Summary of Financing Arrangements | The following table summarizes the carrying amount of our borrowings under various financing arrangements (in millions): | | | | | | | | | | | | | | | | | | | | | | | | December 31, | Type of Borrowing | | Issue Date | | Due Date | | Interest Rate | | 2016 | | 2015 (1) | Convertible Notes | | July 2010 | | May 2016 | | 1.625% | | $ | — |
| | $ | 283 |
| Senior Unsecured | | December 2011 | | December 2016 | | 3.05% | | — |
| | 699 |
| Senior Unsecured | | September 2015 | | September 2018 | | 1.85% | | 998 |
| | 997 |
| Senior Unsecured | | March 2014 | | April 2019 | | 2.05% | | 499 |
| | 498 |
| Senior Unsecured | | November 2014 | | February 2020 | | 2.35% | | 498 |
| | 497 |
| Senior Unsecured | | September 2015 | | September 2020 | | 2.55% | | 1,991 |
| | 1,989 |
| Senior Unsecured | | March 2011 | | April 2021 | | 4.50% | | 994 |
| | 992 |
| Senior Unsecured | | December 2011 | | December 2021 | | 4.40% | | 1,245 |
| | 1,244 |
| Senior Unsecured | | September 2016 | | March 2022 | | 1.95% | | 497 |
| | — |
| Senior Unsecured | | September 2015 | | September 2022 | | 3.25% | | 995 |
| | 995 |
| Senior Unsecured | | September 2016 | | September 2023 | | 2.50% | | 744 |
| | — |
| Senior Unsecured | | March 2014 | | April 2024 | | 3.70% | | 1,741 |
| | 1,740 |
| Senior Unsecured | | November 2014 | | February 2025 | | 3.50% | | 1,743 |
| | 1,742 |
| Senior Unsecured | | September 2015 | | March 2026 | | 3.65% | | 2,726 |
| | 2,724 |
| Senior Unsecured | | September 2016 | | March 2027 | | 2.95% | | 1,243 |
| | — |
| Senior Unsecured | | September 2015 | | September 2035 | | 4.60% | | 989 |
| | 988 |
| Senior Unsecured | | September 2016 | | September 2036 | | 4.00% | | 739 |
| | — |
| Senior Unsecured | | December 2011 | | December 2041 | | 5.65% | | 995 |
| | 995 |
| Senior Unsecured | | March 2014 | | April 2044 | | 4.80% | | 1,732 |
| | 1,732 |
| Senior Unsecured | | November 2014 | | February 2045 | | 4.50% | | 1,729 |
| | 1,728 |
| Senior Unsecured | | September 2015 | | March 2046 | | 4.75% | | 2,214 |
| | 2,212 |
| Senior Unsecured | | September 2016 | | March 2047 | | 4.15% | | 1,723 |
| | — |
| Floating-rate Borrowings | | May 2016 | | May 2019 | | Variable | | 311 |
| | — |
| Total debt, net | | 26,346 |
| | 22,055 |
| Less current portion | | — |
| | 982 |
| Total long-term debt, net | | $ | 26,346 |
| | $ | 21,073 |
| _______________________ | | | | | | | | | | |
|
Summary of Information about May 2016 Convertible Senior Notes | The following table summarizes information about the equity and liability components of the Convertible Notes (in millions): | | | | | | | | | | | | | | | | | | | | | | | | | | | | Carrying Value of Equity Component | | Net Carrying Amount of Liability Component | | Unamortized Discount of Liability Component | | | December 31, | | December 31, | | December 31, | | | 2016 | | 2015 | | 2016 | | 2015 | | 2016 | | 2015 | Convertible Notes | | $ | — |
| | $ | 35 |
| | $ | — |
| | $ | 283 |
| | $ | — |
| | $ | (2 | ) |
|
Schedule of Contractual Maturities of Financing Obligations | As of December 31, 2016, the aggregate future principal maturities of financing obligations for each of the next five years, based on contractual due dates, are as follows (in millions): | | | | | | | | | | | | | | | | | | | | | | | | 2017 | | 2018 | | 2019 | | 2020 | | 2021 | Contractual Maturities | | $ | — |
| | $ | 1,000 |
| | $ | 812 |
| | $ | 2,500 |
| | $ | 2,250 |
|
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