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Fair Value Measurements and Financial Instruments (Details 4) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Other Current Assets |  |  |  |
Schedule of Available for Sale Securities [Line Items] |  |  |  |
Marketable securities | $ 23 | $ 61 |  |
Assets |  |  |  |
Schedule of Available for Sale Securities [Line Items] |  |  |  |
Held-to-maturity securities | 52 | 61 |  |
Bonds Issued By Argentinian Government |  |  |  |
Schedule of Available for Sale Securities [Line Items] |  |  |  |
Available-for-sale securities |  | 0 | $ 399 | $ 685
Bonds Issued By Argentinian Government | Other Current Assets |  |  |  |
Schedule of Available for Sale Securities [Line Items] |  |  |  |
Marketable securities | 48 |  |  |
Bonds Issued By Argentinian Government | Other Assets |  |  |  |
Schedule of Available for Sale Securities [Line Items] |  |  |  |
Available-for-sale securities | 4 |  |  |
Fair Value, Inputs, Level 1 | Deposits | Other Current Assets |  |  |  |
Schedule of Available for Sale Securities [Line Items] |  |  |  |
Marketable securities | 23 |  |  |
Fair Value, Inputs, Level 2 | Assets |  |  |  |
Schedule of Available for Sale Securities [Line Items] |  |  |  |
Held-to-maturity securities, fair value | $ 64 | $ 77 |  |

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