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Financial Instruments (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Derivative [Line Items] |  |  |
Debt instrument, offering date |  | Nov. 07, 2014 |
Fair value adjustment related to previously terminated swaps | $ 22 |  |
Fair Value Hedging | Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Derivative, notional amount |  | $ 1,613 | $ 1,438
Cash Flow Hedging | Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Derivative, notional amount |  |  | 300
Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Derivative, notional amount |  | 1,050 | 300
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Derivative, notional amount |  | 1,150 |
Debt Offering 2015 | Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Derivative, notional amount |  | 250 |
Debt Offering 2014 | Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Derivative, notional amount |  | 450 |
Debt Redemption | Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Derivative, notional amount |  | 875 |
Forward Contracts | Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Derivative, notional amount |  | $ 850 | $ 50
Minimum | Fair Value Hedging | Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Derivative, maturity date |  | Jun. 15, 2017 | Jun. 15, 2015
Minimum | Cash Flow Hedging | Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Derivative, maturity date |  |  | Jun. 15, 2025
Maximum | Fair Value Hedging | Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Derivative, maturity date |  | Jun. 15, 2022 | Jun. 15, 2022
Maximum | Cash Flow Hedging | Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Derivative, maturity date |  |  | Oct. 17, 2026

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- Definition Adjustment to the fair value of the debt instrument resulting from the termination of interest rate swap. + References No definition available. + Details
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- Definition Date the debt instrument was offered for sale, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959 + Details
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