Commitments And Contingencies (Minimum Contractual Obligations) (Details) $ in Millions	Sep. 30, 2021 USD ($)
Long-term Purchase Commitment [Line Items]
Unrecorded Total	$ 3,879
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	233
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	676
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	767
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	628
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	493
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	148
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	934
Recorded Total	2,270
Recorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	66
Recorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	62
Recorded Unconditional Purchase Obligation, Due in Rolling Year Two	57
Recorded Unconditional Purchase Obligation, Due in Rolling Year Three	49
Recorded Unconditional Purchase Obligation, Due in Rolling Year Four	445
Recorded Unconditional Purchase Obligation, Due in Rolling Year Five	26
Recorded Unconditional Purchase Obligation, Due in Rolling after Year Five	1,565
TotalUnconditionalPurchaseObligationBalanceSheetAmount	6,149
TotalUnconditionalPurchaseObligationBalanceSheetAmountRemainingForCurrentFiscalYear	299
Total Unconditional PurchaseObligationBalanceSheetAmountOneYearAfterFiscalYearEnd	738
Total Unconditional Purchase Obligation Balance Sheet Amount Two Years After Fiscal Year End	824
TotalUnconditionalPurchaseObligationBalanceSheetAmountThreeYearsAfterFiscalYearEnd	677
TotalUnconditionalPurchaseObligationBalanceSheetAmountFourYearsAfterFiscalYearEnd	938
Total Unconditional Purchase Obligation Balance Sheet Amount Five Years After Fiscal Year End	174
TotalUnconditionalPurchaseObligationBalanceSheetAmountThereafter	$ 2,499
Minimum
Long-term Purchase Commitment [Line Items]
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract	3 years
Maximum
Long-term Purchase Commitment [Line Items]
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract	12 years
Developer Commitments
Long-term Purchase Commitment [Line Items]
Unrecorded Total	$ 1,961
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	109
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	392
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	427
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	421
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	330
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	79
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	203
Marketing [Member]
Long-term Purchase Commitment [Line Items]
Unrecorded Total	649
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	84
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	150
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	144
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	130
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	92
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	19
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	30
Senior Notes Interest [Member]
Long-term Purchase Commitment [Line Items]
Unrecorded Total	863
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	21
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	55
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	55
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	55
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	54
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	36
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	587
Operating Lease Imputed Interest [Member] [Member]
Long-term Purchase Commitment [Line Items]
Unrecorded Total	31
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	4
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	6
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	5
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	4
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	3
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	2
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	7
Other Unrecorded Purchase Obligations [Member]
Long-term Purchase Commitment [Line Items]
Unrecorded Total	215
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	12
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	66
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	128
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	7
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	2
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	0
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	0
Senior Notes Principal And Interest [Member]
Long-term Purchase Commitment [Line Items]
Recorded Total	1,906
Recorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	6
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	400
Recorded Unconditional Purchase Obligation, Due in Rolling Year Five	0
Recorded Unconditional Purchase Obligation, Due in Rolling after Year Five	1,500
Operating Lease [Member]
Long-term Purchase Commitment [Line Items]
Unrecorded Total	160
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	3
Unrecorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	7
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Two	8
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Three	11
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Four	12
Unrecorded Unconditional Purchase Obligation, Due in Rolling Year Five	12
Unrecorded Unconditional Purchase Obligation, Due in Rolling after Year Five	107
Recorded Total	318
Recorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	34
Recorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	59
Recorded Unconditional Purchase Obligation, Due in Rolling Year Two	53
Recorded Unconditional Purchase Obligation, Due in Rolling Year Three	43
Recorded Unconditional Purchase Obligation, Due in Rolling Year Four	38
Recorded Unconditional Purchase Obligation, Due in Rolling Year Five	26
Recorded Unconditional Purchase Obligation, Due in Rolling after Year Five	65
Transition And Other Taxes [Member]
Long-term Purchase Commitment [Line Items]
Recorded Total	31
Recorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	11
Recorded Unconditional Purchase Obligation, Due in Next Rolling Twelve Months	3
Recorded Unconditional Purchase Obligation, Due in Rolling Year Two	4
Recorded Unconditional Purchase Obligation, Due in Rolling Year Three	6
Recorded Unconditional Purchase Obligation, Due in Rolling Year Four	7
Recorded Unconditional Purchase Obligation, Due in Rolling Year Five	0
Recorded Unconditional Purchase Obligation, Due in Rolling after Year Five	0
License obligations [Member]
Long-term Purchase Commitment [Line Items]
Recorded Total	15
Recorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	15
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	0
Recorded Unconditional Purchase Obligation, Due in Rolling Year Five	0
Recorded Unconditional Purchase Obligation, Due in Rolling after Year Five	$ 0