XML 42 R31.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Income Taxes (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2018
Income Tax Disclosure [Abstract] |
Schedule of Changes in Deferred Tax Assets | Changes to certain deferred tax assets and the valuation allowance at December 31, 2017 as a result of the Company’s expected use of tax credits to meet a portion of the transition tax were as follows (in millions):
Deferred Income Tax Assets |  | Estimate Refinement |  | Originally Reported |  | Change
Net operating loss tax carryovers |  | $ | 357.0 |  |  | $ | 336.1 |  |  | $ | 20.9 |
Tax credits |  | $ | 62.4 |  |  | $ | 92.6 |  |  | $ | (30.2 | )
Gross deferred income tax assets |  | $ | 733.6 |  |  | $ | 742.9 |  |  | $ | (9.3 | )
Valuation allowance |  | (264.7 | ) |  | (274.0 | ) |  | 9.3 |
Total deferred income tax assets |  | $ | 468.9 |  |  | $ | 468.9 |  |  | $ | — |

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
Name: | us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration