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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Jan. 31, 2018
Other Comprehensive Income (Loss), Tax [Abstract] |
Composition of accumulated other comprehensive income (loss) | The following table provides the changes in the composition of total accumulated other comprehensive loss for fiscal 2018, 2017 and 2016:
(Amounts in millions and net of income taxes) | Currency Translation and Other |  | Net Investment Hedges |  | Unrealized Gain on Available-for-Sale Securities |  | Cash Flow Hedges |  | Minimum Pension Liability |  | Total
Balances as of February 1, 2015 | $ | (7,011 | ) |  | $ | 656 |  |  | $ | — |  |  | $ | (134 | ) |  | $ | (679 | ) |  | $ | (7,168 | )
Other comprehensive income (loss) before reclassifications, net | (4,679 | ) |  | 366 |  |  | — |  |  | (217 | ) |  | 96 |  |  | (4,434 | )
Amounts reclassified from accumulated other comprehensive loss, net | — |  |  | — |  |  | — |  |  | 15 |  |  | (10 | ) |  | 5 |
Balances as of January 31, 2016 | (11,690 | ) |  | 1,022 |  |  | — |  |  | (336 | ) |  | (593 | ) |  | (11,597 | )
Other comprehensive income (loss) before reclassifications, net | (2,817 | ) |  | 413 |  |  | 145 |  |  | (22 | ) |  | (389 | ) |  | (2,670 | )
Amounts reclassified from accumulated other comprehensive loss, net | — |  |  | — |  |  | — |  |  | 43 |  |  | (8 | ) |  | 35 |
Balances as of January 31, 2017 | (14,507 | ) |  | 1,435 |  |  | 145 |  |  | (315 | ) |  | (990 | ) |  | (14,232 | )
Other comprehensive income (loss) before reclassifications, net | 2,345 |  |  | (405 | ) |  | 1,501 |  |  | 436 |  |  | 83 |  |  | 3,960 |
Amounts reclassified from accumulated other comprehensive loss, net | 26 |  |  | — |  |  | — |  |  | 1 |  |  | 64 |  |  | 91 |
Balances as of January 31, 2018 | $ | (12,136 | ) |  | $ | 1,030 |  |  | $ | 1,646 |  |  | $ | 122 |  |  | $ | (843 | ) |  | $ | (10,181 | )

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- References No definition available. + Details
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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e526-108580 + Details
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