Acquisitions, Disposals and Other Transactions - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended				6 Months Ended	1 Months Ended
	Aug. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Nov. 30, 2014	Dec. 31, 2014	Sep. 30, 2013 Product
Harlequin Enterprises Limited [Member]
Schedule Of Business Acquisitions And Divestitures [Line Items]
Business acquisition, cost of acquired entity	$ 414
Business acquisition purchase price allocation, cash	19
Business acquisition purchase price allocation, net tangible assets	130
Business acquisition purchase price allocation, net intangible assets	150
Business acquisition purchase price allocation, non-amortizable intangible assets	105
Business acquisition purchase price allocation, finite lived intangible assets	45
Finite lived intangible assets, weighted average useful life	5 years
Business acquisition purchase price allocation, deferred tax liability	30
Business acquisition purchase price allocation, goodwill amount	180
Storyful Limited [Member]
Schedule Of Business Acquisitions And Divestitures [Line Items]
Business acquisition, cost of acquired entity		25
Business acquisition, cost of acquired entity, cash paid		19
Move Inc [Member]
Schedule Of Business Acquisitions And Divestitures [Line Items]
Business acquisition, cost of acquired entity				892
Business acquisition purchase price allocation, cash				108
Business acquisition purchase price allocation, net intangible assets				260
Business acquisition purchase price allocation, deferred tax liability				41
Shares purchase price				$ 21.00
Business acquisition, cost of acquired entity, cash paid				864
Fair value of assumed outstanding equity awards				67
Business acquisition pre-combination services				28
Consideration transferred for future services				39
Business combination , weighted average remaining service period				2 years 6 months
Business acquisition, cost of acquired entity net of cash acquired				784
Business acquisition, cash paid for outstanding indebtedness			129
Net operating loss carryforwards				940
Move Inc [Member] | Trademarks and Other Trademarks and Domain Names [Member]
Schedule Of Business Acquisitions And Divestitures [Line Items]
Business acquisition purchase price allocation, non-amortizable intangible assets			160		160
Move Inc [Member] | Customer Relationships [Member]
Schedule Of Business Acquisitions And Divestitures [Line Items]
Business acquisition purchase price allocation, finite lived intangible assets			$ 100		$ 100
Useful life of amortizable intangible assets					5 years
REA Group Limited [Member]
Schedule Of Business Acquisitions And Divestitures [Line Items]
Interest acquired			20.00%		20.00%
LMG [Member]
Schedule Of Business Acquisitions And Divestitures [Line Items]
States of operation						7
LMG [Member] | Daily Newspapers [Member]
Schedule Of Business Acquisitions And Divestitures [Line Items]
Number of products						8
LMG [Member] | Weekly Newspapers [Member]
Schedule Of Business Acquisitions And Divestitures [Line Items]
Number of products						15