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Employee Benefit Plans - Fair Value of Plan Assets (Details) - USD ($) | Jun. 30, 2018 | Jun. 30, 2017
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Fair Value Measurements |  |  |  |
Bonds, equity securities and other investments | $ 1,475,936,000 |  | $ 1,863,689,000 |
Total assets measured at fair value | $ 2,554,605,000 | [1] | $ 2,858,005,000 | [2]
Foreign Plan | Pension Plan |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Defined benefit plan, target plan asset allocations | 100.00% |  | 100.00% |
Defined benefit plan, estimated future employer contributions in next fiscal year | $ 2,600,000 |  |  |
Defined benefit plan maximum yearly expected future benefit | 3,500,000.0 |  |  |
Fair Value Measurements |  |  |  |
Cash and cash equivalents | 15,737,000 |  | $ 13,784,000 |
Bonds, equity securities and other investments | 12,195,000 |  | 7,996,000 |
Total assets measured at fair value | 27,932,000 |  | 21,780,000 |
Level 1 |  |  |  |
Fair Value Measurements |  |  |  |
Total assets measured at fair value | 1,670,770,000 | [1] | 1,493,604,000 | [2]
Level 1 | Foreign Plan | Pension Plan |  |  |  |
Fair Value Measurements |  |  |  |
Cash and cash equivalents | 15,737,000 |  | 13,784,000 |
Bonds, equity securities and other investments | 0 |  | 0 |
Total assets measured at fair value | 15,737,000 |  | 13,784,000 |
Level 2 |  |  |  |
Fair Value Measurements |  |  |  |
Total assets measured at fair value | 883,835,000 | [1] | 1,364,401,000 | [2]
Level 2 | Foreign Plan | Pension Plan |  |  |  |
Fair Value Measurements |  |  |  |
Cash and cash equivalents | 0 |  | 0 |
Bonds, equity securities and other investments | 12,195,000 |  | 7,996,000 |
Total assets measured at fair value | $ 12,195,000 |  | $ 7,996,000 |
[1] | Excludes cash of $473.8 million held in operating accounts and time deposits of $54.5 million as of June 30, 2018.
[2] | Excludes cash of $307.4 million held in operating accounts and time deposits of $39.4 million as of June 30, 2017.

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5)(i) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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