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Income Taxes - Reconciliation Between Effective Tax Rate On Income From Continuing Operations And Statutory Tax Rate (Details) - USD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
Income Tax Disclosure [Abstract] |  |  |
Income tax expense at federal statutory rate | $ 240 | $ 128 | $ 75
State income taxes, net of federal tax benefit | (41) | 70 | 50
Tax effect of foreign operations | (81) | (86) | (146)
Unrecognized tax benefits and settlements | (7) | 20 | 454
Non-deductible goodwill | 7 | 357 | 585
Share-based compensation | 2 | 4 | (8)
Net tax benefit on intellectual property transfer | 0 | (42) | (178)
Tax-free gain on investment exit | (87) | 0 | 0
Impact of change in U.S. tax rate on temporary differences | 0 | (81) | (1,324)
Transition tax on foreign earnings | 0 | (5) | 457
Capital loss carryback | (19) | 0 | 0
Other, net | 4 | (9) | (18)
Income tax expense (benefit) | $ 18 | $ 356 | $ (53)

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- Definition Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to increase (decrease) from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act. + References No definition available. + Details
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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 740 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117330312&loc=d3e23163-113944 + Details
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