Commitments And Contingencies (Minimum Contractual Obligations) (Details) $ in Millions	Mar. 31, 2019 USD ($)
Long Term Purchase Commitments
TotalUnconditionalPurchaseObligationBalanceSheetAmount	$ 3,052
Total Unconditional Purchase Obligation Balance Sheet Amount One Year After Fiscal Year End	488
TotalUnconditionalPurchaseObligationBalanceSheetAmountThreeYearsAfterFiscalYearEnd	1,163
TotalUnconditionalPurchaseObligationBalanceSheetAmountFourYearsAfterFiscalYearEnd	458
Total Unconditional Purchase Obligation Balance Sheet Amount Five Years After Fiscal Year End	191
TotalUnconditionalPurchaseObligationBalanceSheetAmountThereafter	164
TotalUnconditionalPurchaseObligationBalanceSheetAmountThereafter	588
Developer And Licensor - Royalty and Non-Royalty Bearing [Member]
Long Term Purchase Commitments
Unrecorded Unconditional Purchase Obligation	973
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	214
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	292
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	240
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	93
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	75
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	59
Marketing
Long Term Purchase Commitments
Unrecorded Unconditional Purchase Obligation	377
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	94
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	97
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	85
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	37
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	37
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	27
Operating leases
Long Term Purchase Commitments
Unrecorded Unconditional Purchase Obligation	264
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	52
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	54
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	44
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	36
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	28
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	50
Senior Notes Interest
Long Term Purchase Commitments
Unrecorded Unconditional Purchase Obligation	175
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	38
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	41
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	19
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	19
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	19
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	39
Other Unrecorded Purchase Obligations [Member]
Long Term Purchase Commitments
Unrecorded Unconditional Purchase Obligation	92
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	40
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	30
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	19
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	3
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	0
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	0
Total Unrecognized Commitments
Long Term Purchase Commitments
Unrecorded Unconditional Purchase Obligation	1,881
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	438
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	514
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	407
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	188
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	159
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	175
Transition tax [Member]
Long Term Purchase Commitments
Recorded Unconditional Purchase Obligation	90
Recorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	22
Recorded Unconditional Purchase Obligation, Due in Rolling Year Two	23
Recorded Unconditional Purchase Obligation, Due in Rolling Year Three	24
Recorded Unconditional Purchase Obligation, Due in Rolling Year Four	3
Recorded Unconditional Purchase Obligation, Due in Rolling Year Five	5
Recorded Unconditional Purchase Obligation, Due in Rolling after Year Five	13
License obligations [Member]
Long Term Purchase Commitments
Recorded Unconditional Purchase Obligation	78
Recorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	25
Recorded Unconditional Purchase Obligation, Due in Rolling Year Two	26
Recorded Unconditional Purchase Obligation, Due in Rolling Year Three	27
Recorded Unconditional Purchase Obligation, Due in Rolling Year Four	0
Recorded Unconditional Purchase Obligation, Due in Rolling Year Five	0
Recorded Unconditional Purchase Obligation, Due in Rolling after Year Five	0
Senior Notes and Interest
Long Term Purchase Commitments
Recorded Unconditional Purchase Obligation	1,003
Senior Notes Interest
Long Term Purchase Commitments
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	3
Senior Notes
Long Term Purchase Commitments
Recorded Unconditional Purchase Obligation, Due in Rolling Year Three	600
Recorded Unconditional Purchase Obligation, Due in Rolling after Year Five	400
Total Recorded Unconditional Purchase Obligation [Domain]
Long Term Purchase Commitments
Recorded Unconditional Purchase Obligation	1,171
Recorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	50
Recorded Unconditional Purchase Obligation, Due in Rolling Year Two	649
Recorded Unconditional Purchase Obligation, Due in Rolling Year Three	51
Recorded Unconditional Purchase Obligation, Due in Rolling Year Four	3
Recorded Unconditional Purchase Obligation, Due in Rolling Year Five	5
Recorded Unconditional Purchase Obligation, Due in Rolling after Year Five	$ 413