Available-for-Sale Securities (Tables)
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9 Months Ended |
Sep. 30, 2016 |
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| Investments, Debt and Equity Securities [Abstract] |
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| Summary of Available-for-Sale Securities at Estimated Fair Value |
The following table is a summary of our available-for-sale securities (in millions): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2016 | | December 31, 2015 | | | Amortized
Cost | | Gross
Unrealized
Gains | | Gross
Unrealized
Losses | | Estimated
Fair Value | | Amortized
Cost | | Gross
Unrealized
Gains | | Gross
Unrealized
Losses | | Estimated
Fair Value | | | | | | | | | | | | | | | | | | Money market funds | | $ | 7,362 |
| | $ | — |
| | $ | — |
| | $ | 7,362 |
| | $ | 10,161 |
| | $ | — |
| | $ | — |
| | $ | 10,161 |
| Corporate debt securities | | 11,152 |
| | 35 |
| | (7 | ) | | 11,180 |
| | 5,795 |
| | 1 |
| | (23 | ) | | 5,773 |
| U.S. treasury securities | | 5,172 |
| | 6 |
| | (2 | ) | | 5,176 |
| | 4,407 |
| | — |
| | (18 | ) | | 4,389 |
| Residential mortgage and asset-backed securities | | 3,349 |
| | 11 |
| | (1 | ) | | 3,359 |
| | 1,701 |
| | — |
| | (6 | ) | | 1,695 |
| U.S. government agencies securities | | 1,234 |
| | 1 |
| | (1 | ) | | 1,234 |
| | 709 |
| | — |
| | (2 | ) | | 707 |
| Non-U.S. government securities | | 609 |
| | 1 |
| | (1 | ) | | 609 |
| | 315 |
| | — |
| | (2 | ) | | 313 |
| Certificates of deposit | | 244 |
| | — |
| | — |
| | 244 |
| | 448 |
| | — |
| | — |
| | 448 |
| Municipal debt securities | | 30 |
| | — |
| | — |
| | 30 |
| | 34 |
| | — |
| | — |
| | 34 |
| Equity securities | | 357 |
| | 75 |
| | — |
| | 432 |
| | — |
| | — |
| | — |
| | — |
| Total | | $ | 29,509 |
| | $ | 129 |
| | $ | (12 | ) | | $ | 29,626 |
| | $ | 23,570 |
| | $ | 1 |
| | $ | (51 | ) | | $ | 23,520 |
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| Summary of the Classification of Available-for-Sale Securities |
The following table summarizes the classification of the available-for-sale securities in our Condensed Consolidated Balance Sheets (in millions): | | | | | | | | | | | | September 30, 2016 | | December 31, 2015 | Cash and cash equivalents | | $ | 7,392 |
| | $ | 10,163 |
| Short-term marketable securities | | 2,457 |
| | 1,756 |
| Long-term marketable securities | | 19,345 |
| | 11,601 |
| Other long-term assets | | 432 |
| | — |
| Total | | $ | 29,626 |
| | $ | 23,520 |
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| Summary of Available-for-Sale Securities by Contractual Maturity |
The following table summarizes our portfolio of available-for-sale debt securities by contractual maturity (in millions): | | | | | | | | | | | | September 30, 2016 | | | Amortized Cost | | Fair Value | Less than one year | | $ | 9,848 |
| | $ | 9,849 |
| Greater than one year but less than five years | | 18,620 |
| | 18,661 |
| Greater than five years but less than ten years | | 531 |
| | 531 |
| Greater than ten years | | 153 |
| | 153 |
| Total | | $ | 29,152 |
| | $ | 29,194 |
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| Summary of Available-for-Sale Securities in a Continuous Loss Position Deemed not to be Other-than-Temporarily Impaired |
The following table summarizes our available-for-sale securities that were in a continuous unrealized loss position, but were not deemed to be other-than-temporarily impaired (in millions): | | | | | | | | | | | | | | | | | | | | | | | | | | | | Less Than 12 Months | | 12 Months or Greater | | Total | | | Gross
Unrealized
Losses | | Estimated
Fair Value | | Gross
Unrealized
Losses | | Estimated
Fair Value | | Gross
Unrealized
Losses | | Estimated
Fair Value | September 30, 2016 | | | | | | | | | | | | | Corporate debt securities | | $ | (6 | ) | | $ | 3,565 |
| | $ | — |
| | $ | 166 |
| | $ | (6 | ) | | $ | 3,731 |
| U.S. treasury securities | | (2 | ) | | 1,810 |
| | — |
| | — |
| | (2 | ) | | 1,810 |
| Residential mortgage and asset-backed securities | | (1 | ) | | 389 |
| | (1 | ) | | 35 |
| | (2 | ) | | 424 |
| U.S. government agencies securities | | (1 | ) | | 553 |
| | — |
| | — |
| | (1 | ) | | 553 |
| Non-U.S. government securities | | (1 | ) | | 299 |
| | — |
| | 11 |
| | (1 | ) | | 310 |
| Total | | $ | (11 | ) | | $ | 6,616 |
| | $ | (1 | ) | | $ | 212 |
| | $ | (12 | ) | | $ | 6,828 |
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| December 31, 2015 | | |
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| | |
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| | |
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| Corporate debt securities | | $ | (23 | ) | | $ | 4,891 |
| | $ | — |
| | $ | 43 |
| | $ | (23 | ) | | $ | 4,934 |
| U.S. treasury securities | | (18 | ) | | 4,342 |
| | — |
| | — |
| | (18 | ) | | 4,342 |
| Residential mortgage and asset-backed securities | | (6 | ) | | 1,626 |
| | — |
| | 20 |
| | (6 | ) | | 1,646 |
| U.S. government agencies securities | | (2 | ) | | 707 |
| | — |
| | — |
| | (2 | ) | | 707 |
| Non-U.S. government securities | | (2 | ) | | 313 |
| | — |
| | — |
| | (2 | ) | | 313 |
| Municipal debt securities | | — |
| | 21 |
| | — |
| | — |
| | — |
| | 21 |
| Total | | $ | (51 | ) | | $ | 11,900 |
| | $ | — |
| | $ | 63 |
| | $ | (51 | ) | | $ | 11,963 |
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