Business Combinations (Details)	3 Months Ended		9 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Business Acquisition, Date of Acquisition Agreement	Dec. 01, 2017
Total Purchase Price	$ 273,000,000
Payments to Acquire Businesses, Gross	151,000,000
Business Combination, Contingent Consideration, Liability	122,000,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount	167,000,000
Intangible Assets Acquired	78,000,000
Net Tangible Assets Acquired	28,000,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	140,000,000
Number of Businesses Acquired		0	0
Restricted Stock Units (RSUs) [Member]
Business Acquisition [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	459,000,000
Restricted Stock Units (RSUs) [Member] | Respawn Entertainment, LLC [Member]
Business Acquisition [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 167,000,000