Borrowings - Schedule of Long-term Debt Instruments (Details) € in Millions, $ in Millions, £ in Billions	Dec. 29, 2019 USD ($)	Dec. 29, 2019 GBP (£)	Dec. 29, 2019 EUR (€)	Dec. 30, 2018 USD ($)	Dec. 30, 2018 GBP (£)	Dec. 30, 2018 EUR (€)
Debt Instrument [Line Items]
Effective interest rate	3.19%	3.19%	3.19%	3.19%	3.19%	3.19%
Borrowed under the commercial paper program	$ 1,100			$ 2,600
Total long-term debt	26,494			27,684
Carrying (Reported) Amount, Fair Value Disclosure
Debt Instrument [Line Items]
Long-term Debt	27,594			30,320
Less current portion	1,100			2,636
Total long-term debt	$ 26,494			$ 27,684
4.75% Notes due 2019 (1B Euro 1.1096)(2)/(1B Euro 1.14)(3)
Debt Instrument [Line Items]
Effective interest rate	0.00%	0.00%	0.00%	5.83%	5.83%	5.83%
Long-term Debt	$ 0			$ 1,139
Stated interest rate (as a percent)				4.75%	4.75%	4.75%
Debt Instrument, Face Amount | €			€ 1,000			€ 1,000
Foreign Currency Exchange Rate, Translation	1.1096	1.1096	1.1096	1.14	1.14	1.14
1.875% Notes due 2019
Debt Instrument [Line Items]
Effective interest rate	0.00%	0.00%	0.00%	1.93%	1.93%	1.93%
Long-term Debt	$ 0			$ 494
Stated interest rate (as a percent)				1.875%	1.875%	1.875%
0.89% Notes due 2019
Debt Instrument [Line Items]
Effective interest rate	0.00%	0.00%	0.00%	1.32%	1.32%	1.32%
Long-term Debt	$ 0			$ 300
Stated interest rate (as a percent)				0.89%	0.89%	0.89%
1.125% Notes due 2019
Debt Instrument [Line Items]
Effective interest rate	0.00%	0.00%	0.00%	1.13%	1.13%	1.13%
Long-term Debt	$ 0			$ 699
Stated interest rate (as a percent)				1.125%	1.125%	1.125%
3% Zero Coupon Convertible Subordinated Debentures due 2020
Debt Instrument [Line Items]
Effective interest rate	3.00%	3.00%	3.00%	3.00%	3.00%	3.00%
Long-term Debt	$ 51			$ 51
Stated interest rate (as a percent)	3.00%	3.00%	3.00%	3.00%	3.00%	3.00%
2.95% Debentures due 2020
Debt Instrument [Line Items]
Effective interest rate	3.15%	3.15%	3.15%	3.15%	3.15%	3.15%
Long-term Debt	$ 549			$ 548
Stated interest rate (as a percent)	2.95%	2.95%	2.95%	2.95%	2.95%	2.95%
1.950% Notes due 2020
Debt Instrument [Line Items]
Effective interest rate	1.99%	1.99%	1.99%	1.99%	1.99%	1.99%
Long-term Debt	$ 500			$ 499
Stated interest rate (as a percent)	1.95%	1.95%	1.95%	1.95%	1.95%	1.95%
3.55% Notes due 2021
Debt Instrument [Line Items]
Effective interest rate	3.67%	3.67%	3.67%	3.67%	3.67%	3.67%
Long-term Debt	$ 449			$ 449
Stated interest rate (as a percent)	3.55%	3.55%	3.55%	3.55%	3.55%	3.55%
2.45% Notes due 2021
Debt Instrument [Line Items]
Effective interest rate	2.48%	2.48%	2.48%	2.48%	2.48%	2.48%
Long-term Debt	$ 349			$ 349
Stated interest rate (as a percent)	2.45%	2.45%	2.45%	2.45%	2.45%	2.45%
1.65% Notes due 2021
Debt Instrument [Line Items]
Effective interest rate	1.65%	1.65%	1.65%	1.65%	1.65%	1.65%
Long-term Debt	$ 999			$ 998
Stated interest rate (as a percent)	1.65%	1.65%	1.65%	1.65%	1.65%	1.65%
0.250% Notes due 2022 (1B Euro 1.1096)(2)/(1B Euro 1.14)(3)
Debt Instrument [Line Items]
Effective interest rate	0.26%	0.26%	0.26%	0.26%	0.26%	0.26%
Long-term Debt	$ 1,108			$ 1,137
Stated interest rate (as a percent)	0.25%	0.25%	0.25%	0.25%	0.25%	0.25%
Debt Instrument, Face Amount | €			€ 1,000			€ 1,000
Foreign Currency Exchange Rate, Translation	1.1096	1.1096	1.1096	1.14	1.14	1.14
