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Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2017 |
Mar. 31, 2016 |
Mar. 31, 2017 |
Mar. 31, 2016 |
Jun. 30, 2016 |
[1] |
Dec. 31, 2014 |
Nov. 30, 2014 |
Oct. 31, 2014 |
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| Senior notes | |||||||||||||
| Derivative | |||||||||||||
| Face amount | $ 2,500,000,000.0 | ||||||||||||
| Senior notes due November 1, 2024 | Senior notes | |||||||||||||
| Derivative | |||||||||||||
| Face amount | $ 1,250,000,000 | ||||||||||||
| Stated interest rate (as a percent) | 4.65% | [1] | 4.65% | [1] | 4.65% | 4.65% | |||||||
| 现金流对冲合约| |财政部锁份额n of senior notes | Senior notes | Derivatives designated as hedging instruments | |||||||||||||
| Derivative | |||||||||||||
| Notional amount of derivative | $ 1,000,000,000.00 | ||||||||||||
| Unrealized gains (losses) on cash flow hedges | $ 7,500,000 | ||||||||||||
| 现金流对冲合约| |财政部锁份额n of senior notes | Senior notes | Derivatives designated as hedging instruments | Interest expense | |||||||||||||
| Derivative | |||||||||||||
| Unrealized gains (losses) on cash flow hedges | $ 5,700,000 | $ 5,700,000 | |||||||||||
| Gain reclassified from accumulated OCI into income, effective portion | $ 200,000 | $ 200,000 | $ 600,000 | $ 600,000 | |||||||||
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