolidated entity – Exchange
 
230

 
(159
)
 
(227
)
 
255

 
99

Net income attributable to Indemnity
 
$
44

 
$
52

 
$
47

 
$
26

 
$
169

 
 
 
 
 
 
 
 
 
 
 
Earnings per share (1)
 
 
 
 
 
 
 
 
 
 
Net income attributable to Indemnity per share
 
 
 
 
 
 
 
 
 
 
Class A common stock – basic
 
$
0.88

 
$
1.05

 
$
0.97

 
$
0.55

 
$
3.45

Class A common stock – diluted
 
$
0.78

 
$
0.94

 
$
0.87

 
$
0.49

 
$
3.08

Class B common stock – basic and diluted
 
$
126

 
$
158

 
$
147

 
$
82

 
$
522

 
(1)       
The cumulative sum of quarterly basic and diluted net income per share amounts may not equal total basic and diluted net income per share for the year due to differences in weighted average shares and equivalent shares outstanding for each of the periods presented.