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Commitments and Contingencies - 32BJ ("Union") Pension Plan and Health Plan (Narrative) (Details) - Building Service 32BJ - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021
Pension Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
Plan contributions | $ 317.9 | $ 305.7 | $ 290.1
Health Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
Plan contributions | $ 1,900.0 | $ 1,600.0 | $ 1,500.0

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