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Financial Instruments - Investments in Debt Securities (Detail) $ in Millions | Oct. 01, 2017 USD ($)
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Total Debt Securities [Line Items] |  |
Debt securities maturities within one year | $ 12,818 |
Debt securities maturities over 1 to 5 years | 3,694 |
Debt securities maturities over 5 to 10 years | 1,532 |
Debt securities maturities over 10 years | 18 |
Total debt securities | 18,061 |
Corporate debt [Member] |  |
Total Debt Securities [Line Items] |  |
Available-for-sale debt securities maturities within 1 year | 2,741 | [1]
Available-for-sale debt securities maturities over 1 to 5 years | 2,591 | [1]
Available-for-sale debt securities maturities over 5 to 10 years | 1,525 | [1]
Available-for-sale debt securities maturities over 10 years | 17 | [1]
Available-for-sale debt securities maturities total | 6,874 | [1]
Western European, Asian and other government debt [Member] |  |
Total Debt Securities [Line Items] |  |
Available-for-sale debt securities maturities within 1 year | 6,071 | [2]
Available-for-sale debt securities maturities over 1 to 5 years | 268 | [2]
Available-for-sale debt securities maturities over 5 to 10 years | 0 | [2]
Available-for-sale debt securities maturities over 10 years | 0 | [2]
Available-for-sale debt securities maturities total | 6,339 | [2]
Western European, Scandinavia and other government agency debt [Member] |  |
Total Debt Securities [Line Items] |  |
Available-for-sale debt securities maturities within 1 year | 1,955 | [2]
Available-for-sale debt securities maturities over 1 to 5 years | 42 | [2]
Available-for-sale debt securities maturities over 5 to 10 years | 0 | [2]
Available-for-sale debt securities maturities over 10 years | 0 | [2]
Available-for-sale debt securities maturities total | 1,998 | [2]
Supranational debt [Member] |  |
Total Debt Securities [Line Items] |  |
Available-for-sale debt securities maturities within 1 year | 387 | [2]
Available-for-sale debt securities maturities over 1 to 5 years | 195 | [2]
Available-for-sale debt securities maturities over 5 to 10 years | 0 | [2]
Available-for-sale debt securities maturities over 10 years | 0 | [2]
Available-for-sale debt securities maturities total | 582 | [2]
Government National Mortgage Association and other U.S. government guaranteed asset-back securities [Member] |  |
Total Debt Securities [Line Items] |  |
Available-for-sale debt securities maturities within 1 year | 42 |
Available-for-sale debt securities maturities over 1 to 5 years | 424 |
Available-for-sale debt securities maturities over 5 to 10 years | 0 |
Available-for-sale debt securities maturities over 10 years | 0 |
Available-for-sale debt securities maturities total | 466 |
Other asset-backed debt [Member] |  |
Total Debt Securities [Line Items] |  |
Available-for-sale debt securities maturities within 1 year | 161 | [3]
Available-for-sale debt securities maturities over 1 to 5 years | 61 | [3]
Available-for-sale debt securities maturities over 5 to 10 years | 3 | [3]
Available-for-sale debt securities maturities over 10 years | 0 | [3]
Available-for-sale debt securities maturities total | 226 | [3]
U.S. government debt [Member] |  |
Total Debt Securities [Line Items] |  |
Available-for-sale debt securities maturities within 1 year | 0 |
Available-for-sale debt securities maturities over 1 to 5 years | 112 |
Available-for-sale debt securities maturities over 5 to 10 years | 0 |
Available-for-sale debt securities maturities over 10 years | 0 |
Available-for-sale debt securities maturities total | 112 |
Time deposits and other [Member] |  |
Total Debt Securities [Line Items] |  |
Held-to-maturity debt securities maturities within 1 year | 1,133 |
Held-to-maturity debt securities with maturities over 1 to 5 years | 0 |
Held-to-maturity debt securities maturities over 5 to 10 years | 3 |
Held-to-maturity debt securities maturities over 10 years | 0 |
Held-to-maturity debt securities maturities total | 1,137 |
Western European government debt [Member] |  |
Total Debt Securities [Line Items] |  |
Held-to-maturity debt securities maturities within 1 year | 326 | [2]
Held-to-maturity debt securities with maturities over 1 to 5 years | 0 | [2]
Held-to-maturity debt securities maturities over 5 to 10 years | 0 | [2]
Held-to-maturity debt securities maturities over 10 years | 0 | [2]
Held-to-maturity debt securities maturities total | $ 326 | [2]
[1] | Issued by a diverse group of corporations, with a significant concentration in the technology sector, virtually all of which are investment-grade.
[2] | Issued by governments, government agencies or supranational entities, as applicable, all of which are high quality.
[3] | Includes receivable-backed, loan-backed, and mortgage-backed securities, all of which are high quality and in senior positions in the capital structure of the security. Receivable-backed securities are collateralized by credit cards receivables, loan-backed securities are collateralized by senior secured obligations of a diverse pool of companies or student loans, and mortgage-backed securities are collateralized by diversified pools of residential and commercial mortgages.

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- Definition Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.6) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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