2020 &

In millions

Total

2015

2016

2017

2018

2019

thereafter

Recorded contractual obligations:

Long-term debt (1)

$

3,706

$

200

$

545

$

22

$

155

$

350

$

2,434

Short-term debt

1,175

-

Environmental remediation liabilities (2)

414

87

93

55

47

37

95

Total

$

5,295

$

1,462

$

638

$

77

$

202

$

387

$

2,529

Unrecorded contractual obligations and commitments(3) (8):

Pipeline charges, storage capacity and gas supply (4)

$

4,303

$

805

$

457

$

280

$

234

$

222

$

2,305

Interest charges (5)

2,762

179

171

147

146

141

1,978

Operating leases (6)

188

33

31

24

17

18

65

Asset management agreements (7)

32

9

10

7

4

2

-

Standby letters of credit, performance/surety bonds (8)

50

49

1

-

Other

8

3

1

-

Total

$

7,343

$

1,078

$

673

$

459

$

402

$

383

$

4,348