2.25% Notes due 2022
Debt Instrument [Line Items]
Effective interest rate	2.31%	2.31%	2.31%	2.31%	2.31%	2.31%
Long-term Debt	$ 998			$ 996
Stated interest rate (as a percent)	2.25%	2.25%	2.25%	2.25%	2.25%	2.25%
6.73% Debentures due 2023
Debt Instrument [Line Items]
Effective interest rate	6.73%	6.73%	6.73%	6.73%	6.73%	6.73%
Long-term Debt	$ 250			$ 250
Stated interest rate (as a percent)	6.73%	6.73%	6.73%	6.73%	6.73%	6.73%
3.375% Notes due 2023
Debt Instrument [Line Items]
Effective interest rate	3.17%	3.17%	3.17%	3.17%	3.17%	3.17%
Long-term Debt	$ 804			$ 805
Stated interest rate (as a percent)	3.375%	3.375%	3.375%	3.375%	3.375%	3.375%
2.05% Notes due 2023
Debt Instrument [Line Items]
Effective interest rate	2.09%	2.09%	2.09%	2.09%	2.09%	2.09%
Long-term Debt	$ 498			$ 498
Stated interest rate (as a percent)	2.05%	2.05%	2.05%	2.05%	2.05%	2.05%
0.650% Notes due 2024 (750MM Euro 1.1096)(2)/(750MM Euro 1.14)(3)
Debt Instrument [Line Items]
Effective interest rate	0.68%	0.68%	0.68%	0.68%	0.68%	0.68%
Long-term Debt	$ 829			$ 851
Stated interest rate (as a percent)	0.65%	0.65%	0.65%	0.65%	0.65%	0.65%
Debt Instrument, Face Amount | €			€ 750			€ 750
Foreign Currency Exchange Rate, Translation	1.1096	1.1096	1.1096	1.14	1.14	1.14
5.50% Notes due 2024 (500MM GBP 1.2987)(2)/(500MM GBP 1.2636)(3)
Debt Instrument [Line Items]
Effective interest rate	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Long-term Debt	$ 645			$ 627
Stated interest rate (as a percent)	5.50%	5.50%	5.50%	5.50%	5.50%	5.50%
Debt Instrument, Face Amount | £		£ 0.5			£ 0.5
Foreign Currency Exchange Rate, Translation	1.2987	1.2987	1.2987	1.2636	1.2636	1.2636
2.625% Notes due 2025
Debt Instrument [Line Items]
Effective interest rate	2.63%	2.63%	2.63%	2.63%	2.63%	2.63%
Long-term Debt	$ 748			$ 748
Stated interest rate (as a percent)	2.625%	2.625%	2.625%	2.625%	2.625%	2.625%
2.45% Notes due 2026
Debt Instrument [Line Items]
Effective interest rate	2.47%	2.47%	2.47%	2.47%	2.47%	2.47%
Long-term Debt	$ 1,993			$ 1,992
Stated interest rate (as a percent)	2.45%	2.45%	2.45%	2.45%	2.45%	2.45%
2.95% Notes due 2027
Debt Instrument [Line Items]
Effective interest rate	2.96%	2.96%	2.96%	2.96%	2.96%	2.96%
Long-term Debt	$ 996			$ 996
Stated interest rate (as a percent)	2.95%	2.95%	2.95%	2.95%	2.95%	2.95%
1.150% Notes due 2028 (750MM Euro 1.1096)(2)/(750MM Euro 1.14)(3)
Debt Instrument [Line Items]
Effective interest rate	1.21%	1.21%	1.21%	1.21%	1.21%	1.21%
Long-term Debt	$ 825			$ 847
Stated interest rate (as a percent)	1.15%	1.15%	1.15%	1.15%	1.15%	1.15%
Debt Instrument, Face Amount | €			€ 750			€ 750
Foreign Currency Exchange Rate, Translation	1.1096	1.1096	1.1096	1.14	1.14	1.14
2.900% Notes due 2028
Debt Instrument [Line Items]
Effective interest rate	2.91%	2.91%	2.91%	2.91%	2.91%	2.91%
Long-term Debt	$ 1,494			$ 1,493
Stated interest rate (as a percent)	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%
6.95% Notes due 2029
Debt Instrument [Line Items]
Effective interest rate	7.14%	7.14%	7.14%	7.14%	7.14%	7.14%
Long-term Debt	$ 297			$ 297
Stated interest rate (as a percent)	6.95%	6.95%	6.95%	6.95%	6.95%	6.95%
4.95% Debentures due 2033
Debt Instrument [Line Items]
Effective interest rate	4.95%	4.95%	4.95%	4.95%	4.95%	4.95%
