December 31
Millions of dollars	2009	2008	2007
Total assets:
Completion and Production	$ 5,920	$ 5,936	$ 4,763
Drilling and Evaluation	6,204	6,205	4,685
Shared assets	914	648	672
Corporate and other	3,500	1,596	3,015
Total	$ 16,538	$ 14,385	$ 13,135