Marketable Securities (Details) - USD ($) $ in Millions | Oct. 29, 2017 | Jan. 29, 2017 |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | $ 6,140 | $ 5,484 |
Unrealized Gain | 2 | 3 |
Unrealized Loss | (15) | (19) |
Classified as: | | |
Cash equivalents | 2,609 | 436 |
Marketable securities | 3,518 | 5,032 |
Total cash equivalents and marketable securities | 6,127 | 5,468 |
Amortized Cost | | |
Less than one year | 4,074 | 2,209 |
Due in 1-5 years | 2,024 | 3,210 |
Mortgage-backed securities issued by government-sponsored enterprises not due to a single maturity date | 42 | 65 |
Total | 6,140 | 5,484 |
Estimated Fair Value | | |
Less than one year | 4,072 | 2,209 |
Due in 1-5 years | 2,013 | 3,194 |
Mortgage-backed securities issued by United States government-sponsored enterprises not due to a single maturity date | 42 | 65 |
Total | 6,127 | 5,468 |
Fair value, unrealized loss position | | |
Fair value, unrealized loss less than 12 months | 2,301 | |
Fair value, unrealized loss greater than 12 months | 849 | |
Fair value with unrealized loss, total | 3,150 | |
Unrealized Loss Position, Aggregate Losses | | |
Unrealized loss, less than 12 months, gross | (9) | |
Unrealized loss, 12 months or greater, gross | (6) | |
Gross unrealized loss, total | (15) | |
Corporate debt securities | | |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | 1,515 | 2,397 |
Unrealized Gain | 0 | 1 |
Unrealized Loss | (5) | (10) |
Classified as: | | |
Cash equivalents | 0 | 33 |
Marketable securities | 1,510 | 2,355 |
Total cash equivalents and marketable securities | 1,510 | 2,388 |
Fair value, unrealized loss position | | |
Fair value, unrealized loss less than 12 months | 867 | |
Fair value, unrealized loss greater than 12 months | 407 | |
Fair value with unrealized loss, total | 1,274 | |
Unrealized Loss Position, Aggregate Losses | | |
Unrealized loss, less than 12 months, gross | (3) | |
Unrealized loss, 12 months or greater, gross | (2) | |
Gross unrealized loss, total | (5) | |
Debt securities of United States government agencies | | |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | 907 | 1,193 |
Unrealized Gain | 0 | 0 |
Unrealized Loss | (5) | (5) |
Classified as: | | |
Cash equivalents | 0 | 27 |
Marketable securities | 902 | 1,161 |
Total cash equivalents and marketable securities | 902 | 1,188 |
Fair value, unrealized loss position | | |
Fair value, unrealized loss less than 12 months | 666 | |
Fair value, unrealized loss greater than 12 months | 236 | |
Fair value with unrealized loss, total | 902 | |
Unrealized Loss Position, Aggregate Losses | | |
Unrealized loss, less than 12 months, gross | (3) | |
Unrealized loss, 12 months or greater, gross | (2) | |
Gross unrealized loss, total | (5) | |
Debt securities issued by the United States Treasury | | |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | 638 | 852 |
Unrealized Gain | 0 | 0 |
Unrealized Loss | (3) | (2) |
Classified as: | | |
Cash equivalents | 0 | 55 |
Marketable securities | 635 | 795 |
Total cash equivalents and marketable securities | 635 | 850 |
Fair value, unrealized loss position | | |
Fair value, unrealized loss less than 12 months | 509 | |
Fair value, unrealized loss greater than 12 months | 126 | |
Fair value with unrealized loss, total | 635 | |
Unrealized Loss Position, Aggregate Losses | | |
Unrealized loss, less than 12 months, gross | (2) | |
Unrealized loss, 12 months or greater, gross | (1) | |
Gross unrealized loss, total | (3) | |
Asset-backed Securities | | |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | 289 | 490 |
Unrealized Gain | 0 | 0 |
Unrealized Loss | (1) | (1) |
Classified as: | | |
Cash equivalents | 0 | 0 |
Marketable securities | 288 | 489 |
Total cash equivalents and marketable securities | 288 | 489 |
Fair value, unrealized loss position | | |
Fair value, unrealized loss less than 12 months | 233 | |
Fair value, unrealized loss greater than 12 months | 44 | |
Fair value with unrealized loss, total | 277 | |
Unrealized Loss Position, Aggregate Losses | | |
Unrealized loss, less than 12 months, gross | (1) | |
Unrealized loss, 12 months or greater, gross | 0 | |
Gross unrealized loss, total | (1) | |
Mortgage backed securities issued by United States government-sponsored enterprises | | |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | 140 | 161 |
Unrealized Gain | 2 | 2 |
Unrealized Loss | (1) | (1) |
Classified as: | | |
Cash equivalents | 0 | 0 |
Marketable securities | 141 | 162 |
Total cash equivalents and marketable securities | 141 | 162 |
Fair value, unrealized loss position | | |
Fair value, unrealized loss less than 12 months | 26 | |
Fair value, unrealized loss greater than 12 months | 36 | |
Fair value with unrealized loss, total | 62 | |
Unrealized Loss Position, Aggregate Losses | | |
Unrealized loss, less than 12 months, gross | 0 | |
Unrealized loss, 12 months or greater, gross | (1) | |
Gross unrealized loss, total | (1) | |
Foreign government bonds | | |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | 42 | 70 |
Unrealized Gain | 0 | 0 |
Unrealized Loss | 0 | 0 |
Classified as: | | |
Cash equivalents | 0 | 0 |
Marketable securities | 42 | 70 |
Total cash equivalents and marketable securities | 42 | 70 |
Money market funds | | |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | 2,609 | 321 |
Unrealized Gain | 0 | 0 |
Unrealized Loss | 0 | 0 |
Classified as: | | |
Cash equivalents | 2,609 | 321 |
Marketable securities | 0 | 0 |
Total cash equivalents and marketable securities | $ 2,609 | $ 321 |