Income Taxes - Earnings from Continuing Operations before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Earnings before income taxes:
U.S.									$ 604.4	$ 492.4	$ 526.4
Foreign									91.8	87.2	80.8
Total	$ 336.4	$ 216.9	$ 69.4	$ 73.6	$ 294.8	$ 210.5	$ 10.5	$ 63.8	$ 696.2	$ 579.5	$ 607.3

Amount, before tax, of income (loss) attributable to parent. Includes, but is not limited to, income (loss) from continuing operations, discontinued operations and equity method investments.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
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The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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