Restructuring Accruals (Schedule of Changes in the Restructuring Accrual) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Restructuring Reserve [Roll Forward]
Balance at beginning of year	$ 8.7
Accrual on Time’s opening balance sheet	45.1
Accruals	106.3
Cash payments	(51.6)
Other accruals	(0.1)
Reversal of excess accrual	(0.8)
Balance at end of year	107.6	$ 8.7
Employee Terminations
Restructuring Reserve [Roll Forward]
Balance at beginning of year	8.7	7.4
Accrual on Time’s opening balance sheet	38.5	0.0
Accruals	104.9	11.9
Cash payments	(49.9)	(8.8)
Other accruals	(0.1)	0.0
Reversal of excess accrual	(0.8)	(1.8)	$ (3.2)
Balance at end of year	101.3	8.7	$ 7.4
Other Exit Costs
Restructuring Reserve [Roll Forward]
Balance at beginning of year	0.0
Accrual on Time’s opening balance sheet	6.6
Accruals	1.4
Cash payments	(1.7)
Other accruals	0.0
Reversal of excess accrual	0.0
Balance at end of year	$ 6.3	$ 0.0