Pension and Other Benefit Programs - Defined Benefit Plan Assets Measured at Fair Value (Detail) - USD ($) $ in Millions		Oct. 02, 2021	Oct. 03, 2020
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		$ 18,965	$ 16,369
Percentage of plan assets mix		100.00%	100.00%
Cash
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Percentage of plan assets mix		0.00%	1.00%
Equity Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Percentage of plan assets mix	[1]	23.00%	20.00%
Mutual Funds
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Percentage of plan assets mix		7.00%	7.00%
US Government Debt Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Percentage of plan assets mix		15.00%	16.00%
Corporate Bond Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Percentage of plan assets mix		6.00%	6.00%
Other Mortgage and Asset Backed Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Percentage of plan assets mix		1.00%	1.00%
Derivatives and Other, Net
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Percentage of plan assets mix		0.00%	0.00%
Common Collective Funds
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		$ 4,550	$ 3,993
Percentage of plan assets mix		24.00%	24.00%
Alternative Investments Funds
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		$ 4,342	$ 3,375
Percentage of plan assets mix		23.00%	21.00%
Money Market Funds and Other
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		$ 254	$ 606
Percentage of plan assets mix		1.00%	4.00%
Level 1 | Cash
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		$ 77	$ 207
Level 1 | Equity Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy	[1]	4,407	3,308
Level 1 | Mutual Funds
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		1,326	1,154
Level 1 | US Government Debt Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		2,437	2,326
Level 1 | Corporate Bond Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		0	0
Level 1 | Other Mortgage and Asset Backed Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		0	0
Level 1 | Derivatives and Other, Net
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		8	(2)
Level 1 | Total Investments at Fair Value
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		8,255	6,993
Level 2 | Cash
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		0	0
Level 2 | Equity Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy	[1]	0	0
Level 2 | Mutual Funds
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		0	0
Level 2 | US Government Debt Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		349	354
Level 2 | Corporate Bond Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		1,098	935
Level 2 | Other Mortgage and Asset Backed Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		96	106
Level 2 | Derivatives and Other, Net
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		21	7
Level 2 | Total Investments at Fair Value
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		1,564	1,402
Level 1 and 2 | Cash
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		77	207
Level 1 and 2 | Equity Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy	[1]	4,407	3,308
Level 1 and 2 | Mutual Funds
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		1,326	1,154
Level 1 and 2 | US Government Debt Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		2,786	2,680
Level 1 and 2 | Corporate Bond Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		1,098	935
Level 1 and 2 | Other Mortgage and Asset Backed Securities
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		96	106
Level 1 and 2 | Derivatives and Other, Net
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		29	5
Level 1 and 2 | Total Investments at Fair Value
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets in the Fair Value Hierarchy		$ 9,819	$ 8,395

[1] Includes 2.9 million shares of Company common stock valued at $489 million (3% of total plan assets) and 2.9 million shares valued at $355 million (2% of total plan assets) at October 2, 2021 and October 3, 2020, respectively.