| Schedule of Available-for-sale Securities Reconciliation [Table Text Block] |
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July 1, 2017 |
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December 31, 2016 |
(In Millions) |
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Adjusted Cost |
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Gross Unrealized Gains |
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Gross Unrealized Losses |
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Fair Value |
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Adjusted Cost |
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Gross Unrealized Gains |
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Gross Unrealized Losses |
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Fair Value |
Corporate debt |
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$ |
6,115 |
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$ |
13 |
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$ |
(7 |
) |
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$ |
6,121 |
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$ |
3,847 |
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$ |
4 |
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$ |
(14 |
) |
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$ |
3,837 |
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Financial institution instruments |
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8,011 |
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7 |
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(6 |
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8,012 |
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6,098 |
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5 |
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(11 |
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6,092 |
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Government debt |
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1,778 |
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3 |
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(5 |
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1,776 |
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1,581 |
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— |
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(8 |
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1,573 |
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Marketable equity securities |
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2,560 |
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3,344 |
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— |
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5,904 |
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2,818 |
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3,363 |
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(1 |
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6,180 |
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Total available-for-sale investments |
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$ |
18,464 |
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$ |
3,367 |
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$ |
(18 |
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$ |
21,813 |
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$ |
14,344 |
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$ |
3,372 |
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$ |
(34 |
) |
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$ |
17,682 |
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| Investments Classified by Contractual Maturity Date [Table Text Block] |
The fair value of available-for-sale debt investments, by contractual maturity, as of July 1, 2017, were as follows:
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(In Millions) |
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Fair Value |
Due in 1 year or less |
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$ |
8,408 |
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Due in 1–2 years |
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1,434 |
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Due in 2–5 years |
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2,976 |
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Due after 5 years |
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71 |
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Instruments not due at a single maturity date |
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3,020 |
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Total |
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$ |
15,909 |
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