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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Debt - Narrative (Details)		3 Months Ended
Debt - Narrative (Details)	Jan. 27, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jan. 28, 2015 USD ($)
Debt Instrument [Line Items]
Principal Amount		$ 16,000,000,000
Net aggregate proceeds		$ 15,877,000,000	$ 0
Senior Notes
Debt Instrument [Line Items]
Interest rate on senior notes, minimum		1.20%
Interest rate on senior notes, maximum		4.30%
Interest expense		$ 24,000,000
Senior Notes \| Subsequent to defined date on 2017 \| 2017 Notes, 2020 Notes, 2022 Notes, 2025 Notes
Debt Instrument [Line Items]
Redemption price, as percentage of principal amount (percent)		101.00%
Senior Notes \| Minimum
Debt Instrument [Line Items]
Debt maturity period		2 years
Senior Notes \| Maximum
Debt Instrument [Line Items]
Debt maturity period		30 years
Revolving Credit Facility \| Credit Facility Expiring January 27, 2016 [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 3,000,000,000.0
Revolving Credit Facility \| Subsequent Event \| Credit Facility Expiring January 27, 2021 [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 4,000,000,000.0
Debt maturity period	5 years
Consolidated Indebtedness to Consolidated EBITDA Ratio (not greater than)	3.75
If Redeemed Prior to Maturity Date or Par Call Date, as Applicable \| Senior Notes
Debt Instrument [Line Items]
Redemption price, as percentage of principal amount (percent)		100.00%
If Redeemed on or after Par Call Date, except for 2017 Notes \| Senior Notes
Debt Instrument [Line Items]
Redemption price, as percentage of principal amount (percent)		100.00%