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Stock-Based Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2012
Employee Stock Option Plan [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule Of Weighted-Average Assumptions
 
2012
 
2011

2010
Dividend yield (1)
2.7
%
 
2.7
%
 
2.7
%
Expected volatility (2)
45.5
%
 
41.6
%
 
41.0
%
Risk-free interest rate (3)
0.8
%
 
1.4
%
 
2.0
%
Expected term of options (in years) (4)
4.1

 
4.2

 
4.3

Weighted-average grant-date fair value
$
6

 
$
8

 
$
6
Summary Of Stock Option Activity
 
2012
 
Shares
(000)
 
Wtd. Avg.
Ex. Price
 
Wtd. Avg. 
Remaining
Contract Life
 
Aggregate
Intrinsic 
Value
(000)
Outstanding at Beginning of Year
7,555

 
$
21

 
 
 
 
Granted
2,641

 
20

 
 
 
 
Exercised
(689
)
 
15

 
 
 
$
3,810

Forfeited
(646
)
 
21

 
 
 
 
Outstanding at End of Year
8,861

 
21

 
3.4 Yrs
 
$
11,730

Exercisable at End of Year
3,003

 
$
19

 
2.2 Yrs
 
$
7,617


 
 
2011
 
Shares
(000)
 
Wtd. Avg.
Ex. Price
 
Wtd. Avg. 
Remaining
Contract Life
 
Aggregate
Intrinsic 
Value
(000)
Outstanding at Beginning of Year
6,805

 
$
17

 
 
 
 
Granted
2,462

 
29

 
 
 
 
Exercised
(1,497
)
 
16

 
 
 
$
20,659

Forfeited
(215
)
 
19

 
 
 
 
Outstanding at End of Year
7,555

 
21

 
3.5 Yrs
 
$
66,295

Exercisable at End of Year
2,024

 
$
17

 
2.3 Yrs
 
$
26,218


 
2010
 
Shares
(000)
 
Wtd. Avg.
Ex. Price
 
Wtd. Avg. 
Remaining
Contract Life
 
Aggregate
Intrinsic 
Value
(000)
Outstanding at Beginning of Year
8,419

 
$
16

 
 
 
 
Granted
2,197

 
21

 
 
 
 
Exercised
(3,564
)
 
17

 
 
 
$
20,706

Forfeited
(247
)
 
16

 
 
 
 
Outstanding at End of Year
6,805

 
17

 
3.5 Yrs
 
$
85,374

Exercisable at End of Year
1,767

 
$
16

 
2.3 Yrs
 
$
23,810
Schedule Of Non-Vested Stock Option Activity
 
2012
 
2011
 
2010
 
Shares
(000)
 
Wtd. Avg
Grant
Date
Fair Value
 
Shares
(000)
 
Wtd. Avg
Grant
Date
Fair Value
 
Shares
(000)
 
Wtd. Avg
Grant
Date
Fair Value
Nonvested stock options at Beginning of Year
5,530

 
$
6

 
5,038

 
$
5

 
4,662

 
$
4

Granted
2,641

 
6

 
2,462

 
8

 
2,197

 
6

Vested
(1,936
)
 
5

 
(1,766
)
 
5

 
(1,642
)
 
4

Forfeited
(377
)
 
6

 
(204
)
 
5

 
(179
)
 
4

Nonvested stock options at End of Year
5,858

 
$
6

 
5,530

 
$
6

 
5,038

 
$
5
Non-Employee Director Stock Option Plan [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule Of Weighted-Average Assumptions
 
2012
 
2011
 
2010
Dividend yield (1)
2.6
%
 
2.7
%
 
2.7
%
Expected volatility (2)
44.5
%
 
40.5
%
 
40.8
%
Risk-free interest rate (3)
1.7
%
 
3.2
%
 
3.5
%
Expected term of options (in years) (4)
6.8

 
6.5

 
8.1

Weighted-average grant-date fair value
$
8

 
$
11

 
$
8
Summary Of Stock Option Activity
 
2012
 
Shares
(000)
 
Wtd. Avg.
Ex. Price
 
Wtd. Avg. 
Remaining
Contract Life
 
Aggregate
Intrinsic 
Value
(000)
Outstanding at Beginning of Year
192

 
$
21

 
 
 
 
Granted
42

 
22

 
 
 
 
Exercised
—

 
—

 
 
 


Forfeited
—

 
—

 
 
 
 
Outstanding at End of Year
234

 
21

 
6.4 Yrs
 
$
225

Exercisable at End of Year
234

 
$
21

 
6.4 Yrs
 
$
225


 
 
2011
 
Shares
(000)
 
Wtd. Avg.
Ex. Price
 
Wtd. Avg. 
Remaining
Contract Life
 
Aggregate
Intrinsic 
Value
(000)
Outstanding at Beginning of Year
244

 
$
18

 
 
 
 
Granted
42

 
32

 
 
 
 
Exercised
(94
)
 
17

 
 
 
$
1,362

Forfeited
—

 
—

 
 
 
 
Outstanding at End of Year
192

 
21

 
6.8 Yrs
 
$
1,740

Exercisable at End of Year
192

 
$
21

 
6.8 Yrs
 
$
1,740

 
 
2010
 
Shares
(000)
 
Wtd. Avg.
Ex. Price
 
Wtd. Avg. 
Remaining
Contract Life
 
Aggregate
Intrinsic 
Value
(000)
Outstanding at Beginning of Year
429

 
$
16

 
 
 
 
Granted
48

 
21

 
 
 
 
Exercised
(233
)
 
16

 
 
 
$
1,932

Forfeited
—

 
—

 
 
 
 
Outstanding at End of Year
244

 
18

 
6.1
 Yrs
 
$
2,937

Exercisable at End of Year
244

 
$
18

 
6.1
 Yrs
 
$
2,937
Schedule Of Non-Vested Stock Option Activity
 
2012
 
2011
 
2010
 
Shares
(000)
 
Wtd. Avg
Grant Date
Fair Value
 
Shares
(000)
 
Wtd. Avg
Grant Date
Fair Value
 
Shares
(000)
 
Wtd. Avg
Grant Date
Fair Value
Nonvested stock options at Beginning of Year
—

 
$
—

 
—

 
$
—

 
—

 
$
—

Granted
42

 
8

 
42

 
11

 
48

 
8

Vested
(42
)
 
8

 
(42
)
 
11

 
(48
)
 
8

Forfeited
—

 
—

 
—

 
—

 
—

 
—

Nonvested stock options at End of Year
—

 
$
—

 
—

 
$
—

 
—

 
$
—