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Debt (Narrative) (Details) - USD ($) |  |  |  |  |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 03, 2017 | May 14, 2015 | Dec. 02, 2014 | May 28, 2014 | Nov. 05, 2013 | May 22, 2013 | May 18, 2011 | May 13, 2010 | Jun. 30, 2017 | Jul. 01, 2016 | Jul. 03, 2015 | Jan. 15, 2015 | Apr. 30, 2013
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  | $ 700,000,000 |
Sub-limit for issuance of letters of credit under revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |  | $ 75,000,000
Line of Credit Facility Letters of Credit Outstanding |  |  |  |  |  |  |  |  | $ 0 |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  | $ (7,000,000) | $ 3,000,000 | $ (74,000,000) |  |
Senior Notes 3.75 Percent due November 2018 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  | $ 800,000,000 |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 3.75% |  |  |  | 3.75% | 3.75% |  |  |
Redemption price as percentage of principal amount (percent) |  |  |  |  | 100.00% |  |  |  |  |  |  |  |
Basis spread on variable rate (basis points) |  |  |  |  | 50.00% |  |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  |  |  |  |  |  |  |  | $ 90,000,000 |  |  |  |
Senior Notes 6.875 Percent due May 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  | $ 600,000,000 |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  |  |  |  | 6.875% |  |  |  |  |
Redemption price as percentage of principal amount (percent) |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
Basis spread on variable rate (basis points) |  |  |  |  |  |  |  | 50.00% |  |  |  |  |
Debt Instrument, Applicable Premium Percentage of Principal Amount |  |  |  |  |  |  |  | 1.00% |  |  |  |  |
Senior Notes 7.00 Percent due November 2021 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  | $ 600,000,000 |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  |  |  | 7.00% |  |  | 7.00% |  |  |
Redemption price as percentage of principal amount (percent) |  |  |  |  |  |  | 100.00% |  |  |  |  |  |
Basis spread on variable rate (basis points) |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  |  |  |  |  |  |  |  |  | $ 1,000,000 | 93,000,000 |  |
Extinguishment of debt, principal amount |  |  |  |  |  |  |  |  | (158,000,000) |  |  |  |
Debt Instrument, Applicable Premium Percentage of Principal Amount |  |  |  |  |  |  | 1.00% |  |  |  |  |  |
Debt Instrument, Redemption with Net Proceeds from Equity Offerings as Percentage of Principal |  |  |  |  |  |  | 35.00% |  |  |  |  |  |
Debt Instrument, Future Redemption Price as Percentage of Original Principal |  |  |  |  |  |  | 107.00% |  |  |  |  |  |
Senior Notes 4.25 Percent Due March 2022 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount | $ 750,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 4.25% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes 4.75 Percent Due June 2023 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  |  | 4.75% |  |  |  |  |  |  |
Redemption price as percentage of principal amount (percent) |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Basis spread on variable rate (basis points) |  |  |  |  |  | 50.00% |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  |  |  |  |  |  |  |  | 39,000,000 | $ 10,000,000 |  |  |
Gain (Loss) on Repurchase of Debt Instrument |  |  |  |  |  |  |  |  | $ 0 |  |  |  |
Senior Notes 4.875 Percent Due March 2024 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 4.875% |  |  |  |  |  |  |  | 4.875% | 4.875% |  |  |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes 4.75 Percent Due January 2025 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  | 4.75% |  |  |  |  | 4.75% | 4.75% |  |  |
Redemption price as percentage of principal amount (percent) |  |  |  | 100.00% |  |  |  |  |  |  |  |  |
Basis spread on variable rate (basis points) |  |  |  | 50.00% |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  |  |  |  |  |  |  |  | $ 20,000,000 | $ 5,000,000 |  |  |
Senior Note 4.875 percent Due June 2027 [Domain] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 700,000,000.0 |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  | 4.875% |  |  |  |  |  |  | 4.875% | 4.875% |  |  |
Redemption price as percentage of principal amount (percent) |  | 100.00% |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (basis points) |  | 40.00% |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  |  |  |  |  |  |  |  | $ 4,000,000 |  |  |  |
Senior note 5.75 percent due December 2034 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  | $ 500,000,000.0 |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  | 5.75% |  |  |  |  |  | 5.75% | 5.75% |  |  |
Redemption price as percentage of principal amount (percent) |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (basis points) |  |  | 50.00% |  |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  |  |  |  |  |  |  |  |  | $ 10,000,000 |  |  |
Other nonoperating income, net [Member] | Senior Notes 3.75 Percent due November 2018 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Repurchase of Debt Instrument |  |  |  |  |  |  |  |  | $ 3,000,000 |  |  |  |
Other nonoperating income, net [Member] | Senior Notes 6.875 Percent due May 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Repurchase of Debt Instrument |  |  |  |  |  |  |  |  | 26,000,000 |  |  |  |
Other nonoperating income, net [Member] | Senior Notes 7.00 Percent due November 2021 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Repurchase of Debt Instrument |  |  |  |  |  |  |  |  |  | 13,000,000 | $ 0 |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  | (5,000,000) |  |  |  |
Other nonoperating income, net [Member] | Senior Notes 4.75 Percent Due June 2023 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Repurchase of Debt Instrument |  |  |  |  |  |  |  |  |  | 0 |  |  |
Other nonoperating income, net [Member] | Senior Notes 4.875 Percent Due March 2024 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Repurchase of Debt Instrument |  |  |  |  |  |  |  |  | 0 |  |  |  |
Other nonoperating income, net [Member] | Senior Notes 4.75 Percent Due January 2025 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Repurchase of Debt Instrument |  |  |  |  |  |  |  |  | $ (1,000,000) | 0 |  |  |
Other nonoperating income, net [Member] | Senior note 5.75 percent due December 2034 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Repurchase of Debt Instrument |  |  |  |  |  |  |  |  |  | $ (3,000,000) |  |  |
Treasury Rate [Member] | Senior Notes 4.25 Percent Due March 2022 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (basis points) | 0.40% |  |  |  |  |  |  |  |  |  |  |  |
Treasury Rate [Member] | Senior Notes 4.875 Percent Due March 2024 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (basis points) | 0.045% |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The "applicable premium" will be equal to the greater of (1) this percentage of the principal amount of the notes, or (2) the excess, if any, of (a) the present value of the redemption price on a certain specified date plus interest payments due through the specified date, discounted at the applicable Treasury rate as of the redemption date plus basis points at a specified amount over (b) the principal amount of such note. + References No definition available. + Details
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- 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
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the 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)) -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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