Marketable Securities (Details) - USD ($) $ in Millions | Jul. 30, 2017 | Jan. 29, 2017 |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | $ 5,562 | $ 5,484 |
Unrealized Gain | 3 | 3 |
Unrealized Loss | (13) | (19) |
Classified as: | | |
Cash equivalents | 1,663 | 436 |
Marketable securities | 3,889 | 5,032 |
Total cash equivalents and marketable securities | 5,552 | 5,468 |
Amortized Cost | | |
Less than one year | 3,086 | 2,209 |
Due in 1-5 years | 2,423 | 3,210 |
Mortgage-backed securities issued by government-sponsored enterprises not due to a single maturity date | 53 | 65 |
Total | 5,562 | 5,484 |
Estimated Fair Value | | |
Less than one year | 3,085 | 2,209 |
Due in 1-5 years | 2,414 | 3,194 |
Mortgage-backed securities issued by United States government-sponsored enterprises not due to a single maturity date | 53 | 65 |
Total | 5,552 | 5,468 |
Fair value, unrealized loss position | | |
Fair value, unrealized loss less than 12 months | 3,113 | |
Fair value, unrealized loss greater than 12 months | 222 | |
Fair value with unrealized loss, total | 3,335 | |
Unrealized Loss Position, Aggregate Losses | | |
Unrealized loss, less than 12 months, gross | (10) | |
Unrealized loss, 12 months or greater, gross | (3) | |
Gross unrealized loss, total | (13) | |
Corporate debt securities | | |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | 1,664 | 2,397 |
Unrealized Gain | 1 | 1 |
Unrealized Loss | (5) | (10) |
Classified as: | | |
Cash equivalents | 0 | 33 |
Marketable securities | 1,660 | 2,355 |
Total cash equivalents and marketable securities | 1,660 | 2,388 |
Fair value, unrealized loss position | | |
Fair value, unrealized loss less than 12 months | 1,243 | |
Fair value, unrealized loss greater than 12 months | 86 | |
Fair value with unrealized loss, total | 1,329 | |
Unrealized Loss Position, Aggregate Losses | | |
Unrealized loss, less than 12 months, gross | (4) | |
Unrealized loss, 12 months or greater, gross | (1) | |
Gross unrealized loss, total | (5) | |
Debt securities of United States government agencies | | |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | 1,030 | 1,193 |
Unrealized Gain | 0 | 0 |
Unrealized Loss | (4) | (5) |
Classified as: | | |
Cash equivalents | 0 | 27 |
Marketable securities | 1,026 | 1,161 |
Total cash equivalents and marketable securities | 1,026 | 1,188 |
Fair value, unrealized loss position | | |
Fair value, unrealized loss less than 12 months | 881 | |
Fair value, unrealized loss greater than 12 months | 100 | |
Fair value with unrealized loss, total | 981 | |
Unrealized Loss Position, Aggregate Losses | | |
Unrealized loss, less than 12 months, gross | (3) | |
Unrealized loss, 12 months or greater, gross | (1) | |
Gross unrealized loss, total | (4) | |
Debt securities issued by the United States Treasury | | |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | 658 | 852 |
Unrealized Gain | 0 | 0 |
Unrealized Loss | (2) | (2) |
Classified as: | | |
Cash equivalents | 0 | 55 |
Marketable securities | 656 | 795 |
Total cash equivalents and marketable securities | 656 | 850 |
Fair value, unrealized loss position | | |
Fair value, unrealized loss less than 12 months | 645 | |
Fair value, unrealized loss greater than 12 months | 0 | |
Fair value with unrealized loss, total | 645 | |
Unrealized Loss Position, Aggregate Losses | | |
Unrealized loss, less than 12 months, gross | (2) | |
Unrealized loss, 12 months or greater, gross | 0 | |
Gross unrealized loss, total | (2) | |
Asset-backed Securities | | |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | 330 | 490 |
Unrealized Gain | 0 | 0 |
Unrealized Loss | (1) | (1) |
Classified as: | | |
Cash equivalents | 0 | 0 |
Marketable securities | 329 | 489 |
Total cash equivalents and marketable securities | 329 | 489 |
Fair value, unrealized loss position | | |
Fair value, unrealized loss less than 12 months | 304 | |
Fair value, unrealized loss greater than 12 months | 0 | |
Fair value with unrealized loss, total | 304 | |
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 | 153 | 161 |
Unrealized Gain | 2 | 2 |
Unrealized Loss | (1) | (1) |
Classified as: | | |
Cash equivalents | 0 | 0 |
Marketable securities | 154 | 162 |
Total cash equivalents and marketable securities | 154 | 162 |
Fair value, unrealized loss position | | |
Fair value, unrealized loss less than 12 months | 40 | |
Fair value, unrealized loss greater than 12 months | 36 | |
Fair value with unrealized loss, total | 76 | |
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 | 64 | 70 |
Unrealized Gain | 0 | 0 |
Unrealized Loss | 0 | 0 |
Classified as: | | |
Cash equivalents | 0 | 0 |
Marketable securities | 64 | 70 |
Total cash equivalents and marketable securities | 64 | 70 |
Money market funds | | |
Summary of cash equivalents and marketable securities: | | |
Amortized Cost | 1,663 | 321 |
Unrealized Gain | 0 | 0 |
Unrealized Loss | 0 | 0 |
Classified as: | | |
Cash equivalents | 1,663 | 321 |
Marketable securities | 0 | 0 |
Total cash equivalents and marketable securities | $ 1,663 | $ 321 |