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Long -Term Debt - Narrative (Details) - USD ($) $ in Millions |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 07, 2018 | Nov. 07, 2012 | Feb. 14, 2012 | Jun. 30, 2020 | Jun. 30, 2019
Long Term Debt (Additional Textual) [Abstract] |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in 2022 |  |  |  | $ 300.0 |
Future Principal Maturities of Long-term Debt in 2028 |  |  |  | $ 300.0 |
US Dollar Denominated Borrowings [Member] |  |  |  |  |
Long-Term Debt (Textual) [Abstract] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 0.00% | 0.00%
Capital Lease Obligations [Member] |  |  |  |  |
Long-Term Debt (Textual) [Abstract] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 0.00% |
4.625% Senior Unsecured Notes Due in 2028 |  |  |  |  |
Long-Term Debt (Textual) [Abstract] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.625% |  |  |  |
Debt Instrument, Unamortized Discount |  |  |  | $ 0.0 | $ 2.0
Long Term Debt (Additional Textual) [Abstract] |  |  |  |  |
Proceeds from Issuance of Senior Long-term Debt | $ 300.0 |  |  |  |
2.650% Senior Notes due 2020 [Member] |  |  |  |  |
Long-Term Debt (Textual) [Abstract] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 2.65% |  |  |
Debt Instrument, Unamortized Discount |  |  |  | 0.0 | 0.0
Long Term Debt (Additional Textual) [Abstract] |  |  |  |  |
Proceeds from Issuance of Senior Long-term Debt |  | $ 400.0 |  |  |
3.875% Senior Unsecured Notes Due in 2022 [Member] |  |  |  |  |
Long-Term Debt (Textual) [Abstract] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 3.875% |  |
Debt Instrument, Unamortized Discount |  |  |  | 0.0 | 0.1
Long Term Debt (Additional Textual) [Abstract] |  |  |  |  |
Proceeds from Issuance of Senior Long-term Debt |  |  | $ 300.0 |  |
Twenty Eighteen Credit Agreement [Member] [Domain] |  |  |  |  |
Long-Term Debt (Textual) [Abstract] |  |  |  |  |
Maximum Borrowing Capacity under the 2018 Credit Agreement | $ 700.0 |  |  |  |
Borrowing outstanding under 2018 Credit Agreement |  |  |  | $ 500.0 | $ 0.0
Term of Long Term Debt |  |  |  | 5 years |

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- Definition Long term debt and capital leases. + References No definition available. + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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