Commitments And Contingencies (Minimum Contractual Obligations) (Details) $ in Millions	Sep. 30, 2017 USD ($)
Long Term Purchase Commitments
TotalUnconditionalPurchaseObligationBalanceSheetAmount	$ 3,165
TotalUnconditionalPurchaseObligationBalanceSheetAmountRemainingForCurrentFiscalYear	168
Total Unconditional PurchaseObligationBalanceSheetAmountOneYearAfterFiscalYearEnd	545
Total Unconditional Purchase Obligation Balance Sheet Amount Two Years After Fiscal Year End	471
TotalUnconditionalPurchaseObligationBalanceSheetAmountThreeYearsAfterFiscalYearEnd	997
TotalUnconditionalPurchaseObligationBalanceSheetAmountFourYearsAfterFiscalYearEnd	350
Total Unconditional Purchase Obligation Balance Sheet Amount Five Years After Fiscal Year End	115
TotalUnconditionalPurchaseObligationBalanceSheetAmountThereafter	519
Developer/Licensor Commitments - Royalty and Non-Royalty Bearing
Long Term Purchase Commitments
Unrecorded Total	1,061
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	78
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	296
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	243
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	206
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	194
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	43
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	1
Marketing
Long Term Purchase Commitments
Unrecorded Total	422
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	26
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	115
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	103
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	77
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	74
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	27
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	0
Operating leases
Long Term Purchase Commitments
Unrecorded Total	231
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	37
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	37
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	30
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	22
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	46
Senior Notes Interest
Long Term Purchase Commitments
Unrecorded Total	237
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	17
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	41
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	58
Other unrecorded purchase obligations
Long Term Purchase Commitments
Unrecorded Total	97
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	14
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	28
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	22
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	10
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	5
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	4
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	14
Total Unrecorded Unconditional Purchase Obligation [Domain]
Long Term Purchase Commitments
Unrecorded Total	2,048
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	153
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	521
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	446
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	371
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	323
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	115
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	119
Total Recorded Unconditional Purchase Obligation [Domain]
Long Term Purchase Commitments
Recorded Total	1,117
Recorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	15
Recorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	24
Recorded Unconditional Purchase Obligation, Due in Rolling Year Two	25
Recorded Unconditional Purchase Obligation, Due in Rolling Year Three	626
Recorded Unconditional Purchase Obligation, Due in Rolling Year Four	27
Recorded Unconditional Purchase Obligation, Due in Rolling Year Five	0
Recorded Unconditional Purchase Obligation, Due in Rolling after Year Five	400
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 Four	600
Recorded Unconditional Purchase Obligation, Due in Rolling after Year Five	400
Licensing and lease obligations
Long Term Purchase Commitments
Recorded Total	114
Recorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	12
Recorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	24
Recorded Unconditional Purchase Obligation, Due in Rolling Year Two	25
Recorded Unconditional Purchase Obligation, Due in Rolling Year Three	26
Recorded Unconditional Purchase Obligation, Due in Rolling Year Four	27
Recorded Unconditional Purchase Obligation, Due in Rolling Year Five	0
Recorded Unconditional Purchase Obligation, Due in Rolling after Year Five	$ 0