Anadarko Petroleum Corp., Houston, (NYSE: APC) plans to acquire Kerr-McGee Corp., Oklahoma City, (NYSE: KMG) and Western Gas Resources Inc., Denver, (NYSE: WGR) in separate deals for a total of approximately $21.1 billion, plus $2.2 billion in assumed debt. Anadarko will pay $16.4 billion ($70.50 per share) for Kerr-McGee, plus $1.6 billion in assumed debt and other liabilities. The company will also pay $4.7 billion ($61 per share) for Western Gas Resources, plus $600 million in assumed debt and other liabilities. Both deals are all-cash transactions that Anadarko will finance with a $24 billion committed acquisition facility provided by UBS, Credit Suisse and Citigroup.