| Marketable Securities [Text Block] |
Marketable Securities
The following table summarizes the fair value of cash equivalents and marketable securities which approximates cost:
| | | | | | | | | | | | Fair Value Level | | March 31, 2016 | | December 31, 2015 | Cash, cash equivalents and time deposits | | | $ | 8,724 |
| | $ | 7,730 |
| Available-for-sale securities | | | | | | U.S. government and agencies | 2 | | $ | 3,841 |
| | $ | 5,329 |
| Corporate debt | 2 | | 4,784 |
| | 6,267 |
| Money market funds | 1 | | 2,746 |
| | 2,275 |
| Sovereign debt | 2 | | 912 |
| | 1,219 |
| Total available-for-sale securities | | | 12,283 |
| | 15,090 |
| Trading securities – sovereign debt | 2 | | 424 |
| | 581 |
| Total marketable securities (including securities classified as cash equivalents) | | | $ | 12,707 |
| | $ | 15,671 |
| Restricted cash and marketable securities | | | | | | Available-for-sale securities, primarily money market funds | 1 | | $ | 1,529 |
| | $ | 1,340 |
| Restricted cash, cash equivalents and time deposits | | | 826 |
| | 833 |
| Total restricted cash and marketable securities | | | $ | 2,355 |
| | $ | 2,173 |
| Available-for-sale securities included above with contractual maturities | | | | | | Due in one year or less | | | $ | 7,684 |
| | | Due between one and five years | | | 1,901 |
| | | Total available-for-sale securities with contractual maturities | | | $ | 9,585 |
| | |
Marketable securities classified as cash equivalents totaled $6.2 billion and $7.5 billion at March 31, 2016 and December 31, 2015 and consisted of corporate debt, money market funds and sovereign debt. Sales proceeds from investments classified as available-for-sale and sold prior to maturity were $2.6 billion and $1.4 billion in the three months ended March 31, 2016 and 2015. Net unrealized gains and losses on trading securities were insignificant in the three months ended March 31, 2016 and 2015. |