Assets Held-for-Sale, Discontinued Operations, and Dispositions (Major Components of Assets and Liabilities Held-for-Sale) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018
Current assets
Total current assets	$ 321.0	$ 719.8
Current liabilities
Total current liabilities	252.1	200.0
Discontinued operations, held-for-sale
Current assets
Cash and cash equivalents	5.1	2.3
Accounts receivable, net	78.1	91.4
Inventories	0.1	0.9
Current portion of subscription acquisition costs	34.4	10.4
Other current assets	0.8	5.9
Total current assets	118.5	110.9
Net property, plant, and equipment	14.3	14.1
Subscription acquisition costs	0.0	4.2
Other assets	20.2	1.0
Intangible assets, net	43.9	112.1
Goodwill	124.1	477.5
Total assets held-for-sale	321.0	719.8
Current liabilities
Accounts payable	45.2	44.9
Accrued expenses and other liabilities	27.8	14.7
Current portion of unearned revenues	67.9	110.6
Deferred sale proceeds	73.2	0.0
Total current liabilities	214.1	170.2
Unearned revenues	37.6	29.1
Other noncurrent liabilities	0.4	0.7
Total liabilities associated with assets held-for-sale	$ 252.1	$ 200.0