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Debt Obligations and Commitments (Schedule of Long and Short-Term Debt Contractual Commitments) (Details) € in Millions, $ in Millions	Dec. 28, 2019 USD ($)	Dec. 28, 2019 EUR (€)	Dec. 29, 2018 USD ($)
Debt Instrument [Line Items]
Debt, Current	$ 2,920		$ 4,026
Notes due	2,200		7,700
Long-term Debt	31,996		32,248
Long-Term Debt Obligations	29,148		28,295
Debt Instrument, Unamortized Discount	$ 163		$ 119
Other Borrowings Short-term [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	6.40%	6.40%	6.00%
Other borrowings	$ 72		$ 73
Notes Due 2027 [Member] \| Zero Point Seven Five Percent Notes Due 2027
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.75%	0.75%
Debt Instrument, Face Amount \| €		€ 500
Notes Due 2026 [Member] \| Seven Point Two Nine Zero Percent Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount			$ 11
Debt Instrument, Interest Rate, Stated Percentage			7.29%
Debt Instrument, Face Amount			$ 88
Notes Due 2026 [Member] \| Seven Point Four Four Zero Percent Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount			$ 4
Debt Instrument, Interest Rate, Stated Percentage			7.44%
Debt Instrument, Face Amount			$ 21
Current Maturities Of Long Term Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	$ 2,848		3,953
Long-term Debt, Current Maturities	$ (2,848)		$ (3,953)
Notes Due 2031 [Member] \| One Point One Two Five Percent Notes Due 2031
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.125%	1.125%
Debt Instrument, Face Amount \| €		€ 500
Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	0.00%	0.00%	3.10%
Notes due	$ 0		$ 3,948
Notes Due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	2.70%	2.70%	3.90%
Notes due	$ 2,840		$ 3,784
Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	2.40%	2.40%	3.10%
Notes due	$ 3,276		$ 3,257
Notes Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	2.70%	2.70%	2.80%
Notes due	$ 3,831		$ 3,802
Notes Due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	2.80%	2.80%	2.90%
Notes due	$ 1,272		$ 1,270
Notes Due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	3.40%	3.40%	3.20%
Notes due	$ 1,839		$ 1,816
Notes Due 2025 to 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	3.30%	3.30%	3.70%
Notes due	$ 18,910		$ 14,345
Other Debt Instruments due 2019 to 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.30%	1.30%	1.30%
Other notes due	$ 28		$ 26
Less: Current Maturities Of Long Term Debt Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	2,848		3,953
Long-term Debt, Current Maturities	$ (2,848)		(3,953)
Notes Due 2029 [Member] \| Seven Point Zero Percent Notes Due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount			$ 357
Debt Instrument, Interest Rate, Stated Percentage			7.00%
Debt Instrument, Face Amount			$ 516
Notes Due 2029 [Member] \| Two Point Six Two Five Percent Notes Due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.625%	2.625%
Debt Instrument, Face Amount	$ 1,000
Notes Due 2035 [Member] \| Five Point Five Zero Percent Notes Due 2035 [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount			$ 138
Debt Instrument, Interest Rate, Stated Percentage			5.50%
Debt Instrument, Face Amount			$ 107
Notes Due 2040 [Member] \| Four Point Eight Seven Five Percent Notes Due 2040 [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount			$ 410
Debt Instrument, Interest Rate, Stated Percentage			4.875%
Notes Due 2040 [Member] \| Five Point Five Zero Percent Notes Due 2040 [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount			$ 408
Debt Instrument, Interest Rate, Stated Percentage			5.50%
Notes Due 2049 [Member] \| Three Point Three Seven Five Percent Notes Due 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.375%	3.375%
Debt Instrument, Face Amount	$ 1,000
Notes Due 2049 [Member] \| Two Point Eight Seven Five Percent Notes Due 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.875%	2.875%
Debt Instrument, Face Amount	$ 1,000
Notes due 2039 [Member] \| Zero Point Eight Seven Five Percent Notes Due 2039 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.875%	0.875%
Debt Instrument, Face Amount \| €		€ 500