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Fair Value Measurements and Investments Debt Instrument Fair Value (Details) - USD ($) $ in Millions | Jun. 29, 2018 | Jun. 30, 2017
--- | --- | ---
0.50% convertible senior notes due 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, interest rate (percentage) |  | 0.50% |
7.375% senior secured notes due 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, interest rate (percentage) |  | 7.375% |
1.50% convertible notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, interest rate (percentage) |  | 1.50% |
10.50% senior unsecured notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, interest rate (percentage) |  | 10.50% |
4.750% senior unsecured notes due 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, interest rate (percentage) |  | 4.75% |
Carrying Value |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | $ 10,672 | $ 13,151
Carrying Value | 0.50% convertible senior notes due 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 31 | 30
Carrying Value | Variable interest rate Term Loan A maturing 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 0 | 4,074
Carrying Value | Variable interest rate Term Loan A-1 maturing 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 4,982 | 0
Carrying Value | Variable interest rate U.S. Term Loan B-2 maturing 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 0 | 2,968
Carrying Value | Variable interest rate U.S. Term Loan B-4 maturing 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 2,448 | 0
Carrying Value | Variable interest rate Euro Term Loan B-2 maturing 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt | [1] | 0 | 1,000
Carrying Value | 7.375% senior secured notes due 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 0 | 1,835
Carrying Value | 1.50% convertible notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 931 | 0
Carrying Value | 10.50% senior unsecured notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 0 | 3,244
Carrying Value | 4.750% senior unsecured notes due 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 2,280 | 0
Level 2 | Fair Value |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 10,851 | 14,181
Level 2 | Fair Value | 0.50% convertible senior notes due 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 34 | 34
Level 2 | Fair Value | Variable interest rate Term Loan A maturing 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 0 | 4,130
Level 2 | Fair Value | Variable interest rate Term Loan A-1 maturing 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 5,013 | 0
Level 2 | Fair Value | Variable interest rate U.S. Term Loan B-2 maturing 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 0 | 2,989
Level 2 | Fair Value | Variable interest rate U.S. Term Loan B-4 maturing 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 2,452 | 0
Level 2 | Fair Value | Variable interest rate Euro Term Loan B-2 maturing 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt | [1] | 0 | 1,010
Level 2 | Fair Value | 7.375% senior secured notes due 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 0 | 2,062
Level 2 | Fair Value | 1.50% convertible notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 1,114 | 0
Level 2 | Fair Value | 10.50% senior unsecured notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | 0 | 3,956
Level 2 | Fair Value | 4.750% senior unsecured notes due 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | $ 2,238 | $ 0
[1] | Euro Term Loan B-2 outstanding principal amount as of June 30, 2017 was based upon the Euro to U.S. dollar exchange rate as of that date.

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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