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Discontinued Operations - Income (Loss) From Discontinued Operations (Details) - Big Fish Games - Discontinued Operations, Disposed of by Sale - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 09, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net revenue |  | $ 0.0 | $ 13.2 | $ 466.0
Operating expenses |  | 0.0 | 8.4 | 369.0
Selling, general and administrative expense |  | 3.5 | 6.0 | 27.8
Research and development |  | 0.0 | 0.9 | 39.6
Transaction expense, net | $ 14.1 | 0.0 | 0.0 | 4.7
Total operating expense |  | 3.5 | 15.3 | 441.1
Operating (loss) income |  | (3.5) | (2.1) | 24.9
Gain on sale of Big Fish Games | $ 219.5 | 0.0 | 219.5 | 0.0
Other expense |  | 0.0 |  | (1.7)
Other expense |  |  | 0.1 |
Total other income (loss) |  | 0.0 | 219.6 | (1.7)
(Loss) income from discontinued operations before provision for income taxes |  | (3.5) | 217.5 | 23.2
Income tax benefit (provision) |  | 1.1 | (47.3) | (5.1)
(Loss) income from discontinued operations, net of tax |  | $ (2.4) | $ 170.2 | $ 18.1

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- Definition Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=109222160&loc=SL51721523-107759 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109222160&loc=d3e1012-107759 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(12)) -URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=109222160&loc=SL51721525-107759 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109222160&loc=d3e957-107759 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(14)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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