Pension Benefits Plan Assets (Details) - Global plans - Pension - USD ($) $ in Millions		12 Months Ended
		Jan. 02, 2021		Dec. 28, 2019		Dec. 29, 2018
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 5,211		$ 5,170		$ 4,677
Net Asset Value Excluded From Fair Value By Input		2,791	[1]	2,615	[2]
Expected contribution by Company		6
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		360		368
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1,780		2,187
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		280		0
Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		42		14
Net Asset Value Excluded From Fair Value By Input		3	[1]	0	[2]
Cash and Cash Equivalents | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		35		14
Cash and Cash Equivalents | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		4		0
Cash and Cash Equivalents | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Corporate stock, common
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		325		354
Net Asset Value Excluded From Fair Value By Input		0	[1]	0	[2]
Corporate stock, common | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		325		354
Corporate stock, common | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Corporate stock, common | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 0		$ 0
Domestic Corporate Common Stock
Defined Benefit Plan Disclosure [Line Items]
Percentage of consolidated plan assets represented by investment in Company comon stock		1.10%		1.20%
Mutual Fund International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 2		$ 36
Net Asset Value Excluded From Fair Value By Input		2	[1]	36	[2]
Mutual Fund International Equity | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Mutual Fund International Equity | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Mutual Fund International Equity | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Mutual Funds Domestic Debt
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		5		4
Net Asset Value Excluded From Fair Value By Input		0	[1]	0	[2]
Mutual Funds Domestic Debt | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Mutual Funds Domestic Debt | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		5		4
Mutual Funds Domestic Debt | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Collective Trusts Domestic Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1,508		1,431
Net Asset Value Excluded From Fair Value By Input		1,508	[1]	1,314	[2]
Collective Trusts Domestic Equity | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Collective Trusts Domestic Equity | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		117
Collective Trusts Domestic Equity | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Collective Trusts Other International Debt
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		963		1,096
Net Asset Value Excluded From Fair Value By Input		415	[1]	378	[2]
Collective Trusts Other International Debt | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Collective Trusts Other International Debt | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		548		718
Collective Trusts Other International Debt | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Limited Partnership
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		292		228
Net Asset Value Excluded From Fair Value By Input		292	[1]	228	[2]
Limited Partnership | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Limited Partnership | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Limited Partnership | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Bonds, corporate
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		361		654
Net Asset Value Excluded From Fair Value By Input		141	[1]	211	[2]
Bonds, corporate | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Bonds, corporate | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		220		443
Bonds, corporate | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Bonds, government
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		861		774
Net Asset Value Excluded From Fair Value By Input		0	[1]	0	[2]
Bonds, government | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Bonds, government | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		861		774
Bonds, government | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Bonds, other
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		64		70
Net Asset Value Excluded From Fair Value By Input		0	[1]	0	[2]
Bonds, other | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Bonds, other | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		64		70
Bonds, other | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Real estate
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		421		412
Net Asset Value Excluded From Fair Value By Input		421	[1]	412	[2]
Real estate | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Real estate | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Real estate | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		87		97
Net Asset Value Excluded From Fair Value By Input		9	[1]	36	[2]
Other [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0		0
Other [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		78		61
Other [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 0		0
Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Weighted-average target asset allocation		29.00%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Weighted-average target asset allocation		34.00%
Real Estate And Other
Defined Benefit Plan Disclosure [Line Items]
Weighted-average target asset allocation		37.00%
Buy-in annuity contract
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 280
Net Asset Value Excluded From Fair Value By Input	[1]	0
Buy-in annuity contract | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Buy-in annuity contract | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0
Buy-in annuity contract | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 280		$ 0

[1] Certain assets that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy.

[2] Certain assets that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy.