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Long Term Debt (Detail) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Debt Instrument [Line Items] |  |
Total debt | $ 15,294 | $ 16,296
Less: unamortized discounts and issuance costs | (1,012) | (1,035)
Total debt, net | 14,282 | 15,261
Less: current portion |  | (956)
Long-term debt, net | 14,282 | 14,305
2.13% and 7.65% due 2016 |  |
Debt Instrument [Line Items] |  |
Total debt |  | 952
1.85% due 2018 |  |
Debt Instrument [Line Items] |  |
Total debt | 750 | 750
4.25% due 2019 |  |
Debt Instrument [Line Items] |  |
Total debt | 900 | 900
2.50% due 2020 |  |
Debt Instrument [Line Items] |  |
Total debt | 1,250 | 1,250
3.35% due 2021 |  |
Debt Instrument [Line Items] |  |
Total debt | 900 | 900
3.10% due 2023 |  |
Debt Instrument [Line Items] |  |
Total debt | 500 | 500
2.90% Due 2025 |  |
Debt Instrument [Line Items] |  |
Total debt | 750 | 750
3.55% due 2026 |  |
Debt Instrument [Line Items] |  |
Total debt | 2,000 | 2,000
3.60% Due 2035 |  |
Debt Instrument [Line Items] |  |
Total debt | 500 | 500
4.50% and 6.15% due 2036 |  |
Debt Instrument [Line Items] |  |
Total debt | 1,152 | 1,152
4.85% due 2041 |  |
Debt Instrument [Line Items] |  |
Total debt | 600 | 600
4.07% due 2042 |  |
Debt Instrument [Line Items] |  |
Total debt | 1,336 | 1,336
3.80% due 2045 |  |
Debt Instrument [Line Items] |  |
Total debt | 1,000 | 1,000
4.70% due 2046 |  |
Debt Instrument [Line Items] |  |
Total debt | 2,000 | 2,000
Other notes with rates from 5.50% to 8.50%, due 2023 to 2040 |  |
Debt Instrument [Line Items] |  |
Total debt | $ 1,656 | $ 1,706

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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