June 30, 2013

June 30, 2012

Dollars in millions

Year(s) due

Weighted average interest rate (1)

Outstanding

Outstanding at December 31, 2012

Weighted average interest rate (1)

Outstanding

Short-term debt

Commercial paper - AGL Capital (2)

2013

0.5

%

$

521

$

1,063

0.5

%

$

731

Commercial paper - Nicor Gas

2013

0.4

-

314

0.5

-

Total short-term debt

0.5

521

1,377

0.5

731

Current portion of long-term debt and capital leases

Current portion of long-term debt

2013

4.5

-

225

4.7

230

Current portion of capital leases

2013

5.0

-

1

4.9

1

Total current portion of long-term debt and capital leases

4.5

%

$

-

$

226

4.7

%

$

231

Long-term debt - excluding current portion

Senior notes

2015

-

2043

5.1

%

$

2,825

$

2,325

5.1

%

$

2,325

First mortgage bonds

2016

-

2038

5.6

500

5.6

500

Gas facility revenue bonds

2022

-

2033

0.5

200

1.2

200

Medium-term notes

2017

-

2027

7.8

181

7.8

181

Total principal long-term debt

4.9

3,706

3,206

5.0

3,206

Fair value adjustment of long-term debt (3)

2016

-

2038

n/a

97

103

n/a

110

Unamortized debt premium, net

n/a

16

18

n/a

18

Total non-principal long-term debt

n/a

113

121

n/a

128

Total long-term debt

$

3,819

$

3,327

$

3,334

Total debt

$

4,340

$

4,930

$

4,296