(Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (Details) $ in Millions		Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)
Other liabilities | Fair Value, Inputs, Level 3 [Member] | Contingent consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Accrued Liabilities, Fair Value Disclosure	[1]	$ 122	$ 122
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Business Combination, Contingent Consideration, Liability, Measurement Input		0.032	0.033
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Business Combination, Contingent Consideration, Liability, Measurement Input		0.038	0.036

[1] The contingent consideration represents the estimated fair value of the additional variable cash consideration payable in connection with our acquisition of Respawn Entertainment, LLC (“Respawn”) that is contingent upon the achievement of certain performance milestones. We estimated fair value using a probability-weighted income approach combined with a real options methodology, and applied a discount rate that appropriately captures the risk associated with the obligation. At June 30, 2018, the discount rates used ranged from 3.2 percent to 3.8 percent. There were no material changes in the fair value of the contingent consideration during the three months ended June 30, 2018. At March 31, 2018, the discount rates used ranged from 3.3 percent to 3.6 percent. See Note 6 in our Annual Report on Form 10-K for the fiscal year ended March 31, 2018, for additional information regarding the Respawn acquisition.