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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Taxes [Line Items] |  |  |  |  |
Document Period End Date | Dec. 31, 2019 |  |  |  |
Operating loss carryforwards | $ 360.3 |  |  |  |
Unrecognized tax benefits | 1,439.1 | [1] | $ 1,342.8 | [1] | $ 1,180.4
Reasonably possible amount of unrecognized tax benefits decrease within the next 12 months - minimum | 980.0 |  |  |  |
Effective tax rate adjustment | 880.0 |  |  |  |
Accrued interest and penalties related to income tax matters | 174.4 |  | 152.0 |  |
Provision for income taxes, interest and penalties expense related to tax matters | $ 39.9 |  | 13.9 |  | 34.9
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability, Noncurrent |  |  |  |  | 1,200.0
Adjustments to Provisional Amounts Recorded at December 31, 2017 (Tax Cuts and Jobs Act of 2017) |  |  | $ 75.0 |  |
US net deferred tax liability remeasurement, amount |  |  |  |  | $ 500.0
Statutory U.S. federal income tax rate | 21.00% |  | 21.00% |  | 35.00%
Indefinite [Member] |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Operating loss carryforwards | $ 232.7 |  |  |  |
[1] | Of this amount, $1,285.3 million and $1,313.7 million are included in Long-term income taxes for 2019 and 2018, respectively, and $138.8 million and $12.5 million are included in Prepaid expenses and other current assets for 2019 and 2018, respectively, on the Consolidated Balance Sheet. The remainder is included in Deferred income taxes on the Consolidated Balance Sheet.

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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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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 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 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. + 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 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e32059-109318 Reference 3: 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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- Definition Amount of tax liability from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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