Pension and Other Benefit Programs - Defined Benefit Plan Assets Measured at Fair Value (Detail) (USD $) In Millions, unless otherwise specified	Sep. 28, 2013		Sep. 29, 2012
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	$ 9,473		$ 8,437
Percentage of plan assets mix	100.00%		100.00%
Level 1
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	4,397		3,940
Level 2
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	3,621		3,173
Level 3
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	1,455		1,324
Equity Investments | U S Small Cap
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	220		93
Percentage of plan assets mix	2.00%		1.00%
Equity Investments | U S Small Cap | Level 1
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	220		93
Equity Investments | US Mid/Large cap
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	1,864	[1]	1,746	[1]
Percentage of plan assets mix	19.00%		21.00%
Equity Investments | US Mid/Large cap | Level 1
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	1,864	[1]	1,746	[1]
Equity Investments | International
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	1,979		1,546
Percentage of plan assets mix	21.00%		18.00%
Equity Investments | International | Level 1
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	1,384		1,096
Equity Investments | International | Level 2
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	595		450
Debt Securities | Corporate bonds
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	667		736
Percentage of plan assets mix	7.00%		9.00%
Debt Securities | Corporate bonds | Level 2
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	667		736
Debt Securities | Government and federal agency bonds, notes and MBS
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	1,572		1,737
Percentage of plan assets mix	17.00%		21.00%
Debt Securities | Government and federal agency bonds, notes and MBS | Level 1
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	802		827
Debt Securities | Government and federal agency bonds, notes and MBS | Level 2
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	770		910
Debt Securities | MBS & asset-backed securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	322		212
Percentage of plan assets mix	3.00%		3.00%
Debt Securities | MBS & asset-backed securities | Level 1
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements			0
Debt Securities | MBS & asset-backed securities | Level 2
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	322		212
Alternative Investments | Diversified
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	617		544
Percentage of plan assets mix	7.00%		6.00%
Alternative Investments | Diversified | Level 1
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	85		83
Alternative Investments | Diversified | Level 2
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	262		282
Alternative Investments | Diversified | Level 3
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	270		179
Alternative Investments | Distressed
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	153		194
Percentage of plan assets mix	2.00%		2.00%
Alternative Investments | Distressed | Level 3
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	153		194
Alternative Investments | Private equity/venture capital
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	673		623
Percentage of plan assets mix	7.00%		7.00%
Alternative Investments | Private equity/venture capital | Level 3
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	673		623
Alternative Investments | Real estate
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	359		328
Percentage of plan assets mix	4.00%		4.00%
Alternative Investments | Real estate | Level 3
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	359		328
Derivatives and Other, Net
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	119		11
Percentage of plan assets mix	1.00%
Derivatives and Other, Net | Level 2
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	119		11
Cash & Money Market Funds
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	928		667
Percentage of plan assets mix	10.00%		8.00%
Cash & Money Market Funds | Level 1
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	42		95
Cash & Money Market Funds | Level 2
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Fair value asset measurements	$ 886		$ 572

[1] Large cap domestic equities include 2.9 million shares of Company common stock valued at $185 million (2% of total plan assets) and 2.8 million shares valued at $147 million (2% of total plan assets) at September 28, 2013 and September 29, 2012, respectively.