Chesapeake Energy 2010 Annual Report Download - page 168

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CHESAPEAKE ENERGY CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)
15. Asset Retirement Obligations
The components of the change in our asset retirement obligations are shown below.
Years Ended December 31,
2010 2009
($ in millions)
Asset retirement obligations, beginning of period ........................ $ 282 $ 269
Additions ....................................................... 16 14
Revisions ...................................................... — (3)
Settlements and disposals ........................................ (12) (15)
Accretion expense ............................................... 15 17
Asset retirement obligations, end of period ............................. $ 301 $ 282
16. Major Customers and Segment Information
There were no sales to individual customers constituting 10% or more of total revenues (before the effects
of hedging) for the year ended December 31, 2010. Major customers for the years ended December 31, 2009
and 2008 were as follows:
Year Ended
December 31, Customer Amount
Percent of
Total Revenues
($ in millions)
2009 EDF Trading North America LLC $ 571 10%
2008 Eagle Energy Partners I, L.P. $ 1,283 12%
In accordance with accounting guidance for disclosures about segments of an enterprise and related
information, we have two reportable operating segments. Our exploration and production operating segment
and natural gas and oil marketing, gathering and compression operating segment are managed separately
because of the nature of their products and services. The exploration and production segment is responsible
for finding and producing natural gas and oil. The marketing, gathering and compression segment is
responsible for marketing, gathering and compression of natural gas and oil primarily from Chesapeake-
operated wells. We also have drilling rig and trucking operations which are responsible for providing drilling rigs
primarily used on Chesapeake-operated wells and trucking services utilized in the transportation of drilling rigs
on both Chesapeake-operated wells and wells operated by third parties. Our drilling rig and trucking service
operations are presented in “Other Operations” in the table below.
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