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Summary of Significant Accounting Policies - Income Taxes (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2019 USD ($)
Income Taxes [Line Items] |
Total amount of unrecognized tax benefits relating to uncertain tax positions | $ 39.1
Decrease in the total amount of unrecognized tax benefits relating to uncertain tax positions | (2.0)
Decrease resulted primarily from a favorable settlements related to certain non-U.S. income tax obligations of an acquired business and the expiration of U.S. state income tax statutes | 7.5
Increase in reserves for uncertain tax positions expected to be taken in current year | 5.5
Maximum |
Income Taxes [Line Items] |
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months | $ 3.0

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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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