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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Financial Information about Industry Segments (Schedule of Financial Information by Segment) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information, Additional Information [Abstract]
Revenues	$ 788.1	$ 648.8	$ 417.7	$ 392.8	$ 445.4	$ 425.4	$ 442.6	$ 399.9	$ 2,247.4	$ 1,713.3	$ 1,649.6
Income from operations	73.0	(68.1)	37.3	56.8	68.5	70.0	109.8	60.8	99.0	309.1	130.6
Non-operating expenses, net									(11.7)	0.0	0.0
Interest expense, net									(96.9)	(18.8)	(20.4)
Earnings (loss) from continuing operations before income taxes									(9.6)	290.3	110.2
Depreciation and amortization									129.0	53.8	59.1
Assets	6,727.2				2,729.7				6,727.2	2,729.7
Capital expenditures									53.2	34.8	25.0
Operating Segments
Segment Reporting Information, Additional Information [Abstract]
Revenues									2,248.9	1,713.3	1,649.6
Intersegment Eliminations
Segment Reporting Information, Additional Information [Abstract]
Revenues	(0.8)	(0.7)	0.0	0.0					(1.5)	0.0	0.0
Unallocated corporate
Segment Reporting Information, Additional Information [Abstract]
Income from operations									(187.6)	(52.3)	(10.2)
Depreciation and amortization									2.9	1.5	2.1
Assets	364.3				117.7				364.3	117.7	94.2
Capital expenditures									21.2	18.1	3.0
National Media Acquisition
Segment Reporting Information, Additional Information [Abstract]
Revenues	590.0	479.3	247.5	239.0	293.2	283.3	259.4	247.3	1,555.8	1,083.2
Income from operations	48.0	9.0	12.2	28.3	34.3	41.3	46.8	24.1	97.5	146.5
National Media Acquisition \| Operating Segments
Segment Reporting Information, Additional Information [Abstract]
Revenues									1,555.8	1,083.2	1,101.2
Income from operations									97.5	146.5	(17.7)
Depreciation and amortization									92.9	17.5	18.7
Assets	5,158.3				1,487.1				5,158.3	1,487.1	1,478.2
Capital expenditures									11.0	4.5	4.7
Local Media Acquisition
Segment Reporting Information, Additional Information [Abstract]
Revenues	198.9	170.2	170.2	153.8	152.2	142.1	183.2	152.6	693.1	630.1
Income from operations	58.8	$ 38.9	$ 50.5	$ 40.9	46.3	$ 41.2	$ 76.8	$ 50.6	189.1	214.9
Local Media Acquisition \| Operating Segments
Segment Reporting Information, Additional Information [Abstract]
Revenues									693.1	630.1	548.4
Income from operations									189.1	214.9	158.5
Depreciation and amortization									33.2	34.8	38.3
Assets	1,204.6				1,124.9				1,204.6	1,124.9	1,054.4
Capital expenditures									22.1	12.2	17.3
Segments
Segment Reporting Information, Additional Information [Abstract]
Assets	$ 6,727.2				$ 2,729.7				6,727.2	2,729.7	2,626.8
Capital expenditures									$ 54.3	$ 34.8	$ 25.0