Commitments And Contingencies (Minimum Contractual Obligations) (Details) $ in Millions	Sep. 30, 2018 USD ($)
Long Term Purchase Commitments
TotalUnconditionalPurchaseObligationBalanceSheetAmount	$ 2,716
TotalUnconditionalPurchaseObligationBalanceSheetAmountRemainingForCurrentFiscalYear	159
Total Unconditional PurchaseObligationBalanceSheetAmountOneYearAfterFiscalYearEnd	457
Total Unconditional Purchase Obligation Balance Sheet Amount Two Years After Fiscal Year End	1,064
TotalUnconditionalPurchaseObligationBalanceSheetAmountThreeYearsAfterFiscalYearEnd	359
TotalUnconditionalPurchaseObligationBalanceSheetAmountFourYearsAfterFiscalYearEnd	124
Total Unconditional Purchase Obligation Balance Sheet Amount Five Years After Fiscal Year End	47
TotalUnconditionalPurchaseObligationBalanceSheetAmountThereafter	506
Developer/Licensor Commitments - Royalty and Non-Royalty Bearing
Long Term Purchase Commitments
Unrecorded Total	790
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	64
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	229
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	257
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	196
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	43
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	1
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	0
Marketing
Long Term Purchase Commitments
Unrecorded Total	303
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	28
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	89
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	85
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	75
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	26
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	0
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	0
Operating leases
Long Term Purchase Commitments
Unrecorded Total	219
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	18
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	41
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	40
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	33
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	26
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	19
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	42
Senior Notes Interest
Long Term Purchase Commitments
Unrecorded Total	196
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	18
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	41
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	20
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	19
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	38
Other unrecorded purchase obligations
Long Term Purchase Commitments
Unrecorded Total	90
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	15
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	32
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	15
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	9
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	6
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	3
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	10
Total Unrecorded Unconditional Purchase Obligation [Domain]
Long Term Purchase Commitments
Unrecorded Total	1,598
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	143
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	432
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	438
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	332
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	121
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	42
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	90
Transition tax [Member]
Long Term Purchase Commitments
Recorded Total	25
Recorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	1
Recorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	0
Recorded Unconditional Purchase Obligation, Due in Rolling Year Two	0
Recorded Unconditional Purchase Obligation, Due in Rolling Year Three	0
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	16
Total Recorded Unconditional Purchase Obligation [Domain]
Long Term Purchase Commitments
Recorded Total	1,118
Recorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	16
Recorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	25
Recorded Unconditional Purchase Obligation, Due in Rolling Year Two	626
Recorded Unconditional Purchase Obligation, Due in Rolling Year Three	27
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	416
Senior Notes and Interest
Long Term Purchase Commitments
Recorded Total	1,003
Senior Notes Interest
Long Term Purchase Commitments
Recorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	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
Licensing and lease obligations
Long Term Purchase Commitments
Recorded Total	90
Recorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	12
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