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Debt - Summary of Term Debt (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 24, 2016
Debt Instrument [Line Items] |  |
Total term debt | $ 77,378,000,000 | $ 78,384,000,000
Unamortized premium/(discount) and issuance costs, net | (166,000,000) | (174,000,000)
Hedge accounting fair value adjustments | (156,000,000) | 717,000,000
Less: Current portion of long-term debt | (3,499,000,000) | (3,500,000,000)
Total long-term debt | 73,557,000,000 | 75,427,000,000
2013 debt issuance |  |
Debt Instrument [Line Items] |  |
Debt instrument, face amount | 17,000,000,000 |
2013 debt issuance | Floating-rate notes |  |
Debt Instrument [Line Items] |  |
Debt instrument, senior notes | $ 2,000,000,000 | $ 2,000,000,000
Debt instrument maturity year, start | 2018 |
Debt instrument maturity year, end | 2018 |
2013 debt issuance | Floating-rate notes | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument, effective interest rate | 1.10% | 1.10%
2013 debt issuance | Floating-rate notes | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument, effective interest rate | 1.10% | 1.10%
2013 debt issuance | Fixed-rate 1.000% - 3.850% notes |  |
Debt Instrument [Line Items] |  |
Debt instrument, senior notes | $ 12,500,000,000 | $ 12,500,000,000
Debt instrument maturity year, start | 2018 |
Debt instrument maturity year, end | 2043 |
2013 debt issuance | Fixed-rate 1.000% - 3.850% notes | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 1.00% |
Debt instrument, effective interest rate | 1.08% | 1.08%
2013 debt issuance | Fixed-rate 1.000% - 3.850% notes | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 3.85% |
Debt instrument, effective interest rate | 3.91% | 3.91%
2014 debt issuance |  |
Debt Instrument [Line Items] |  |
Debt instrument, face amount | $ 12,000,000,000 |
2014 debt issuance | Floating-rate notes |  |
Debt Instrument [Line Items] |  |
Debt instrument, senior notes | $ 2,000,000,000 | $ 2,000,000,000
Debt instrument maturity year, start | 2017 |
Debt instrument maturity year, end | 2019 |
2014 debt issuance | Floating-rate notes | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument, effective interest rate | 0.95% | 0.86%
2014 debt issuance | Floating-rate notes | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument, effective interest rate | 1.18% | 1.09%
2014 debt issuance | Fixed-rate 1.050% - 4.450% notes |  |
Debt Instrument [Line Items] |  |
Debt instrument, senior notes | $ 10,000,000,000 | $ 10,000,000,000
Debt instrument maturity year, start | 2017 |
Debt instrument maturity year, end | 2044 |
2014 debt issuance | Fixed-rate 1.050% - 4.450% notes | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 1.05% |
Debt instrument, effective interest rate | 0.95% | 0.85%
2014 debt issuance | Fixed-rate 1.050% - 4.450% notes | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 4.45% |
Debt instrument, effective interest rate | 4.48% | 4.48%
2015 debt issuance |  |
Debt Instrument [Line Items] |  |
Debt instrument, face amount | $ 27,300,000,000.0 |
2015 debt issuance | Floating-rate notes |  |
Debt Instrument [Line Items] |  |
Debt instrument, senior notes | $ 1,753,000,000 | $ 1,781,000,000
Debt instrument maturity year, start | 2017 |
Debt instrument maturity year, end | 2020 |
2015 debt issuance | Floating-rate notes | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument, effective interest rate | 0.95% | 0.87%
2015 debt issuance | Floating-rate notes | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument, effective interest rate | 1.87% | 1.87%
2015 debt issuance | Fixed-rate 0.350% - 4.375% notes |  |
Debt Instrument [Line Items] |  |
Debt instrument, senior notes | $ 24,225,000,000 | $ 25,144,000,000
Debt instrument maturity year, start | 2017 |
Debt instrument maturity year, end | 2045 |
2015 debt issuance | Fixed-rate 0.350% - 4.375% notes | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 0.35% |
Debt instrument, effective interest rate | 0.28% | 0.28%
2015 debt issuance | Fixed-rate 0.350% - 4.375% notes | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 4.375% |
Debt instrument, effective interest rate | 4.51% | 4.51%
2016 debt issuance |  |
Debt Instrument [Line Items] |  |
Debt instrument, face amount | $ 24,900,000,000.0 |
2016 debt issuance | Floating-rate notes |  |
Debt Instrument [Line Items] |  |
Debt instrument, senior notes | $ 1,350,000,000 | $ 1,350,000,000
Debt instrument maturity year, start | 2019 |
Debt instrument maturity year, end | 2021 |
2016 debt issuance | Floating-rate notes | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument, effective interest rate | 1.02% | 0.91%
2016 debt issuance | Floating-rate notes | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument, effective interest rate | 2.05% | 1.95%
2016 debt issuance | Fixed-rate 1.100% - 4.650% notes |  |
Debt Instrument [Line Items] |  |
Debt instrument, senior notes | $ 23,550,000,000 | $ 23,609,000,000
Debt instrument maturity year, start | 2018 |
Debt instrument maturity year, end | 2046 |
2016 debt issuance | Fixed-rate 1.100% - 4.650% notes | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 1.10% |
Debt instrument, effective interest rate | 1.13% | 1.13%
2016 debt issuance | Fixed-rate 1.100% - 4.650% notes | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate | 4.65% |
Debt instrument, effective interest rate | 4.78% | 4.58%

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