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Income Taxes (Tables) | 12 Months Ended
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Mar. 31, 2015
Income Tax Disclosure [Abstract] |
Income from Continuing Operations before Income Taxes |
| Years Ended March 31,
(In millions) | 2015 |  | 2014 |  | 2013
Income from continuing operations before income taxes |  |  |  |  |
U.S. | $ | 1,893 |  |  | $ | 1,554 |  |  | $ | 1,562 |
Foreign | 764 |  |  | 617 |  |  | 388 |
Total income from continuing operations before income taxes | $ | 2,657 |  |  | $ | 2,171 |  |  | $ | 1,950 |
Components of Provision For Income Taxes Related to Continuing Operations | Income tax expense related to continuing operations consists of the following:
| Years Ended March 31,
(In millions) | 2015 |  | 2014 |  | 2013
Current |  |  |  |  |
Federal | $ | 453 |  |  | $ | 484 |  |  | $ | (84 | )
State | 90 |  |  | 64 |  |  | 14 |
Foreign | 101 |  |  | 193 |  |  | 46 |
Total current | 644 |  |  | 741 |  |  | (24 | )
Deferred |  |  |  |  |
Federal | 195 |  |  | 24 |  |  | 538 |
State | 53 |  |  | 10 |  |  | 80 |
Foreign | (77 | ) |  | (18 | ) |  | (7 | )
Total deferred | 171 |  |  | 16 |  |  | 611 |
Income tax expense | $ | 815 |  |  | $ | 757 |  |  | $ | 587 |
Reconciliation Between Effective Tax Rate on Income From Continuing Operations and Statutory Tax Rate | The reconciliation between our effective tax rate on income from continuing operations and statutory tax rate is as follows:
| Years Ended March 31,
(In millions) | 2015 |  | 2014 |  | 2013
Income tax expense at federal statutory rate | $ | 930 |  |  | $ | 760 |  |  | $ | 683 |
State income taxes net of federal tax benefit | 81 |  |  | 57 |  |  | 58 |
Foreign income taxed at various rates | (247 | ) |  | (177 | ) |  | (143 | )
Canadian litigation | — |  |  | 122 |  |  | — |
Controlled substance distribution reserve | 58 |  |  | — |  |  | — |
Unrecognized tax benefits and settlements | 10 |  |  | (6 | ) |  | 1 |
Tax credits | (10 | ) |  | (6 | ) |  | (13 | )
Other, net | (7 | ) |  | 7 |  |  | 1 |
Income tax expense | $ | 815 |  |  | $ | 757 |  |  | $ | 587 |
Components of Deferred Tax Assets and Liabilities | Deferred tax balances consisted of the following:
| March 31,
(In millions) | 2015 |  | 2014
Assets |  |  |
Receivable allowances | $ | 83 |  |  | $ | 94 |
Deferred revenue | 72 |  |  | 136 |
Compensation and benefit related accruals | 681 |  |  | 632 |
Net operating loss and credit carryforwards | 316 |  |  | 337 |
Other | 266 |  |  | 287 |
Subtotal | 1,418 |  |  | 1,486 |
Less: valuation allowance | (229 | ) |  | (200 | )
Total assets | 1,189 |  |  | 1,286 |
Liabilities |  |  |
Inventory valuation and other assets | (2,333 | ) |  | (2,161 | )
Fixed assets and systems development costs | (324 | ) |  | (320 | )
Intangibles | (1,073 | ) |  | (1,477 | )
Other | (61 | ) |  | (117 | )
Total liabilities | (3,791 | ) |  | (4,075 | )
Net deferred tax liability | $ | (2,602 | ) |  | $ | (2,789 | )
Current net deferred tax asset | $ | 26 |  |  | $ | 42 |
Current net deferred tax liability | (1,819 | ) |  | (1,588 | )
Long-term deferred tax asset | 50 |  |  | 19 |
Long-term deferred tax liability | (859 | ) |  | (1,262 | )
Net deferred tax liability | $ | (2,602 | ) |  | $ | (2,789 | )
Gross Unrecognized Tax Benefits | The following table summarizes the activity related to our gross unrecognized tax benefits for the last three years:
| Years Ended March 31,
(In millions) | 2015 |  | 2014 |  | 2013
Unrecognized tax benefits at beginning of period | $ | 647 |  |  | $ | 560 |  |  | $ | 595 |
Additions based on tax positions related to prior years | 62 |  |  | 106 |  |  | 46 |
Reductions based on tax positions related to prior years | (18 | ) |  | (23 | ) |  | (106 | )
Additions based on tax positions related to current year | 27 |  |  | 23 |  |  | 31 |
Reductions based on settlements | (65 | ) |  | (4 | ) |  | (2 | )
Reductions based on the lapse of the applicable statutes of limitations | (12 | ) |  | (7 | ) |  | (2 | )
Exchange rate fluctuations | (25 | ) |  | (8 | ) |  | (2 | )
Unrecognized tax benefits at end of period | $ | 616 |  |  | $ | 647 |  |  | $ | 560 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure of income before income tax between domestic and foreign jurisdictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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