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Debt and Credit Agreements (Details 3) - Revolving credit facility - USD ($) | Apr. 17, 2015 | Jun. 30, 2015 | Apr. 16, 2015
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Debt Instrument [Line Items] |  |  |
Borrowing base | $ 3,400,000,000.0 |  | $ 3,100,000,000.0
Current borrowing capacity | 1,800,000,000 |  | $ 1,400,000,000
Availability under the credit facility |  | $ 1,400,000,000 |
Accordion Feature, Amended Facility |  |  |
Debt Instrument [Line Items] |  |  |
Borrowing base | $ 500,000,000 |  |
Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Commitment fee on the unused available balance | 0.30% |  |
Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Commitment fee on the unused available balance | 0.50% |  |
Eurodollar LIBOR |  |  |
Debt Instrument [Line Items] |  |  |
Description of variable rate basis | Eurodollar (LIBOR) |  |
Alternate base rate (ABR) |  |  |
Debt Instrument [Line Items] |  |  |
Description of variable rate basis | alternate base rate (ABR) |  |
Debt Instrument Leverage Ratio Less than 1.0x | Eurodollar LIBOR |  |  |
Interest Rates Under Amended Credit Facility |  |  |
Basis spread on variable rate | 1.50% |  |
Debt Instrument Leverage Ratio Less than 1.0x | Alternate base rate (ABR) |  |  |
Interest Rates Under Amended Credit Facility |  |  |
Basis spread on variable rate | 0.50% |  |
Debt Instrument Leverage Ratio Greater than or Equal to 1.0x but Less than 2.0x | Eurodollar LIBOR |  |  |
Interest Rates Under Amended Credit Facility |  |  |
Basis spread on variable rate | 1.75% |  |
Debt Instrument Leverage Ratio Greater than or Equal to 1.0x but Less than 2.0x | Alternate base rate (ABR) |  |  |
Interest Rates Under Amended Credit Facility |  |  |
Basis spread on variable rate | 0.75% |  |
Debt Instrument Leverage Ratio Greater than or Equal to 2.0x but Less 3.0x | Eurodollar LIBOR |  |  |
Interest Rates Under Amended Credit Facility |  |  |
Basis spread on variable rate | 2.00% |  |
Debt Instrument Leverage Ratio Greater than or Equal to 2.0x but Less 3.0x | Alternate base rate (ABR) |  |  |
Interest Rates Under Amended Credit Facility |  |  |
Basis spread on variable rate | 1.00% |  |
Debt Instrument Leverage Ratio Greater than or Equal to 3.0x | Eurodollar LIBOR |  |  |
Interest Rates Under Amended Credit Facility |  |  |
Basis spread on variable rate | 2.25% |  |
Debt Instrument Leverage Ratio Greater than or Equal to 3.0x | Alternate base rate (ABR) |  |  |
Interest Rates Under Amended Credit Facility |  |  |
Basis spread on variable rate | 1.25% |  |

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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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