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Shareholders' Equity (Tables) | 12 Months Ended
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Jan. 31, 2018
Share-based Compensation [Abstract] |
Schedule of share-based compensation expense by award type | The following table summarizes the Company's share-based compensation expense by award type:
| Fiscal Years Ended January 31,
(Amounts in millions) | 2018 |  | 2017 |  | 2016
Restricted stock and performance share units | $ | 234 |  |  | $ | 237 |  |  | $ | 134 |
Restricted stock units | 368 |  |  | 332 |  |  | 292 |
Other | 24 |  |  | 27 |  |  | 22 |
Share-based compensation expense | $ | 626 |  |  | $ | 596 |  |  | $ | 448 |
Schedule of restricted stock and performance share awards and restricted stock rights activity | The following table shows the activity for restricted stock and performance share units and restricted stock units during fiscal 2018:
|  | Restricted Stock and Performance Share Units(1) |  | Restricted Stock Units
(Shares in thousands) |  | Shares |  | Weighted-Average Grant-Date Fair Value Per Share |  | Shares |  | Weighted-Average Grant-Date Fair Value Per Share
Outstanding at February 1, 2017 |  | 9,077 |  |  | $ | 68.61 |  |  | 24,276 |  |  | $ | 65.52 |
Granted |  | 3,598 |  |  | 74.73 |  |  | 8,570 |  |  | 67.54 |
Vested/exercised |  | (2,525 | ) |  | 71.55 |  |  | (5,440 | ) |  | 63.02 |
Forfeited or expired |  | (1,592 | ) |  | 68.59 |  |  | (3,253 | ) |  | 66.28 |
Outstanding at January 31, 2018 |  | 8,558 |  |  | $ | 70.47 |  |  | 24,153 |  |  | $ | 66.69 |
(1) | Assumes payout rate at 100% for Performance Share Units.
Schedule of restricted stock and performance share awards and restricted stock rights | The following table includes additional information related to restricted stock and performance share units and restricted stock units:
| Fiscal Years Ended January 31,
(Amounts in millions, except years) | 2018 |  | 2017 |  | 2016
Fair value of restricted stock and performance share units vested | $ | 181 |  |  | $ | 149 |  |  | $ | 142 |
Fair value of restricted stock units vested | 344 |  |  | 261 |  |  | 237 |
Unrecognized compensation cost for restricted stock and performance share units | 291 |  |  | 211 |  |  | 133 |
Unrecognized compensation cost for restricted stock units | 972 |  |  | 986 |  |  | 628 |
Weighted average remaining period to expense for restricted stock and performance share units (years) | 1.2 |  |  | 1.3 |  |  | 1.3 |
Weighted average remaining period to expense for restricted stock units (years) | 1.8 |  |  | 1.9 |  |  | 1.7 |
Schedule of Company's share repurchases | The following table provides, on a settlement date basis, the number of shares repurchased, average price paid per share and total amount paid for share repurchases for fiscal 2018, 2017 and 2016:
|  | Fiscal Years Ended January 31,
(Amounts in millions, except per share data) |  | 2018 |  | 2017 |  | 2016
Total number of shares repurchased |  | 104.9 |  |  | 119.9 |  |  | 62.4 |
Average price paid per share |  | $ | 79.11 |  |  | $ | 69.18 |  |  | $ | 65.90 |
Total cash paid for share repurchases |  | $ | 8,296 |  |  | $ | 8,298 |  |  | $ | 4,112 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 + Details
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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding and exercisable options that are fully vested and expected to vest. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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