|**Commitments And Contingencies (Tables)**              | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
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|**Commitments and Contingencies Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Minimum Contractual Obligations                         | The following table summarizes our minimum contractual obligations as ofJune 30, 2018(in millions):Fiscal Years Ending March 31,2019(RemainingTotalnine mos.)20202021202220232024ThereafterUnrecognized commitmentsDeveloper/licensor commitments$897$169$233$213$201$80$1$—Marketing commitments3265588837426——Operating leases22529393932251942Senior Notes interest20627414120201938Other purchase obligations10429341495310Total unrecognized commitments1,7583094353903361564290Recognized commitmentsSenior Notes principal and interest1,01414—600———400Transition Tax391—144722Licensing and lease obligations9618252627———Total recognized commitments1,14933256273147422Total commitments$2,907$342$460$1,017$367$160$49$512
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|Unrecognized commitments                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Developer/licensor commitments                          | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|Marketing commitments                                   | 326                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Operating leases                                        | 225                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Senior Notes interest                                   | 206                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Other purchase obligations                              | 104                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Total unrecognized commitments                          | 1,758                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
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|Recognized commitments                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Senior Notes principal and interest                     | 1,014                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|Transition Tax                                          | 39                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|Licensing and lease obligations                         | 96                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|Total recognized commitments                            | 1,149                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
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|Total commitments                                       | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     

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