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Financing (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Apr. 02, 2021 | Apr. 02, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |
Debt discounts, premiums and debt issuance costs | $ 127 | $ 127 | $ 132
Common stock, par value | $ 0.01 | $ 0.01 | $ 0.01
Euro-denominated commercial paper | Commercial paper |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rate of long-term debt, interest rate | 0.40% | 0.40% |
Weighted average maturity of long-term debt, at point in time | 24 days |  |
Zero-coupon LYONs due 2021 | Convertible debt |  |  |
Debt Instrument [Line Items] |  |  |
Shares issued under debt conversion, shares |  | 912 |
Debt conversion, converted instrument, deferred tax liability |  | $ 10 |
Long-term debt | Revolving credit facility | Five-Year Facility |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit | $ 5,000 | $ 5,000 |

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