Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
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 | ||