Fair Value Measurements and Financial Instruments (Details 4) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Other current assets
Schedule of Available-for-sale Securities [Line Items]
Marketable securities	$ 87	$ 61
Assets
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity Securities	61
Held-to-maturity Securities, Fair Value	85
Fair Value, Inputs, Level 1 | Other current assets | Deposits
Schedule of Available-for-sale Securities [Line Items]
Marketable securities	87
Fair Value, Inputs, Level 2 | Other current assets | Bonds Issued By Argentinian Government
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity Securities	50
Fair Value, Inputs, Level 2 | Other assets | Bonds Issued By Argentinian Government | Estimate of Fair Value Measurement
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity Securities	$ 11