XML 42 R30.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Financial Instruments - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Sep. 30, 2017 | Apr. 01, 2017 | Sep. 24, 2016
--- | --- | --- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | $ 270,657 | $ 268,399 |  |
Unrealized Gains | 274 | 1,278 |  |
Unrealized Losses | (3,705) | (782) |  |
Fair Value | 267,226 | 268,895 |  |
Cash and Cash Equivalents | 45,059 | 20,289 | $ 15,157 | $ 20,484
Short-Term Marketable Securities | 42,881 | 53,892 |  |
Long-Term Marketable Securities | 179,286 | 194,714 |  |
Cash |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 9,934 | 7,982 |  |
Unrealized Gains | 0 | 0 |  |
Unrealized Losses | 0 | 0 |  |
Fair Value | 9,934 | 7,982 |  |
Cash and Cash Equivalents | 9,934 | 7,982 |  |
Short-Term Marketable Securities | 0 | 0 |  |
Long-Term Marketable Securities | 0 | 0 |  |
Level 1 |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 6,542 | 7,333 |  |
Unrealized Gains | 0 | 0 |  |
Unrealized Losses | (105) | (88) |  |
Fair Value | 6,437 | 7,245 |  |
Cash and Cash Equivalents | 5,742 | 6,534 |  |
Short-Term Marketable Securities | 695 | 711 |  |
Long-Term Marketable Securities | 0 | 0 |  |
Level 1 | Money market funds |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 5,742 | 6,534 |  |
Unrealized Gains | 0 | 0 |  |
Unrealized Losses | 0 | 0 |  |
Fair Value | 5,742 | 6,534 |  |
Cash and Cash Equivalents | 5,742 | 6,534 |  |
Short-Term Marketable Securities | 0 | 0 |  |
Long-Term Marketable Securities | 0 | 0 |  |
Level 1 | Mutual funds |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 800 | 799 |  |
Unrealized Gains | 0 | 0 |  |
Unrealized Losses | (105) | (88) |  |
Fair Value | 695 | 711 |  |
Cash and Cash Equivalents | 0 | 0 |  |
Short-Term Marketable Securities | 695 | 711 |  |
Long-Term Marketable Securities | 0 | 0 |  |
Level 2 |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 254,181 | 253,084 |  |
Unrealized Gains | 274 | 1,278 |  |
Unrealized Losses | (3,600) | (694) |  |
Fair Value | 250,855 | 253,668 |  |
Cash and Cash Equivalents | 29,383 | 5,773 |  |
Short-Term Marketable Securities | 42,186 | 53,181 |  |
Long-Term Marketable Securities | 179,286 | 194,714 |  |
Level 2 | U.S. Treasury securities |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 56,737 | 55,254 |  |
Unrealized Gains | 1 | 58 |  |
Unrealized Losses | (932) | (230) |  |
Fair Value | 55,806 | 55,082 |  |
Cash and Cash Equivalents | 6,379 | 865 |  |
Short-Term Marketable Securities | 9,106 | 17,228 |  |
Long-Term Marketable Securities | 40,321 | 36,989 |  |
Level 2 | U.S. agency securities |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 5,539 | 5,162 |  |
Unrealized Gains | 0 | 2 |  |
Unrealized Losses | (39) | (9) |  |
Fair Value | 5,500 | 5,155 |  |
Cash and Cash Equivalents | 2,837 | 1,439 |  |
Short-Term Marketable Securities | 588 | 2,057 |  |
Long-Term Marketable Securities | 2,075 | 1,659 |  |
Level 2 | Non-U.S. government securities |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 8,247 | 7,827 |  |
Unrealized Gains | 88 | 210 |  |
Unrealized Losses | (137) | (37) |  |
Fair Value | 8,198 | 8,000 |  |
Cash and Cash Equivalents | 0 | 9 |  |
Short-Term Marketable Securities | 477 | 123 |  |
Long-Term Marketable Securities | 7,721 | 7,868 |  |
Level 2 | Certificates of deposit and time deposits |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 7,266 | 5,832 |  |
Unrealized Gains | 0 | 0 |  |
Unrealized Losses | 0 | 0 |  |
Fair Value | 7,266 | 5,832 |  |
Cash and Cash Equivalents | 4,611 | 1,142 |  |
Short-Term Marketable Securities | 2,021 | 3,918 |  |
Long-Term Marketable Securities | 634 | 772 |  |
Level 2 | Commercial paper |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 17,417 | 3,640 |  |
Unrealized Gains | 0 | 0 |  |
Unrealized Losses | 0 | 0 |  |
Fair Value | 17,417 | 3,640 |  |
Cash and Cash Equivalents | 15,455 | 2,146 |  |
Short-Term Marketable Securities | 1,962 | 1,494 |  |
Long-Term Marketable Securities | 0 | 0 |  |
Level 2 | Corporate securities |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 138,036 | 152,724 |  |
Unrealized Gains | 176 | 969 |  |
Unrealized Losses | (1,975) | (242) |  |
Fair Value | 136,237 | 153,451 |  |
Cash and Cash Equivalents | 101 | 172 |  |
Short-Term Marketable Securities | 27,431 | 27,591 |  |
Long-Term Marketable Securities | 108,705 | 125,688 |  |
Level 2 | Municipal securities |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 973 | 961 |  |
Unrealized Gains | 0 | 4 |  |
Unrealized Losses | (11) | (1) |  |
Fair Value | 962 | 964 |  |
Cash and Cash Equivalents | 0 | 0 |  |
Short-Term Marketable Securities | 166 | 114 |  |
Long-Term Marketable Securities | 796 | 850 |  |
Level 2 | Mortgage- and asset-backed securities |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Adjusted Cost | 19,966 | 21,684 |  |
Unrealized Gains | 9 | 35 |  |
Unrealized Losses | (506) | (175) |  |
Fair Value | 19,469 | 21,544 |  |
Cash and Cash Equivalents | 0 | 0 |  |
Short-Term Marketable Securities | 435 | 656 |  |
Long-Term Marketable Securities | $ 19,034 | $ 20,888 |  |

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + 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 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26626-111562 + Details
Name: | us-gaap_AvailableForSaleSecuritiesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26626-111562 + Details
Name: | us-gaap_AvailableForSaleSecuritiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3044-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CashMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MutualFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_BankTimeDepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |