Accounts Receivable (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accounts Notes And Loans Receivable [Line Items]
Malaysia Reserve for Doubtful Accounts Allowance	$ 15
Accounts receivable	405	474
Revenue [Member]
Accounts Notes And Loans Receivable [Line Items]
Accounts receivable	155	294
Other accounts receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Accounts receivable	36	25
Allowance For Doubtful Accounts [Member]
Accounts Notes And Loans Receivable [Line Items]
Accounts receivable	(16)	(1)
Oil and Gas Joint Interest Billing [Member]
Accounts Notes And Loans Receivable [Line Items]
Accounts receivable	$ 230	$ 156