Supplemental Guarantor Information (Supplemental Condensed Consolidating Statements of Cash Flows) (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
OPERATING ACTIVITIES
Net cash provided by operating activities from continuing operations	$ 504	$ 1,232
INVESTING ACTIVITIES
Property, plant and equipment	(238)	(117)
Investments	69	(133)
Net cash used in investing activities from continuing operations	(169)	(250)
FINANCING ACTIVITIES
Borrowings	1,282	879
Repayment of borrowings	(1,411)	(546)
Repurchase of shares	0	(619)
Dividends paid and distributions	(512)	(481)
Other financing activities, net	(50)	(53)
Net cash used in financing activities from continuing operations	(691)	(820)
Discontinued operations
Net decrease in cash and cash equivalents from discontinued operations	(26)	(15)
Net (decrease) increase in cash and cash equivalents	(382)	147
Cash and cash equivalents, beginning of year	6,163	4,424
Exchange movement on cash balances	28	(41)
Cash and cash equivalents, end of period	5,809	4,530
Legal Entities | 21st Century Fox America, Inc.
OPERATING ACTIVITIES
Net cash provided by operating activities from continuing operations	177	(957)
INVESTING ACTIVITIES
Property, plant and equipment	(90)	(9)
Investments	(59)	(85)
Net cash used in investing activities from continuing operations	(149)	(94)
FINANCING ACTIVITIES
Borrowings	0	842
Repayment of borrowings	0	(400)
Repurchase of shares		0
Dividends paid and distributions	0	0
Other financing activities, net	(29)	(34)
Net cash used in financing activities from continuing operations	(29)	408
Discontinued operations
Net decrease in cash and cash equivalents from discontinued operations	(26)	(15)
Net (decrease) increase in cash and cash equivalents	(27)	(658)
Cash and cash equivalents, beginning of year	40	661
Exchange movement on cash balances	0	0
Cash and cash equivalents, end of period	13	3
Legal Entities | Twenty-First Century Fox
OPERATING ACTIVITIES
Net cash provided by operating activities from continuing operations	(455)	1,532
INVESTING ACTIVITIES
Property, plant and equipment	0	0
Investments	0	0
Net cash used in investing activities from continuing operations	0	0
FINANCING ACTIVITIES
Borrowings	0	0
Repayment of borrowings	0	0
Repurchase of shares		(619)
Dividends paid and distributions	(333)	(335)
Other financing activities, net	0	0
Net cash used in financing activities from continuing operations	(333)	(954)
Discontinued operations
Net decrease in cash and cash equivalents from discontinued operations	0	0
Net (decrease) increase in cash and cash equivalents	(788)	578
Cash and cash equivalents, beginning of year	4,882	2,019
Exchange movement on cash balances	0	0
Cash and cash equivalents, end of period	4,094	2,597
Legal Entities | Non-Guarantor
OPERATING ACTIVITIES
Net cash provided by operating activities from continuing operations	782	657
INVESTING ACTIVITIES
Property, plant and equipment	(148)	(108)
Investments	128	(48)
Net cash used in investing activities from continuing operations	(20)	(156)
FINANCING ACTIVITIES
Borrowings	1,282	37
Repayment of borrowings	(1,411)	(146)
Repurchase of shares		0
Dividends paid and distributions	(179)	(146)
Other financing activities, net	(21)	(19)
Net cash used in financing activities from continuing operations	(329)	(274)
Discontinued operations
Net decrease in cash and cash equivalents from discontinued operations	0	0
Net (decrease) increase in cash and cash equivalents	433	227
Cash and cash equivalents, beginning of year	1,241	1,744
Exchange movement on cash balances	28	(41)
Cash and cash equivalents, end of period	1,702	1,930
Reclassifications and Eliminations
OPERATING ACTIVITIES
Net cash provided by operating activities from continuing operations	0	0
INVESTING ACTIVITIES
Property, plant and equipment	0	0
Investments	0	0
Net cash used in investing activities from continuing operations	0	0
FINANCING ACTIVITIES
Borrowings	0	0
Repayment of borrowings	0	0
Repurchase of shares		0
Dividends paid and distributions	0	0
Other financing activities, net	0	0
Net cash used in financing activities from continuing operations	0	0
Discontinued operations
Net decrease in cash and cash equivalents from discontinued operations	0	0
Net (decrease) increase in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of year	0	0
Exchange movement on cash balances	0	0
Cash and cash equivalents, end of period	$ 0	$ 0