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Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions | 12 Months Ended
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Jan. 03, 2025 USD ($) reporting_unit | Dec. 29, 2023 USD ($) reporting_unit | Dec. 30, 2022 USD ($)
Significant Accounting Policies [Line Items] |  |  |
Decrease in income before income taxes from changes in contract estimates | $ 153 | $ 100 | $ 113
Contract with customer, performance obligation satisfied in previous period | 13 | 8 | 9
Internal research and development costs included in selling, general and administrative expenses | 150 | 128 | 116
Accounts payable and accrued liabilities | 2,225 | 2,277 |
Less: restricted cash at end of year | $ 141 | $ 151 | $ 167
Number of reporting units (in reporting units) | reporting_unit | 8 | 7 |
Cash and Cash Equivalents |  |  |
Significant Accounting Policies [Line Items] |  |  |
Accounts payable and accrued liabilities | $ 94 | $ 136 |
UNITED KINGDOM |  |  |
Significant Accounting Policies [Line Items] |  |  |
Decrease in income before income taxes from changes in contract estimates | $ 40 |  |

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- Definition Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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- Definition Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 730 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482916/730-10-50-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 912 -SubTopic 730 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479532/912-730-25-1 + Details
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