Financial Instruments and Risk Concentration - Schedule of Accounts Receivable Allowances (Details) - Allowance for doubtful accounts, current - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	$ 12	$ 22	$ 31
Additions charged (credited) to operating results	(5)	(9)	(9)
Recoveries and write-offs, net	0	(1)	0
Balance at end of year	$ 7	$ 12	$ 22