2. Accounts Receivable

The components of accounts receivable include the following:

	December 31,
	2007			2006
	(In millions)
Oil, gas and NGL revenue	$	1,184			951
Joint interest billings		240			209
Marketing and midstream revenue		183			138
Other		177			31
Gross accounts receivable		1,784			1,329
Allowance for doubtful accounts		(5	)		(5	)
Net accounts receivable	$	1,779			1,324