Income Taxes (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
---|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Jun. 30, 2019 |
|
Income Tax Footnote Disclosure [Line Items] | |||||
Deferred Tax Assets, Net of Valuation Allowance | $ 630 | $ 630 | $ 1,170 | ||
Deferred Tax Assets, Net | 1,800 | 1,800 | |||
Deferred Tax Assets, Valuation Allowance | 200 | $ 200 | 100 | ||
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $ 100 | ||||
Gross unrecognized tax benefits | $ 90 | ||||
Operating Loss Carryforward, Term | 7 years | ||||
Effective tax rates | (201.00%) | 7.60% | (216.00%) | 7.90% | |
United States statutory tax rate | 21.00% | ||||
Decrease in Unrecognized Tax Benefits is Reasonably Possible | $ 10 | $ 10 | |||
Pro Forma [Member] | |||||
Income Tax Footnote Disclosure [Line Items] | |||||
Effective tax rates | 12.70% | 13.60% |
X | ||||||||||
- Definition [Line Items] for Income Tax Footnote Disclosure [Table] No definition available.
|
X | ||||||||||
- Definition Operating Loss Carryforward, Term No definition available.
|
X | ||||||||||
- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
X | ||||||||||
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Details
|