Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended				1 Months Ended	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2014		Dec. 31, 2013		Jan. 31, 2014	Dec. 31, 2013
Income Tax Contingency [Line Items]
Tax expenses to others, net	$ 0	[1]	$ 238	[1]	$ 0	[1]	$ 721	[1]
Income tax refunds					3		682
Income taxes paid					50		48
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Refund of taxes plus interest in foreign jurisdiction			239				794
Tax benefit, net			238				721
Income tax refunds							654		140
21st Century Fox [Member]
Income Tax Contingency [Line Items]
Tax benefit, net			238				721
Tax expenses to others, net			238				721
Income tax refunds remitted to a related party									148	573
21st Century Fox [Member] | Foreign Tax Authority [Member] | Tax Indemnification [Member]
Income Tax Contingency [Line Items]
Tax expenses to others, net			$ 238				$ 721

[1] See Note 12-Income Taxes