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Financial Instruments - Narrative (Details) $ in Millions | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2017 USD ($) interest_rate_swap | Sep. 30, 2016 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Derivative [Line Items] |  |  |  |
Pretax losses from euro-denominated notes included in cumulative translation adjustments | $ 467 | $ 60 |  |
Number of interest rate swaps held (in interest rate swaps) | interest_rate_swap | 26 |  |  |
Pretax net unrealized loss on derivatives maturing within next 12 months estimated to be reclassified from AOCI to sales | $ 164 |  |  |
Available-for-sale debt securities included in Short-term investments | 3,000 |  |  |
Available-for-sale debt securities maturing after one year through five years | 11,200 |  |  |
Cash and cash equivalents | 7,901 | $ 7,907 | $ 6,515 | $ 8,524
Fair value of loans payable and long-term debt, including current portion | 28,300 |  | 25,700 |
Carrying value of loans payable and long-term debt, including current portion | 27,000 |  | 24,800 |
Accounts receivable outstanding for more than one year | 190 |  |  |
Cash collateral received from counterparties | 8 |  | $ 529 |
Significant Other Observable Inputs (Level 2) |  |  |  |
Derivative [Line Items] |  |  |  |
Cash and cash equivalents | 7,900 |  |  |
Cash equivalents | $ 7,100 |  |  |
Derivatives Designated as Hedging Instruments | Maximum |  |  |  |
Derivative [Line Items] |  |  |  |
Maximum average period of maturities of contracts in years (less than) | 2 years |  |  |
Derivatives Not Designated as Hedging Instruments | Maximum |  |  |  |
Derivative [Line Items] |  |  |  |
Maximum average period of maturities of contracts in years (less than) | 1 year |  |  |

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- Definition Fair value of available-for-sale debt securities maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563 + Details
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