Income Taxes Significant Components of Company's Income Tax Provision from Continuing Operations (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||
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Dec. 31, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2017 |
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Components of Income Tax [Line Items] | ||||
Tax expense at Ireland statutory rate | $ 132 | $ 193 | $ 144 | |
U.S. state income tax, net of federal benefit | 15 | 15 | 8 | |
Income subject to the U.S. federal tax rate | (110) | 39 | (311) | |
Income subject to rates different than the statutory rate | 38 | (201) | 185 | |
Reserve and valuation allowance adjustments | $ (76) | (284) | 31 | (164) |
Impact of acquisitions and divestitures | 0 | 16 | 475 | |
U.S. Tax Reform discrete items | 0 | 108 | 0 | |
Restructuring and impairment costs | (24) | (4) | (15) | |
Income tax provision | $ (233) | $ 197 | $ 322 | |
Ireland statutory rate | 12.50% | 12.50% | 12.50% | |
IRELAND | ||||
Components of Income Tax [Line Items] | ||||
Ireland statutory rate | 12.50% | 12.50% | 12.50% |
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- Definition [Line Items] for Components of Income Tax [Table] No definition available.
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- Definition Effective Income Tax Rate Reconciliation, Acquisitions and Dispositions of Business, Amount No definition available.
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- Definition Income Tax Reconciliation Foreign Income Tax Rate Differential, Non-US No definition available.
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- Definition IncomeTaxReconciliationForeignIncomeTaxRateDifferentialUS No definition available.
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible restructuring charges. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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