Debt (Long-term Debt) (Details) - USD ($) $ in Millions | 12 Months Ended | |
Feb. 03, 2019 | Jan. 28, 2018 |
Debt Instrument [Line Items] | | |
Debt Instrument, Face Amount | $ 27,100 | |
Senior Notes | 26,814 | $ 24,485 |
Capital lease obligations; payable in varying installments through January 31, 2055 | 1,049 | 984 |
Total long-term debt | 27,863 | 25,469 |
Less current installments | 1,056 | 1,202 |
Long-term debt, excluding current installments | $ 26,807 | 24,267 |
2.25% Senior Notes due September 10, 2018 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on March 10 and September 10 | |
Debt Instrument, Face Amount | $ 0 | |
Senior Notes | $ 0 | 1,150 |
Debt Instrument, Interest Rate, Stated Percentage | 2.25% | |
Debt Instrument, Maturity Date | Sep. 10, 2018 | |
2.00% Senior Notes due June 15, 2019 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on June 15 and December 15 | |
Debt Instrument, Face Amount | $ 1,000 | |
Senior Notes | $ 999 | 998 |
Debt Instrument, Interest Rate, Stated Percentage | 2.00% | |
Debt Instrument, Maturity Date | Jun. 15, 2019 | |
Floating Rate Senior Notes due June 5, 2020 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Quarterly on March 5, June 5, September 5, and December 5 | |
Debt Instrument, Face Amount | $ 500 | |
Senior Notes | $ 499 | 499 |
Debt Instrument, Maturity Date | Jun. 5, 2020 | |
1.80% Senior Notes due June 5, 2020 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on June 5 and December 5 | |
Debt Instrument, Face Amount | $ 750 | |
Senior Notes | $ 749 | 748 |
Debt Instrument, Interest Rate, Stated Percentage | 1.80% | |
Debt Instrument, Maturity Date | Jun. 5, 2020 | |
Unamortized discount | $ 1 | |
3.95% Senior Notes due September 15, 2020 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on March 15 and September 15 | |
Debt Instrument, Face Amount | $ 500 | |
Senior Notes | $ 499 | 501 |
Debt Instrument, Interest Rate, Stated Percentage | 3.95% | |
Debt Instrument, Maturity Date | Sep. 15, 2020 | |
4.40% Senior Notes due April 1, 2021 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on April 1 and October 1 | |
Debt Instrument, Face Amount | $ 1,000 | |
Senior Notes | $ 999 | 998 |
Debt Instrument, Interest Rate, Stated Percentage | 4.40% | |
Debt Instrument, Maturity Date | Apr. 1, 2021 | |
2.00% Senior Notes due April 1, 2021 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on April 1 and October 1 | |
Debt Instrument, Face Amount | $ 1,350 | |
Senior Notes | $ 1,345 | 1,343 |
Debt Instrument, Interest Rate, Stated Percentage | 2.00% | |
Debt Instrument, Maturity Date | Apr. 1, 2021 | |
3.25% Senior Notes Due March 1, 2022 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on March 1 and September 1 | |
Debt Instrument, Face Amount | $ 700 | |
Senior Notes | $ 696 | 0 |
Debt Instrument, Interest Rate, Stated Percentage | 3.25% | |
Debt Instrument, Maturity Date | Mar. 1, 2022 | |
Unamortized discount | $ 2 | |
Floating Rate Senior Notes Due March 1, 2022 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Quarterly on March 1, June 1, September 1, and December 1 | |
Debt Instrument, Face Amount | $ 300 | |
Senior Notes | $ 299 | 0 |
Debt Instrument, Maturity Date | Mar. 1, 2022 | |
2.625% Senior Notes due June 1, 2022 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on June 1 and December 1 | |
Debt Instrument, Face Amount | $ 1,250 | |
Senior Notes | $ 1,245 | 1,243 |
Debt Instrument, Interest Rate, Stated Percentage | 2.625% | |
Debt Instrument, Maturity Date | Jun. 1, 2022 | |
2.70% Senior Notes due April 1, 2023 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on April 1 and October 1 | |
Debt Instrument, Face Amount | $ 1,000 | |
Senior Notes | $ 997 | 996 |
Debt Instrument, Interest Rate, Stated Percentage | 2.70% | |
Debt Instrument, Maturity Date | Apr. 1, 2023 | |
3.75% Senior Notes due February 15, 2024 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on February 15 and August 15 | |
Debt Instrument, Face Amount | $ 1,100 | |
Senior Notes | $ 1,094 | 1,093 |
Debt Instrument, Interest Rate, Stated Percentage | 3.75% | |
Debt Instrument, Maturity Date | Feb. 15, 2024 | |
3.35% Senior Notes due September 15, 2025 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on March 15 and September 15 | |
Debt Instrument, Face Amount | $ 1,000 | |
Senior Notes | $ 995 | 995 |
Debt Instrument, Interest Rate, Stated Percentage | 3.35% | |
Debt Instrument, Maturity Date | Sep. 15, 2025 | |
3.00% Senior Notes due April 1, 2026 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on April 1 and October 1 | |
Debt Instrument, Face Amount | $ 1,300 | |
Senior Notes | $ 1,288 | 1,287 |
Debt Instrument, Interest Rate, Stated Percentage | 3.00% | |
Debt Instrument, Maturity Date | Apr. 1, 2026 | |