Long-term Debt	$ 498			$ 498
Stated interest rate (as a percent)	4.95%	4.95%	4.95%	4.95%	4.95%	4.95%
4.375% Notes due 2033
Debt Instrument [Line Items]
Effective interest rate	4.24%	4.24%	4.24%	4.24%	4.24%	4.24%
Long-term Debt	$ 855			$ 856
Stated interest rate (as a percent)	4.375%	4.375%	4.375%	4.375%	4.375%	4.375%
1.650% Notes due 2035 (1.5B Euro 1.1096)(2)/(1.5B Euro 1.14)(3)
Debt Instrument [Line Items]
Effective interest rate	1.68%	1.68%	1.68%	1.68%	1.68%	1.68%
Long-term Debt	$ 1,649			$ 1,693
Stated interest rate (as a percent)	1.65%	1.65%	1.65%	1.65%	1.65%	1.65%
Debt Instrument, Face Amount | €			€ 1,500			€ 1,500
Foreign Currency Exchange Rate, Translation	1.1096	1.1096	1.1096	1.14	1.14	1.14
3.55% Notes due 2036
Debt Instrument [Line Items]
Effective interest rate	3.59%	3.59%	3.59%	3.59%	3.59%	3.59%
Long-term Debt	$ 989			$ 988
Stated interest rate (as a percent)	3.55%	3.55%	3.55%	3.55%	3.55%	3.55%
5.95% Notes due 2037
Debt Instrument [Line Items]
Effective interest rate	5.99%	5.99%	5.99%	5.99%	5.99%	5.99%
Long-term Debt	$ 992			$ 991
Stated interest rate (as a percent)	5.95%	5.95%	5.95%	5.95%	5.95%	5.95%
3.625% Notes due 2037
Debt Instrument [Line Items]
Effective interest rate	3.64%	3.64%	3.64%	3.64%	3.64%	3.64%
Long-term Debt	$ 1,487			$ 1,486
Stated interest rate (as a percent)	3.625%	3.625%	3.625%	3.625%	3.625%	3.625%
5.85% Debentures due 2038
Debt Instrument [Line Items]
Effective interest rate	5.85%	5.85%	5.85%	5.85%	5.85%	5.85%
Long-term Debt	$ 696			$ 696
Stated interest rate (as a percent)	5.85%	5.85%	5.85%	5.85%	5.85%	5.85%
3.400% Notes due 2038
Debt Instrument [Line Items]
Effective interest rate	3.42%	3.42%	3.42%	3.42%	3.42%	3.42%
Long-term Debt	$ 991			$ 990
Stated interest rate (as a percent)	3.40%	3.40%	3.40%	3.40%	3.40%	3.40%
4.50% Debentures due 2040
Debt Instrument [Line Items]
Effective interest rate	4.63%	4.63%	4.63%	4.63%	4.63%	4.63%
Long-term Debt	$ 539			$ 538
Stated interest rate (as a percent)	4.50%	4.50%	4.50%	4.50%	4.50%	4.50%
4.85% Notes due 2041
Debt Instrument [Line Items]
Effective interest rate	4.89%	4.89%	4.89%	4.89%	4.89%	4.89%
Long-term Debt	$ 297			$ 297
Stated interest rate (as a percent)	4.85%	4.85%	4.85%	4.85%	4.85%	4.85%
4.50% Notes due 2043
Debt Instrument [Line Items]
Effective interest rate	4.52%	4.52%	4.52%	4.52%	4.52%	4.52%
Long-term Debt	$ 495			$ 495
Stated interest rate (as a percent)	4.50%	4.50%	4.50%	4.50%	4.50%	4.50%
3.70% Notes due 2046
Debt Instrument [Line Items]
Effective interest rate	3.74%	3.74%	3.74%	3.74%	3.74%	3.74%
Long-term Debt	$ 1,973			$ 1,972
Stated interest rate (as a percent)	3.70%	3.70%	3.70%	3.70%	3.70%	3.70%
3.75% Notes due 2047
Debt Instrument [Line Items]
Effective interest rate	3.76%	3.76%	3.76%	3.76%	3.76%	3.76%
Long-term Debt	$ 991			$ 991
Stated interest rate (as a percent)	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%
3.500% Notes due 2048
Debt Instrument [Line Items]
Effective interest rate	3.52%	3.52%	3.52%	3.52%	3.52%	3.52%
Long-term Debt	$ 742			$ 742
Stated interest rate (as a percent)	3.50%	3.50%	3.50%	3.50%	3.50%	3.50%
Other
Debt Instrument [Line Items]
Effective interest rate	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
Long-term Debt	$ 18			$ 24