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Financial Data By Segment And Geographic Area (Financial Data By Strategic Business Unit Segment) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 15,005.4 | $ 14,589.8 | $ 14,110.2
Earnings before income taxes | 3,361.2 | 3,182.6 | 3,005.6
Assets | 48,772.5 | 39,165.5 | 41,887.7
Capital expenditures | 178.3 | 168.3 | 162.7
Depreciation and amortization | 510.7 | 480.0 | 409.0
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | (8.1) | (8.3) | (10.3)
Earnings before income taxes | (409.7) | (484.9) | (561.9)
Assets | (3,050.2) | 650.6 | 5,697.3
Capital expenditures | 61.6 | 52.6 | 64.5
Depreciation and amortization | 81.6 | 88.6 | 84.5
Employer Services | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 10,195.2 | 10,086.6 | 9,942.8
Earnings before income taxes | 3,052.1 | 3,058.2 | 2,954.2
Assets | 50,279.3 | 37,071.7 | 34,606.3
Capital expenditures | 116.7 | 115.7 | 98.2
Depreciation and amortization | 421.7 | 388.0 | 321.0
PEO Services | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 4,818.3 | 4,511.5 | 4,177.7
Earnings before income taxes | 718.8 | 609.3 | 613.3
Assets | 1,543.4 | 1,443.2 | 1,584.1
Capital expenditures | 0.0 | 0.0 | 0.0
Depreciation and amortization | $ 7.4 | $ 3.4 | $ 3.5

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