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Retirement-Related Benefits (Tables) | 12 Months Ended
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Jan. 31, 2018
Retirement Benefits [Abstract] |
Schedule of contribution expense related to defined contribution plans | The following table summarizes the contribution expense related to the Company's defined contribution plans for fiscal 2018, 2017 and 2016:
| Fiscal Years Ended January 31,
(Amounts in millions) | 2018 |  | 2017 |  | 2016
Defined contribution plans: |  |  |  |  |
U.S. | $ | 1,124 |  |  | $ | 1,064 |  |  | $ | 967 |
International | 126 |  |  | 173 |  |  | 179 |
Total contribution expense for defined contribution plans | $ | 1,250 |  |  | $ | 1,237 |  |  | $ | 1,146 |

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- Definition Tabular disclosure of the costs related to the various types of retirement plans including defined benefit pension plan cost, defined contribution plan cost, other postretirement benefit plan cost, and net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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