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Income Taxes - Schedule Of Income Tax Difference From Statutory Rate (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 31, 2019 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Federal tax at statutory rate |  |  |  |  |  |  |  |  |  | $ 253.5 | $ 315.5 | $ 268.7
State taxes, net of federal benefits |  |  |  |  |  |  |  |  |  | 23.1 | 29.7 | 20.8
Foreign rate differential |  |  |  |  |  |  |  |  |  | (19.3) | (56.2) | (44.7)
U.S. tax on foreign earnings |  |  |  |  |  |  |  |  |  | 29.3 | 55.0 | 43.7
Research and development credit |  |  |  |  |  |  |  |  |  | (37.1) | (32.7) | (25.2)
Share-based compensation not benefited |  |  |  |  |  |  |  |  |  | 14.3 | 13.5 | 9.9
Unrecognized tax benefit related to share-based compensation |  |  |  |  |  |  |  |  |  | 39.3 | 0.0 | 0.0
Reversal of unrecognized tax benefits |  |  |  |  |  |  |  |  |  | (4.0) | (8.4) | (5.2)
Excess tax benefits related to share-based compensation |  | $ (21.3) | $ (47.9) | $ (31.6) | $ (65.4) | $ (33.7) | $ (28.8) | $ (11.3) | $ (72.7) | (166.2) | (146.5) | (116.2)
Deferred tax remeasurement due to Swiss Tax Reform | $ (51.3) |  |  |  |  |  |  |  |  | 0.0 | (51.3) | 0.0
Other |  |  |  |  |  |  |  |  |  | 7.3 | 1.8 | 2.7
Total income tax expense |  |  |  |  |  |  |  |  |  | $ 140.2 | $ 120.4 | $ 154.5

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- Definition Effective Income Tax Rate Reconciliation, Foreign Tax Reform, Amount + References No definition available. + Details
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- Definition Income Tax Reconciliation Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations + References No definition available. + Details
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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 740 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117330312&loc=d3e23163-113944 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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