2.125% Senior Notes due September 15, 2026 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on March 15 and September 15 | |
Debt Instrument, Face Amount | $ 1,000 | |
Senior Notes | $ 987 | 986 |
Debt Instrument, Interest Rate, Stated Percentage | 2.125% | |
Debt Instrument, Maturity Date | Sep. 15, 2026 | |
2.80% Senior Notes due September 14, 2027 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on March 14 and September 14 | |
Debt Instrument, Face Amount | $ 1,000 | |
Senior Notes | $ 981 | 980 |
Debt Instrument, Interest Rate, Stated Percentage | 2.80% | |
Debt Instrument, Maturity Date | Sep. 14, 2027 | |
Unamortized discount | $ 3 | |
Debt Issuance Costs, Gross | $ 6 | |
3.90% Senior Notes Due December 6, 2028 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on June 6 and December 6 | |
Debt Instrument, Face Amount | $ 1,000 | |
Senior Notes | $ 1,005 | 0 |
Debt Instrument, Interest Rate, Stated Percentage | 3.90% | |
Debt Instrument, Maturity Date | Dec. 6, 2028 | |
Unamortized discount | $ 7 | |
5.875% Senior Notes due December 16, 2036 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on June 16 and December 16 | |
Debt Instrument, Face Amount | $ 3,000 | |
Senior Notes | $ 2,951 | 2,949 |
Debt Instrument, Interest Rate, Stated Percentage | 5.875% | |
Debt Instrument, Maturity Date | Dec. 16, 2036 | |
5.40% Senior Notes due September 15, 2040 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on March 15 and September 15 | |
Debt Instrument, Face Amount | $ 500 | |
Senior Notes | $ 495 | 495 |
Debt Instrument, Interest Rate, Stated Percentage | 5.40% | |
Debt Instrument, Maturity Date | Sep. 15, 2040 | |
5.95% Senior Notes due April 1, 2041 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on April 1 and October 1 | |
Debt Instrument, Face Amount | $ 1,000 | |
Senior Notes | $ 989 | 988 |
Debt Instrument, Interest Rate, Stated Percentage | 5.95% | |
Debt Instrument, Maturity Date | Apr. 1, 2041 | |
4.20% Senior Notes due April 1, 2043 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on April 1 and October 1 | |
Debt Instrument, Face Amount | $ 1,000 | |
Senior Notes | $ 989 | 988 |
Debt Instrument, Interest Rate, Stated Percentage | 4.20% | |
Debt Instrument, Maturity Date | Apr. 1, 2043 | |
4.875% Senior Notes due February 15, 2044 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on February 15 and August 15 | |
Debt Instrument, Face Amount | $ 1,000 | |
Senior Notes | $ 979 | 978 |
Debt Instrument, Interest Rate, Stated Percentage | 4.875% | |
Debt Instrument, Maturity Date | Feb. 15, 2044 | |
4.40% Senior Notes due March 15, 2045 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on March 15 and September 15 | |
Debt Instrument, Face Amount | $ 1,000 | |
Senior Notes | $ 977 | 977 |
Debt Instrument, Interest Rate, Stated Percentage | 4.40% | |
Debt Instrument, Maturity Date | Mar. 15, 2045 | |
4.25% Senior Notes due April 1, 2046 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on April 1 and October 1 | |
Debt Instrument, Face Amount | $ 1,600 | |
Senior Notes | $ 1,585 | 1,584 |
Debt Instrument, Interest Rate, Stated Percentage | 4.25% | |
Debt Instrument, Maturity Date | Apr. 1, 2046 | |
3.90% Senior Notes due June 15, 2047 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually June 15 and September 15 | |
Debt Instrument, Face Amount | $ 750 | |
Senior Notes | $ 738 | 738 |
Debt Instrument, Interest Rate, Stated Percentage | 3.90% | |
Debt Instrument, Maturity Date | Jun. 15, 2047 | |
Unamortized discount | $ 5 | |
4.50% Senior Notes Due December 6, 2048 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on June 6 and December 6 | |
Debt Instrument, Face Amount | $ 1,500 | |
Senior Notes | $ 1,462 | 0 |
Debt Instrument, Interest Rate, Stated Percentage | 4.50% | |
Debt Instrument, Maturity Date | Dec. 6, 2048 | |
Unamortized discount | $ 25 | |
December 2018 Issuance [Member] | | |
Debt Instrument [Line Items] | | |
Debt Issuance Costs, Gross | $ 22 | |
3.5% Senior Notes due September 15, 2056 [Member] | | |
Debt Instrument [Line Items] | | |
Frequency of Interest Payment | Semi-annually on March 15 and September 15 | |
Debt Instrument, Face Amount | $ 1,000 | |
Senior Notes | $ 972 | $ 971 |
Debt Instrument, Interest Rate, Stated Percentage | 3.50% | |
Debt Instrument, Maturity Date | Sep. 15, 2056 | |
June 2017 Issuance [Member] | | |
Debt Instrument [Line Items] | | |
Debt Issuance Costs, Gross | $ 12 | |
London Interbank Offered Rate (LIBOR) [Member] | Floating Rate Senior Notes due June 5, 2020 [Member] | | |
Debt Instrument [Line Items] | | |
Debt Instrument, Basis Spread on Variable Rate | 15.00% | |
London Interbank Offered Rate (LIBOR) [Member] | Floating Rate Senior Notes Due March 1, 2022 [Member] | | |
Debt Instrument [Line Items] | | |
Debt Instrument, Basis Spread on Variable Rate | 31.00% | |