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Debt - Senior Notes (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 29, 2020 | Jan. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2014 | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2014 | Mar. 31, 2020 | Mar. 31, 2019 | Jun. 30, 2019 | Jun. 30, 2018 | Nov. 30, 2014
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption and repayment of debt |  |  |  |  |  |  |  |  | $ 996,033,000 | $ 902,474,000 |  |  |
Loss on extinguishment of debt |  |  |  |  | $ 22,538,000 |  | $ 0 |  | 22,538,000 | 0 |  |  |
Fair value of derivative contract |  |  |  |  | 19,333,000 |  | 1,379,000 |  | 17,785,000 | 6,567,000 |  |  |
Unamortized discount |  |  |  |  | 8,375,000 |  |  |  | $ 8,375,000 |  | $ 8,738,000 |  |
Treasury lock | Derivatives designated as hedging instruments | Cash flow hedge contracts - foreign currency | Fixed-rate 3.300% Senior Notes due on March 1, 2050 | Senior notes |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |
Term of contract |  | 30 years |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  | $ 350,000,000.0 |  |  |  |  |  |  |  |  |  |  |
Fair value of derivative contract |  |  |  |  | 21,500,000 |  |  |  |  |  |  |  |
Treasury lock | Derivatives designated as hedging instruments | Cash flow hedge contracts - foreign currency | 2018 Rate lock agreements | Senior notes |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000.0 |
Fair value of derivative contract |  |  |  |  |  |  | 13,600,000 |  |  |  |  |  |
Treasury lock | Derivatives designated as hedging instruments | Cash flow hedge contracts - foreign currency | Portion of senior notes | Senior notes |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |
Term of contract |  |  |  | 10 years |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  | $ 1,000,000,000.00 |  |  |  |  |  |  |  |  |
Fair value of derivative contract |  |  |  |  |  |  |  | $ (7,500,000) |  |  |  |  |
Senior notes |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  | 1,200,000,000 |  |  | 1,200,000,000 |  |  | $ 2,500,000,000
Redemption and repayment of debt |  |  | $ 250,000,000.0 |  |  |  |  |  |  |  |  |  |
Unamortized discount |  |  |  |  |  |  | $ 6,700,000 |  |  | $ 6,700,000 |  |  | $ 4,000,000.0
Redemption price |  |  |  |  |  |  |  |  | 101.00% |  |  |  |
Fair value disclosure |  |  |  |  | $ 3,680,000,000 |  |  |  | $ 3,680,000,000 |  | $ 3,700,000,000 |  |
Senior notes | Fixed-rate 3.300% Senior Notes due on March 1, 2050 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount | $ 750,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate | 3.30% |  |  |  | 3.30% |  |  |  | 3.30% |  |  |  |
Unamortized discount | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |
Senior notes | Fixed-rate 4.125% Senior Notes due on November 1, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption and repayment of debt | 500,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  | $ 22,500,000 |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  |  |  | 4.125% |  |
Revolving credit facility | Line of credit |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption and repayment of debt | $ 200,000,000.0 |  |  |  | $ 200,000,000.0 | $ 25,000,000.0 |  |  |  |  |  |  |

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