Income Taxes - Effective Income Tax Rate Reconciliation (Parenthetical) (Detail) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Jun. 30, 2017	Jun. 30, 2017		Jun. 30, 2016	Jun. 30, 2015
Income Taxes Disclosure [Line Items]
Fixed-asset impairment charges		$ 464	$ 679
Reduction of tax benefit of consolidated pre-tax losses measured at the U.S. statutory rate			98
Foreign tax authority settlement, net income tax expense			63
Non-cash impairment charge			785		$ 0	$ 0
Non-cash impairment charge			$ 48	[1]	$ 0
Effective tax rate	[2]		(5.00%)		(30.00%)	34.00%
Goodwill [Member]
Income Taxes Disclosure [Line Items]
Non-deductible goodwill and asset impairment			$ 12
United Kingdom Fixed Assets [Member]
Income Taxes Disclosure [Line Items]
Non-cash impairment charge			360
Non-deductible goodwill and asset impairment			29
U.S. Federal [Member] | Valuation Allowance, Operating Loss Carryforwards [Member]
Income Taxes Disclosure [Line Items]
Change in valuation allowance tax benefit					$ 106
Foreign Tax Authority [Member]
Income Taxes Disclosure [Line Items]
Fixed-asset impairment charges			1,000
Foreign Tax Authority [Member] | Valuation Allowance, Operating Loss Carryforwards [Member]
Income Taxes Disclosure [Line Items]
Change in valuation allowance tax benefit			$ 40

[1] In the News and Information Services segment, the write-down of goodwill primarily relates to a reporting unit in the UK. In the Digital Real Estate Services segment, the write-down of goodwill relates to the Company's DIAKRIT reporting unit.

[2] For the fiscal year ended June 30, 2017, the effective tax rate of (5)% represents income tax expense when compared to consolidated pre-tax book loss. For the fiscal year ended June 30, 2016, the effective tax rate of (30)% represents income tax benefit when compared to consolidated pre-tax book income. For the fiscal year ended June 30, 2015, the effective tax rate of 34% represents an income tax expense when compared to consolidated pre-tax book income. As a result, certain reconciling items between the U.S. federal income tax rate and the Company's effective tax rate may have the opposite impact.