v2.4.1.9

Stock Based Compensation (Tables) | 12 Months Ended
--- | ---
Jan. 31, 2015
Nonvested Restricted Stock Shares Activity [Table Text Block] | Activity related to restricted stock awards for 2014 is as follows:
| Shares |  | Weighted Average Grant Date Fair Value
| (thousands) |  |
Nonvested, beginning of period | 79.2 |  |  | $ | 22.58 |
Granted | — |  |  | — |
Forfeited | (0.6 | ) |  | 23.43 |
Vested | (52.7 | ) |  | 22.16 |
Nonvested, end of period | 25.9 |  |  | $ | 23.43 |
Components of Stock Based Compensation Expense | Stock-based compensation expense included the following components:
| 2014 |  | 2013 |  | 2012
| (millions)
Stock options | $ | 47 |  |  | $ | 36 |  |  | $ | 28 |
Restricted stock units | 26 |  |  | 25 |  |  | 26 |
Restricted stock | — |  |  | 1 |  |  | 1 |
Stock credits | — |  |  | — |  |  | 6 |
| $ | 73 |  |  | $ | 62 |  |  | $ | 61 |
Weighted Average Assumption Used To Estimate Fair Value of Stock Options | The fair value of stock options granted during 2014, 2013 and 2012 and the weighted average assumptions used to estimate the fair value are as follows:
| 2014 |  | 2013 |  | 2012
Weighted average grant date fair value of stock options granted during the period | $ | 19.07 |  |  | $ | 12.15 |  |  | $ | 12.22 |
Dividend yield | 2.5 | % |  | 2.8 | % |  | 2.2 | %
Expected volatility | 42.7 | % |  | 41.3 | % |  | 39.8 | %
Risk-free interest rate | 1.5 | % |  | 0.8 | % |  | 1.2 | %
Expected life | 5.7 years |  |  | 5.7 years |  |  | 5.7 years |
Schedule of Stock Option Activity | Activity related to stock options for 2014 is as follows:
| Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life |  | Aggregate Intrinsic Value
| (thousands) |  |  |  | (years) |  | (millions)
Outstanding, beginning of period | 23,313.6 |  |  | $ | 32.02 |  |  |  |  |
Granted | 3,296.0 |  |  | $ | 58.92 |  |  |  |  |
Canceled or forfeited | (468.4 | ) |  | $ | 41.10 |  |  |  |  |
Exercised | (6,462.4 | ) |  | $ | 30.98 |  |  |  |  |
Outstanding, end of period | 19,678.8 |  |  | $ | 36.65 |  |  |  |  |
Exercisable, end of period | 11,405.5 |  |  | $ | 30.06 |  |  | 4.0 |  | $ | 386 |
Options expected to vest | 7,280.5 |  |  | $ | 45.73 |  |  | 8.1 |  | $ | 132 |
Additional Information Relating to Stock Options | Additional information relating to stock options is as follows:
| 2014 |  | 2013 |  | 2012
| (millions)
Intrinsic value of options exercised | $ | 189 |  |  | $ | 207 |  |  | $ | 132 |
Grant date fair value of stock options that vested during the year | 38 |  |  | 31 |  |  | 30 |
Cash received from stock options exercised | 200 |  |  | 254 |  |  | 164 |
Excess tax benefits realized from exercised stock options | 43 |  |  | 51 |  |  | 36 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] | Activity related to restricted stock units for 2014 is as follows:
| Shares |  | Weighted Average Grant Date Fair Value
| (thousands) |  |
Nonvested, beginning of period | 1,191.8 |  |  | $ | 41.16 |
Granted – performance-based | 289.3 |  |  | 59.81 |
Performance adjustment | 46.9 |  |  | 40.63 |
Granted – time-based | 202.3 |  |  | 58.83 |
Dividend equivalents | 21.0 |  |  | 59.52 |
Forfeited | (37.1 | ) |  | 42.12 |
Vested | (421.3 | ) |  | 40.40 |
Nonvested, end of period | 1,292.9 |  |  | $ | 48.47 |
Restricted Stock Units [Member] |
Activity Related to Restricted Stock and Restricted Stock Units | Restricted Stock and Restricted Stock Units The weighted average grant date fair values of restricted stock units granted during 2014, 2013 and 2012 are as follows:
| 2014 |  | 2013 |  | 2012
Restricted stock units | $ | 59.41 |  |  | $ | 42.54 |  |  | $ | 39.52 |

X
- Definition Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Options Additional Information Table Text Block + References No definition available. + Details
Name: | m_ScheduleOfShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsAdditionalInformationTableTextBlock
Namespace Prefix: | m_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + 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 (c) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |