$LH
LABCORP HOLDINGS INC. Stock $lh

$lh Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000092014820000011 Filed on February 28, 2020

Income Statement

Concept	2019 Q4	2018 Q4	2018 Q3
Revenue	$2.953B	$2.788B	$2.831B
YoY Change	5.95%	1.56%	8.01%
Cost Of Revenue	$2.133B	$2.015B	$2.041B
YoY Change	5.84%	4.54%	11.11%
Gross Profit	$820.7M	$772.4M	$789.9M
YoY Change	6.25%	-5.47%	0.73%
Gross Profit Margin	27.79%	27.71%	27.9%
Selling, General & Admin	$380.5M	$396.9M	$381.8M
YoY Change	-4.13%	-4.89%	0.13%
% of Gross Profit	46.36%	51.39%	48.34%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$155.8M	$137.7M	$133.1M
YoY Change	13.14%	-5.03%	0.0%
% of Gross Profit	18.98%	17.83%	16.85%
Operating Expenses	$444.7M	$453.1M	$381.8M
YoY Change	-1.85%	-5.64%	0.13%
Operating Profit	$336.4M	$307.7M	$343.4M
YoY Change	9.33%	-6.93%	5.11%
Interest Expense	-$49.70M	-$51.80M	$59.40M
YoY Change	-4.05%	-21.28%	-0.83%
% of Operating Profit	-14.77%	-16.83%	17.3%
Other Income/Expense, Net	-$4.800M	-$41.40M	$156.2M
YoY Change	-88.41%	-3057.14%	-360.77%
Pretax Income	$292.9M	$214.5M	$499.6M
YoY Change	36.55%	-19.42%	87.26%
Income Tax	$65.60M	$384.4M	$180.6M
% Of Pretax Income	22.4%	179.21%	36.15%
Net Earnings	$227.1M	$157.9M	$318.8M
YoY Change	43.83%	-77.04%	85.89%
Net Earnings / Revenue	7.69%	5.66%	11.26%
Basic Earnings Per Share	$2.34	$1.58	$3.14
Diluted Earnings Per Share	$2.32	$1.56	$3.10
COMMON SHARES
Basic Shares Outstanding	97.10M shares	100.9M shares	101.6M shares
Diluted Shares Outstanding			102.7M shares

Balance Sheet

Concept	2019 Q4	2018 Q4	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$338.0M	$427.0M	$893.0M
YoY Change	-20.84%	34.7%	118.34%
Cash & Equivalents	$337.5M	$426.8M	$892.6M
Short-Term Investments
Other Short-Term Assets	$374.0M	$309.0M	$293.0M
YoY Change	21.04%	-9.91%	-34.89%
Inventory	$244.7M	$237.3M	$233.0M
Prepaid Expenses	$373.7M	$309.0M	$292.5M
Receivables	$1.544B	$1.468B	$1.536B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$2.981B	$2.835B	$3.274B
YoY Change	5.14%	3.72%	12.88%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.637B	$1.740B	$1.734B
YoY Change	51.5%	1.97%	-0.11%
Goodwill	$7.865B	$7.360B	$7.363B
YoY Change	6.86%	-0.55%	0.51%
Intangibles	$4.035B	$3.911B	$3.991B
YoY Change	3.16%	-6.12%	-9.61%
Long-Term Investments	$85.00M	$61.00M	$58.00M
YoY Change	39.34%	60900.0%	-10.77%
Other Assets	$435.4M	$276.0M	$239.4M
YoY Change	57.75%	26.9%	-3.39%
Total Long-Term Assets	$15.07B	$13.35B	$13.39B
YoY Change	12.85%	-4.23%	-2.93%
TOTAL ASSETS
Total Short-Term Assets	$2.981B	$2.835B	$3.274B
Total Long-Term Assets	$15.07B	$13.35B	$13.39B
Total Assets	$18.05B	$16.19B	$16.66B
YoY Change	11.5%	-2.93%	-0.18%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$632.3M	$634.6M	$497.5M
YoY Change	-0.36%	10.58%	-16.44%
Accrued Expenses	$942.4M	$870.0M	$901.5M
YoY Change	8.32%	9.67%	47.76%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$8.000M	$9.000M
YoY Change	-100.0%	-11.11%	-10.0%
Long-Term Debt Due	$424.0M	$10.00M	$409.0M
YoY Change	4140.0%	-97.56%	5012.5%
Total Short-Term Liabilities	$2.656B	$1.879B	$2.106B
YoY Change	41.35%	-14.04%	37.02%
LONG-TERM LIABILITIES
Long-Term Debt	$5.790B	$5.991B	$6.045B
YoY Change	-3.36%	-5.57%	-16.05%
Other Long-Term Liabilities	$383.2M	$334.0M	$343.0M
YoY Change	14.73%	-11.17%	-14.97%
Total Long-Term Liabilities	$6.173B	$6.325B	$6.388B
YoY Change	-2.4%	-17.46%	-15.99%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.656B	$1.879B	$2.106B
Total Long-Term Liabilities	$6.173B	$6.325B	$6.388B
Total Liabilities	$10.46B	$9.195B	$9.393B
YoY Change	13.75%	-6.63%	-10.87%
SHAREHOLDERS EQUITY
Retained Earnings	$7.904B	$7.157B	$6.922B
YoY Change	10.44%	15.5%	25.46%
Common Stock	$35.80M	$1.463B	$1.840B
YoY Change	-97.55%	-26.93%	-8.46%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$0.00	$1.108B	$1.106B
YoY Change	-100.0%	4.53%	4.45%
Treasury Stock Shares	0.000 shares	23.50M shares
Shareholders Equity	$7.644B	$7.048B	$7.248B
YoY Change
Total Liabilities & Shareholders Equity	$18.05B	$16.19B	$16.66B
YoY Change	11.5%	-2.93%	-0.18%

Cashflow Statement

Concept	2019 Q4	2018 Q4	2018 Q3
OPERATING ACTIVITIES
Net Income	$227.1M	$157.9M	$318.8M
YoY Change	43.83%	-77.04%	85.89%
Depreciation, Depletion And Amortization	$155.8M	$137.7M	$133.1M
YoY Change	13.14%	-5.03%	0.0%
Cash From Operating Activities	$569.8M	$486.4M	$251.9M
YoY Change	17.15%	-13.91%	-36.5%
INVESTING ACTIVITIES
Capital Expenditures	-$128.2M	-$122.2M	-$97.90M
YoY Change	4.91%	26.9%	30.01%
Acquisitions
YoY Change
Other Investing Activities	-$23.90M	-$24.70M	$647.8M
YoY Change	-3.24%	-69.88%	-152.32%
Cash From Investing Activities	-$152.1M	-$146.9M	$549.9M
YoY Change	3.54%	-17.61%	-141.87%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-449.4M	-802.9M	-128.9M
YoY Change	-44.03%	67.17%	-112.65%
NET CHANGE
Cash From Operating Activities	569.8M	486.4M	251.9M
Cash From Investing Activities	-152.1M	-146.9M	549.9M
Cash From Financing Activities	-449.4M	-802.9M	-128.9M
Net Change In Cash	-31.70M	-463.4M	672.9M
YoY Change	-93.16%	395.09%	561.0%
FREE CASH FLOW
Cash From Operating Activities	$569.8M	$486.4M	$251.9M
Capital Expenditures	-$128.2M	-$122.2M	-$97.90M
Free Cash Flow	$698.0M	$608.6M	$349.8M
YoY Change	14.69%	-7.97%	-25.89%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	328000000	USD
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CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000920148
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2017Q1	lh	Debt Covenant Requirement For Number Of Consecutive Fiscal Quarters DebtCovenantRequirementForNumberOfConsecutiveFiscalQuarters	4	Quarters
CY2017Q4	lh	Previously Recorded Litigation Reserve In Connection With False Claims Act Lawsuit PreviouslyRecordedLitigationReserveInConnectionWithFalseClaimsActLawsuit	15000000	USD
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CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P3Y
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	1-11353
CY2019	dei	Entity Registrant Name EntityRegistrantName	LABORATORY CORP OF AMERICA HOLDINGS
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	13-3757370
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	358 South Main Street
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Burlington,
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	NC
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	27215
CY2019	dei	City Area Code CityAreaCode	336
CY2019	dei	Local Phone Number LocalPhoneNumber	229-1127
CY2019	dei	Security12b Title Security12bTitle	Common Stock, $0.10 par value
CY2019	dei	Trading Symbol TradingSymbol	LH
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2017	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	286000000.0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-3700000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-17900000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	37800000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	90700000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-129400000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	248200000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	915600000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	754500000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1481100000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	1100000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	200000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	5800000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	914500000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	754300000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1475300000	USD
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	12100000	USD
CY2016Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2131700000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	4969000000.0	USD
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	1012700000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-581900000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	5518200000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	1227100000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	248200000	USD
CY2017	lh	Issuance Of Common Stock Under Employee Stock Plans IssuanceOfCommonStockUnderEmployeeStockPlans	73600000	USD
CY2017	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	47400000	USD
CY2017	lh	Conversion Of Zero Coupon Convertible Debt ConversionOfZeroCouponConvertibleDebt	12800000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	109700000	USD
CY2017	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	338100000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	6804100000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	883700000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-129400000	USD
CY2018	lh	Issuance Of Common Stock Under Employee Stock Plans IssuanceOfCommonStockUnderEmployeeStockPlans	69100000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	48000000.0	USD
CY2018	lh	Conversion Of Zero Coupon Convertible Debt ConversionOfZeroCouponConvertibleDebt	300000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	91600000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	700000000.0	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	6971400000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	823800000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	90700000	USD
CY2019	lh	Issuance Of Common Stock Under Employee Stock Plans IssuanceOfCommonStockUnderEmployeeStockPlans	64700000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	40600000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	107000000.0	USD
CY2019	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	450000000.0	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	7567000000.0	USD
CY2019	us-gaap	Profit Loss ProfitLoss	824900000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	883900000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	1232900000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	577200000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	552100000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	533200000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	107000000.0	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	91600000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	109700000	USD
CY2019	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	-13200000	USD
CY2018	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	184900000	USD
CY2017	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2019	lh	Depreciation And Amortization Of Leased Assets DepreciationAndAmortizationOfLeasedAssets	194100000	USD
CY2018	lh	Depreciation And Amortization Of Leased Assets DepreciationAndAmortizationOfLeasedAssets	0	USD
CY2017	lh	Depreciation And Amortization Of Leased Assets DepreciationAndAmortizationOfLeasedAssets	0	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-29200000	USD
CY2018	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-22200000	USD
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	525800000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-6500000	USD
CY2018	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	10800000	USD
CY2017	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	25800000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	64100000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-50200000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	13200000	USD
CY2019	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	59000000.0	USD
CY2018	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	81000000.0	USD
CY2017	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	-4000000.0	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	21900000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	18900000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	16400000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	42600000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	57900000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-19800000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-12800000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	43300000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	172300000	USD
CY2019	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	38100000	USD
CY2018	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-33800000	USD
CY2017	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	58600000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-132100000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	27800000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-102800000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1444700000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1305400000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1498100000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	400200000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	379800000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	312900000	USD
CY2019	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	27500000	USD
CY2018	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	22300000	USD
CY2017	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	36200000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	7700000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	50100000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	5500000	USD
CY2019	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	11200000	USD
CY2018	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	0	USD
CY2017	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	0	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2018	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	658200000	USD
CY2017	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2019	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	1700000	USD
CY2018	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	18300000	USD
CY2017	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	0	USD
CY2019	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0	USD
CY2018	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0	USD
CY2017	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	2500000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	876000000.0	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	117800000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1882600000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1283100000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	206700000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2228700000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1050000000.0	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1200000000.0	USD
CY2019	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	850000000.0	USD
CY2018	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	0	USD
CY2017	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	750000000.0	USD
CY2019	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	1002000000.0	USD
CY2018	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	295000000.0	USD
CY2017	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	493000000.0	USD
CY2019	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	495000000.0	USD
CY2018	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	467200000	USD
CY2017	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	1392200000	USD
CY2019	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	495000000.0	USD
CY2018	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	467200000	USD
CY2017	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	1392200000	USD
CY2019	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	687900000	USD
CY2018	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	400000000.0	USD
CY2017	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	500100000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	11600000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	15300000	USD
CY2019	lh	Other Financing Cash Flows OtherFinancingCashFlows	25300000	USD
CY2018	lh	Other Financing Cash Flows OtherFinancingCashFlows	16000000.0	USD
CY2017	lh	Other Financing Cash Flows OtherFinancingCashFlows	36500000	USD
CY2019	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-40600000	USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-48000000.0	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-47400000	USD
CY2019	lh	Net Proceeds From Issuance Of Stock To Employees NetProceedsFromIssuanceOfStockToEmployees	64700000	USD
CY2018	lh	Net Proceeds From Issuance Of Stock To Employees NetProceedsFromIssuanceOfStockToEmployees	69100000	USD
CY2017	lh	Net Proceeds From Issuance Of Stock To Employees NetProceedsFromIssuanceOfStockToEmployees	73600000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	450000000.0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	700000000.0	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	338100000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-252700000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1389900000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	593200000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	1800000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-12000000.0	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	20500000	USD
CY2019	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-89300000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	110200000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-116900000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	426800000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	316600000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	433600000	USD
CY2019	lh	Cashincludedinassetsheldforsale Cashincludedinassetsheldforsale	0	USD
CY2018	lh	Cashincludedinassetsheldforsale Cashincludedinassetsheldforsale	0	USD
CY2017	lh	Cashincludedinassetsheldforsale Cashincludedinassetsheldforsale	100000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	337500000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	426800000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	316600000	USD
CY2019	lh	Cost Method Investments Maximum Ownership Percentage CostMethodInvestmentsMaximumOwnershipPercentage	0.20
CY2019	lh	Greater Than Lease Term Months Requiredto Record Rightof Use Assetand Lease Liability GreaterThanLeaseTermMonthsRequiredtoRecordRightofUseAssetandLeaseLiability	P12Y
CY2019	lh	Less Than Initial Lease Term Months For Short Term Lease Exemptionand Recordingon Balance Sheet LessThanInitialLeaseTermMonthsForShortTermLeaseExemptionandRecordingonBalanceSheet	P12Y
CY2019	lh	Less Than Initial Lease Term Months For Short Term Lease Exemptionand Recordingon Balance Sheet LessThanInitialLeaseTermMonthsForShortTermLeaseExemptionandRecordingonBalanceSheet	P12Y
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;padding-bottom:4px;padding-top:9px;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates</span></div><div style="line-height:120%;padding-bottom:9px;padding-top:4px;text-align:justify;text-indent:20px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with generally accepted accounting principles requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported periods. Significant estimates include implicit price concessions, revenue estimates, the allowances for doubtful accounts, deferred tax assets, fair values of acquired assets and assumed liabilities in business combinations, amortization lives for acquired intangible assets, and accruals for self-insurance reserves, litigation reserves and pensions. The allowance for doubtful accounts is determined based on historical collections trends, the aging of accounts, current economic conditions and regulatory changes. Actual results could differ from those estimates.</span></div>
CY2019Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	335000000.0	USD
CY2018Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	423000000.0	USD
CY2019Q4	lh	Concentration Risk Accounts Receivable Medicare And Medicaid ConcentrationRiskAccountsReceivableMedicareAndMedicaid	81400000	USD
CY2018Q4	lh	Concentration Risk Accounts Receivable Medicare And Medicaid ConcentrationRiskAccountsReceivableMedicareAndMedicaid	88800000	USD
CY2019Q4	lh	Accountsreceivablefrom Ontariogovernmentsponsoredhealthcareplan AccountsreceivablefromOntariogovernmentsponsoredhealthcareplan	3200000	USD
CY2018Q4	lh	Accountsreceivablefrom Ontariogovernmentsponsoredhealthcareplan AccountsreceivablefromOntariogovernmentsponsoredhealthcareplan	500000	USD
CY2019Q4	lh	Percentofgrossaccountsreceivableduefrompatients Percentofgrossaccountsreceivableduefrompatients	0.211
CY2018Q4	lh	Percentofgrossaccountsreceivableduefrompatients Percentofgrossaccountsreceivableduefrompatients	0.215
CY2019	us-gaap	Net Income Loss NetIncomeLoss	823800000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	97900000	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.42
CY2018	us-gaap	Net Income Loss NetIncomeLoss	883700000	USD
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	101400000	shares
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.71
CY2017	us-gaap	Net Income Loss NetIncomeLoss	1227100000	USD
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	102400000	shares
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	11.99
CY2019	lh	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	700000	shares
CY2018	lh	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	1200000	shares
CY2017	lh	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	1400000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	100000	shares
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	823800000	USD
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	98600000	shares
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.35
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	883700000	USD
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	102600000	shares
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.61
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1227100000	USD
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	103900000	shares
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	11.81
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	200000	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100000	shares
CY2019Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	228300000	USD
CY2018Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	200100000	USD
CY2019Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	16400000	USD
CY2018Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	37200000	USD
CY2019	lh	Propertyplantandequipmentusefullifesoftwareminimum Propertyplantandequipmentusefullifesoftwareminimum	3	Y
CY2019	lh	Propertyplantandequipmentusefullifesoftwaremaximum Propertyplantandequipmentusefullifesoftwaremaximum	10	Y
CY2019	lh	Property Plant And Equipment Useful Life Software Average PropertyPlantAndEquipmentUsefulLifeSoftwareAverage	5	Y
CY2019Q4	lh	Percentage Fair Valueof Goodwill Exceeded Carrying Value PercentageFairValueofGoodwillExceededCarryingValue	0.10
CY2019Q4	lh	Valueof Reporting Units Goodwill ValueofReportingUnitsGoodwill	2200000000	USD
CY2019Q4	lh	Percentage Changein Discount Rate Usedto Calculate Fair Valueof Goodwill PercentageChangeinDiscountRateUsedtoCalculateFairValueofGoodwill	0.01
CY2019Q4	lh	Percentage Fair Value Exceeds Carrying Valuewitha1 Changein Discount Rate Usedto Calculate Fair Valueof Goodwill PercentageFairValueExceedsCarryingValuewitha1ChangeinDiscountRateUsedtoCalculateFairValueofGoodwill	0.01
CY2019Q4	lh	Income Tax Benefit Minimum Certainty Percentage IncomeTaxBenefitMinimumCertaintyPercentage	0.50
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	0	USD
CY2019	us-gaap	Reclassifications Reclassifications	<div style="line-height:120%;padding-bottom:9px;padding-top:9px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Reclassifications and Revisions</span></div><span style="font-family:inherit;font-size:10pt;">In conjunction with the adoption of the new lease standard, the Company reclassified the capital lease asset balance of </span><span style="font-family:inherit;font-size:10pt;text-align:right;vertical-align:bottom;"><span>$44.4</span></span><span style="font-family:inherit;font-size:10pt;"> at December 31, 2018 from Property, plant and equipment, net to Other assets.</span>
CY2018	us-gaap	Prior Period Reclassification Adjustment PriorPeriodReclassificationAdjustment	44400000	USD
CY2019	lh	Percentof Revenue Contributed PercentofRevenueContributed	1
CY2018	lh	Percentof Revenue Contributed PercentofRevenueContributed	1
CY2017	lh	Percentof Revenue Contributed PercentofRevenueContributed	1
CY2019	lh	Sales Commission Amortization Period Minimum SalesCommissionAmortizationPeriodMinimum	P12M
CY2019	lh	Sales Commission Amortization Period Maximum SalesCommissionAmortizationPeriodMaximum	P57M
CY2019Q4	us-gaap	Accrued Sales Commission Current And Noncurrent AccruedSalesCommissionCurrentAndNoncurrent	28600000	USD
CY2018Q4	us-gaap	Accrued Sales Commission Current And Noncurrent AccruedSalesCommissionCurrentAndNoncurrent	24200000	USD
CY2019Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	14900000	USD
CY2018Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	12900000	USD
CY2019Q4	us-gaap	Deferred Sales Commission DeferredSalesCommission	43500000	USD
CY2018Q4	us-gaap	Deferred Sales Commission DeferredSalesCommission	37100000	USD
CY2019	us-gaap	Amortization Of Deferred Sales Commissions AmortizationOfDeferredSalesCommissions	21200000	USD
CY2018	us-gaap	Amortization Of Deferred Sales Commissions AmortizationOfDeferredSalesCommissions	16900000	USD
CY2017	us-gaap	Amortization Of Deferred Sales Commissions AmortizationOfDeferredSalesCommissions	14300000	USD
CY2019	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	8700000	USD
CY2018	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	4400000	USD
CY2017	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	300000	USD
CY2019Q4	us-gaap	Accounts Receivable Billed For Long Term Contracts Or Programs AccountsReceivableBilledForLongTermContractsOrPrograms	771100000	USD
CY2018Q4	us-gaap	Accounts Receivable Billed For Long Term Contracts Or Programs AccountsReceivableBilledForLongTermContractsOrPrograms	693600000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Gross ContractWithCustomerAssetGross	483700000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Gross ContractWithCustomerAssetGross	396900000	USD
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	449200000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	354100000	USD
CY2019	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	250200000	USD
CY2018	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	204000000.0	USD
CY2019Q4	lh	Percentofremainingperformanceobligationsrecognizedasrevenueinnextyear Percentofremainingperformanceobligationsrecognizedasrevenueinnextyear	0.350
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	4520800000	USD
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	3784700000	USD
CY2019	lh	Long Term Contracts Duration Minimum LongTermContractsDurationMinimum	P1Y
CY2019	lh	Long Term Contracts Duration Maximum LongTermContractsDurationMaximum	P8Y
CY2019	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	88900000	USD
CY2018	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	21000000.0	USD
CY2019Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	110000000.0	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-12200000	USD
CY2019Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	110000000.0	USD
CY2019Q2	lh	Totalacquisitionconsiderationcashstocknotesetc. Totalacquisitionconsiderationcashstocknotesetc.	711000000.0	USD
CY2019Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	0	USD
CY2019Q2	lh	Totalacquisitionconsiderationcashstocknotesetc. Totalacquisitionconsiderationcashstocknotesetc.	711000000.0	USD
CY2019	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P15Y
CY2019	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	11742500000	USD
CY2018	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	11738500000	USD
CY2019	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	831400000	USD
CY2018	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	906600000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	117800000	USD
CY2018	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	67800000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	70500000	USD
CY2018	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	7600000	USD
CY2017	us-gaap	Disposal Group Including Discontinued Operation Operating Income Loss DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss	12900000	USD
CY2019	lh	Net Restructuring Charges NetRestructuringCharges	54600000	USD
CY2019	us-gaap	Severance Costs1 SeveranceCosts1	32900000	USD
CY2019	us-gaap	Business Exit Costs1 BusinessExitCosts1	24900000	USD
CY2019	lh	Employee Severance Benefits Related Restructuring Reserve Accrual Adjustment EmployeeSeveranceBenefitsRelatedRestructuringReserveAccrualAdjustment	1700000	USD
CY2019	lh	Facility Related Restructuring Reserve Accrual Adjustment FacilityRelatedRestructuringReserveAccrualAdjustment	1500000	USD
CY2018	lh	Net Restructuring Charges NetRestructuringCharges	48100000	USD
CY2018	us-gaap	Severance Costs1 SeveranceCosts1	40300000	USD
CY2018	us-gaap	Business Exit Costs1 BusinessExitCosts1	11800000	USD
CY2018	lh	Employee Severance Benefits Related Restructuring Reserve Accrual Adjustment EmployeeSeveranceBenefitsRelatedRestructuringReserveAccrualAdjustment	2000000.0	USD
CY2018	lh	Facility Related Restructuring Reserve Accrual Adjustment FacilityRelatedRestructuringReserveAccrualAdjustment	2000000.0	USD
CY2017	lh	Net Restructuring Charges NetRestructuringCharges	70900000	USD
CY2017	us-gaap	Severance Costs1 SeveranceCosts1	36100000	USD
CY2017	us-gaap	Business Exit Costs1 BusinessExitCosts1	18800000	USD
CY2017	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	20900000	USD
CY2017	lh	Employee Severance Benefits Related Restructuring Reserve Accrual Adjustment EmployeeSeveranceBenefitsRelatedRestructuringReserveAccrualAdjustment	500000	USD
CY2017	lh	Facility Related Restructuring Reserve Accrual Adjustment FacilityRelatedRestructuringReserveAccrualAdjustment	4400000	USD
CY2017Q4	us-gaap	Restructuring Reserve RestructuringReserve	54700000	USD
CY2018	us-gaap	Restructuring Charges RestructuringCharges	52100000	USD
CY2018	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	4000000.0	USD
CY2018	lh	Restructuring Reserve Settled With Cash And Other Adjustment RestructuringReserveSettledWithCashAndOtherAdjustment	59200000	USD
CY2018Q4	us-gaap	Restructuring Reserve RestructuringReserve	43600000	USD
CY2019	lh	Asc842 Lease Adoption Implementation Impact ASC842LeaseAdoptionImplementationImpact	32800000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	33100000	USD
CY2019	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	24700000	USD
CY2019	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	3200000	USD
CY2019	lh	Restructuring Reserve Settled With Cash And Other Adjustment RestructuringReserveSettledWithCashAndOtherAdjustment	52000000.0	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	13400000	USD
CY2019Q4	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	9800000	USD
CY2019Q4	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	3600000	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	13400000	USD
CY2019	lh	Numberofyearsrestructuringliabilitiesexpectedtobepaidoutover Numberofyearsrestructuringliabilitiesexpectedtobepaidoutover	P4Y4M24D
CY2019Q4	us-gaap	Lessee Operating Lease Term Of Contract LesseeOperatingLeaseTermOfContract	P15Y
CY2019Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P15Y
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	224000000.0	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	11100000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	6700000	USD
CY2019	us-gaap	Lease Cost LeaseCost	17800000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	227300000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	6700000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	8900000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	132600000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	200000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	732800000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	206500000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	596600000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	803100000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	87700000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	8400000	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	91100000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	99500000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y7M6D
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P15Y6M
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.041
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.052
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	206500000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	15800000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	164800000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	13900000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	121000000.0	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	12600000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	88200000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	12400000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	67600000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	10900000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	289900000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	96800000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	938000000.0	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	162400000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	134900000	USD
CY2019Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	62900000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	206500000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	8400000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	596600000	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	91100000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	10600000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	20800000	USD
CY2019Q4	lh	Leasesnotyetcommenced Leasesnotyetcommenced	3
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	191100000	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	8600000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	145400000	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	8000000.0	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	107000000.0	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	6700000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	80900000	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	6000000.0	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	61500000	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	6500000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	155600000	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	23100000	USD
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	393100000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	358700000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	313800000	USD
CY2019Q4	lh	Canadian Licenses Alberta Canada CanadianLicensesAlbertaCanada	34000000.0	USD
CY2019Q4	lh	Ah Stransferto Canadian Jv AHStransfertoCanadianJV	50000000.0
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	19000000.0	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	15700000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1543900000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	1467900000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4565300000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3478200000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1928700000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1737900000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2636600000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1740300000	USD
CY2019	lh	Software Depreciation SoftwareDepreciation	90400000	USD
CY2018	lh	Software Depreciation SoftwareDepreciation	92700000	USD
CY2017	lh	Software Depreciation SoftwareDepreciation	85600000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	7360300000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	7400900000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	494500000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	70500000	USD
CY2019	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	-12600000	USD
CY2018	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	-34900000	USD
CY2019	us-gaap	Goodwill Translation And Purchase Accounting Adjustments GoodwillTranslationAndPurchaseAccountingAdjustments	22800000	USD
CY2018	us-gaap	Goodwill Translation And Purchase Accounting Adjustments GoodwillTranslationAndPurchaseAccountingAdjustments	-76200000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	7865000000.0	USD
CY2018Q4	us-gaap	Goodwill Goodwill	7360300000	USD
CY2019Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	5885600000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1851100000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	4034500000	USD
CY2018Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	5515900000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1604800000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3911100000	USD
CY2019	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	325900000	USD
CY2019	us-gaap	Acquired Finite Lived Intangible Assets Weighted Average Useful Life AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife	P13Y1M6D
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	243200000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	231700000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	216500000	USD
CY2019	lh	Adjustmentstointangiblesthroughamortizationexpense Adjustmentstointangiblesthroughamortizationexpense	400000	USD
CY2018	lh	Adjustmentstointangiblesthroughamortizationexpense Adjustmentstointangiblesthroughamortizationexpense	4500000	USD
CY2017	lh	Adjustmentstointangiblesthroughamortizationexpense Adjustmentstointangiblesthroughamortizationexpense	3000000.0	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	243200000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	234000000.0	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	228000000.0	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	224800000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	219600000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	2315700000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	474600000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	427600000	USD
CY2019Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	156700000	USD
CY2018Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	124800000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	311100000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	317600000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	942400000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	870000000.0	USD
CY2019Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	188400000	USD
CY2018Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	125800000	USD
CY2019Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	76700000	USD
CY2018Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	64200000	USD
CY2019Q4	lh	Other Liabilities Noncurrent Other OtherLiabilitiesNoncurrentOther	118100000	USD
CY2018Q4	lh	Other Liabilities Noncurrent Other OtherLiabilitiesNoncurrentOther	144000000.0	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	383200000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	334000000.0	USD
CY2019Q4	us-gaap	Convertible Subordinated Debt Current ConvertibleSubordinatedDebtCurrent	0	USD
CY2018Q4	us-gaap	Convertible Subordinated Debt Current ConvertibleSubordinatedDebtCurrent	8700000	USD
CY2019Q4	lh	A4.625 Seniornotesdue2020 A4.625Seniornotesdue2020	413700000	USD
CY2018Q4	lh	A4.625 Seniornotesdue2020 A4.625Seniornotesdue2020	0	USD
CY2019Q4	lh	Shorttermdebtissuancecosts Shorttermdebtissuancecosts	700000	USD
CY2018Q4	lh	Shorttermdebtissuancecosts Shorttermdebtissuancecosts	500000	USD
CY2019Q4	us-gaap	Notes Payable Current NotesPayableCurrent	2200000	USD
CY2018Q4	us-gaap	Notes Payable Current NotesPayableCurrent	1800000	USD
CY2019Q4	us-gaap	Debt Current DebtCurrent	415200000	USD
CY2018Q4	us-gaap	Debt Current DebtCurrent	10000000.0	USD
CY2019Q4	lh	A4.625 Senior Notes Long Term Portion A4.625SeniorNotesLongTermPortion	0	USD
CY2018Q4	lh	A4.625 Senior Notes Long Term Portion A4.625SeniorNotesLongTermPortion	597000000.0	USD
CY2019Q4	lh	A2.625 Senior Notesdue2020 A2.625SeniorNotesdue2020	0	USD
CY2018Q4	lh	A2.625 Senior Notesdue2020 A2.625SeniorNotesdue2020	500000000.0	USD
CY2019Q4	lh	A3.75 Seniornotesdue2022 A3.75Seniornotesdue2022	500000000.0	USD
CY2018Q4	lh	A3.75 Seniornotesdue2022 A3.75Seniornotesdue2022	500000000.0	USD
CY2019Q4	lh	A3.20 Seniornotesdue2022 A3.20Seniornotesdue2022	500000000.0	USD
CY2018Q4	lh	A3.20 Seniornotesdue2022 A3.20Seniornotesdue2022	500000000.0	USD
CY2019Q4	lh	A4.00 Seniornotesdue2023 A4.00Seniornotesdue2023	300000000.0	USD
CY2018Q4	lh	A4.00 Seniornotesdue2023 A4.00Seniornotesdue2023	300000000.0	USD
CY2019Q4	lh	Seniornotesdue2024 Seniornotesdue2024	600000000.0	USD
CY2018Q4	lh	Seniornotesdue2024 Seniornotesdue2024	600000000.0	USD
CY2019Q4	lh	A3.60 Seniornotesdue2025 A3.60Seniornotesdue2025	1000000000.0	USD
CY2018Q4	lh	A3.60 Seniornotesdue2025 A3.60Seniornotesdue2025	1000000000.0	USD
CY2019Q4	lh	Seniornotesdue2027 Seniornotesdue2027	600000000.0	USD
CY2018Q4	lh	Seniornotesdue2027 Seniornotesdue2027	600000000.0	USD
CY2019Q4	lh	A4.70 Seniornotesdue2045 A4.70Seniornotesdue2045	900000000.0	USD
CY2018Q4	lh	A4.70 Seniornotesdue2045 A4.70Seniornotesdue2045	900000000.0	USD
CY2019Q4	lh	A2.30seniornotesdue2024 A2.30seniornotesdue2024	400000000.0	USD
CY2018Q4	lh	A2.30seniornotesdue2024 A2.30seniornotesdue2024	0	USD
CY2019Q4	lh	A2.95seniornotesdue2029 A2.95seniornotesdue2029	650000000.0	USD
CY2018Q4	lh	A2.95seniornotesdue2029 A2.95seniornotesdue2029	0	USD
CY2019Q4	lh	A2019 Term Loan A2019TermLoan	375000000.0	USD
CY2018Q4	lh	A2019 Term Loan A2019TermLoan	0	USD
CY2019Q4	lh	A2017 Termloan A2017Termloan	0	USD
CY2018Q4	lh	A2017 Termloan A2017Termloan	527100000	USD
CY2019Q4	lh	Longtermdebtissuancecosts Longtermdebtissuancecosts	42200000	USD
CY2018Q4	lh	Longtermdebtissuancecosts Longtermdebtissuancecosts	40300000	USD
CY2019Q4	us-gaap	Long Term Notes Payable LongTermNotesPayable	7000000.0	USD
CY2018Q4	us-gaap	Long Term Notes Payable LongTermNotesPayable	7100000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5789800000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5990900000	USD
CY2019Q2	lh	A2019 Term Loan A2019TermLoan	850000000.0	USD
CY2017Q3	lh	A2017 Termloan A2017Termloan	750000000.0	USD
CY2014Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	1000000000.0	USD
CY2014Q4	lh	Credit Facility Optionto Increase CreditFacilityOptiontoIncrease	350000000.0	USD
CY2014Q4	lh	Credit Facility Maximum Swing Line Borrowings CreditFacilityMaximumSwingLineBorrowings	100000000.0	USD
CY2019Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	923700000	USD
CY2019Q4	us-gaap	Senior Long Term Notes SeniorLongTermNotes	1050000000.0	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	4000000.0	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	415900000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal In Year Two LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearTwo	375000000.0	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal In Year Three LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearThree	1000000000.0	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal In Year Four LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFour	300000000.0	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal In Year Five LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFive	1000000000.0	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal After Year Five LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalAfterYearFive	3157000000.0	USD
CY2019Q4	lh	Longtermdebtfutureminimumpaymentsinterestincludedinpayments Longtermdebtfutureminimumpaymentsinterestincludedinpayments	6247900000	USD
CY2019Q4	lh	Total Shortand Long Term Debt Issuance Costs TotalShortandLongTermDebtIssuanceCosts	42900000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	6205000000.0	USD
CY2019Q4	us-gaap	Debt Current DebtCurrent	415200000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5789800000	USD
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	265000000.0	shares
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	97200000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	122400000	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	0	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	23500000	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	97200000	shares
CY2019	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification	1600000	USD
CY2018	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification	10200000	USD
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	98900000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	30000000.0	shares
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.10
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	122400000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	125100000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	125600000	shares
CY2019	lh	Commons Stock Issued During Period Shares Employee Stock Plans CommonsStockIssuedDuringPeriodSharesEmployeeStockPlans	1200000	shares
CY2018	lh	Commons Stock Issued During Period Shares Employee Stock Plans CommonsStockIssuedDuringPeriodSharesEmployeeStockPlans	1600000	shares
CY2017	lh	Commons Stock Issued During Period Shares Employee Stock Plans CommonsStockIssuedDuringPeriodSharesEmployeeStockPlans	1700000	shares
CY2019	us-gaap	Stock Issued During Period Shares Conversion Of Convertible Securities StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	100000	shares
CY2018	us-gaap	Stock Issued During Period Shares Conversion Of Convertible Securities StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	0	shares
CY2017	us-gaap	Stock Issued During Period Shares Conversion Of Convertible Securities StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	300000	shares
CY2019	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	23600000	shares
CY2018	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	0	shares
CY2017	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	0	shares
CY2019	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	2900000	shares
CY2018	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	4300000	shares
CY2017	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	2500000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	97200000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	122400000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	125100000	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	23500000	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	23200000	shares
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	22900000	shares
CY2019	us-gaap	Stock Issued During Period Shares Restricted Stock Award Forfeited StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited	100000	shares
CY2018	us-gaap	Stock Issued During Period Shares Restricted Stock Award Forfeited StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited	300000	shares
CY2017	us-gaap	Stock Issued During Period Shares Restricted Stock Award Forfeited StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited	300000	shares
CY2019	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	23600000	shares
CY2018	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	0	shares
CY2017	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	0	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	0	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	23500000	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	23200000	shares
CY2019Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	1250000000.0	USD
CY2019	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	2900000	shares
CY2019	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	154.94
CY2019Q4	lh	Valueof Common Stock Repurchased ValueofCommonStockRepurchased	450000000.0	USD
CY2019Q4	lh	Valueof Common Stock Repurchased Priorto New Plan ValueofCommonStockRepurchasedPriortoNewPlan	100000000.0	USD
CY2019Q4	lh	Common Stock Repurchase Authorization Outstanding CommonStockRepurchaseAuthorizationOutstanding	900000000.0	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-240700000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	93000000.0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-176600000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	29400000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	-147200000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Finalization Of Pension And Non Pension Postretirement Plan Valuation Before Tax OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax	-7500000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Finalization Of Pension And Non Pension Postretirement Plan Valuation Before Tax OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax	-7500000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	7400000	USD
CY2018	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	7400000	USD
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	-27500000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-9600000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-17900000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-389800000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	73300000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	104400000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	-22500000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	81900000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	5100000	USD
CY2019	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	5100000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	3700000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-3700000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-285400000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	87000000.0	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	784400000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	937700000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	838800000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	320500000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	330600000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	238700000	USD
CY2019	lh	Income Loss From Continuing Operations Before Income Taxes And Minority Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest	1104900000	USD
CY2018	lh	Income Loss From Continuing Operations Before Income Taxes And Minority Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest	1268300000	USD
CY2017	lh	Income Loss From Continuing Operations Before Income Taxes And Minority Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest	1077500000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	126700000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	225800000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	300800000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	40200000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	61200000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	32900000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	83900000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	64300000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	53000000.0	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	250800000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	351300000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	386700000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	38200000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2500000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-547800000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2500000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	30000000.0	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	11400000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-11500000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	5600000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-5700000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	29200000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	33100000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-542100000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	280000000.0	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	384400000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-155400000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1339800000	USD
CY2017	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification	16900000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	30000000.0	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	5900000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	2000000.0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.032
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.034
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.026
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.001
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.003
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.037
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges	0.007
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges	0.019
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges	0.006
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	0.001
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	0.008
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	0.016
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.024
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.369
CY2019	lh	Effectiveincometaxratereconciliationdeferredtaxesonunremittedearnings Effectiveincometaxratereconciliationdeferredtaxesonunremittedearnings	0
CY2018	lh	Effectiveincometaxratereconciliationdeferredtaxesonunremittedearnings Effectiveincometaxratereconciliationdeferredtaxesonunremittedearnings	0
CY2017	lh	Effectiveincometaxratereconciliationdeferredtaxesonunremittedearnings Effectiveincometaxratereconciliationdeferredtaxesonunremittedearnings	0.166
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0.012
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0.053
CY2019	lh	Effective Income Tax Rate Reconciliation Gilti Impact Percent EffectiveIncomeTaxRateReconciliationGILTIImpactPercent	0.011
CY2018	lh	Effective Income Tax Rate Reconciliation Gilti Impact Percent EffectiveIncomeTaxRateReconciliationGILTIImpactPercent	0.010
CY2017	lh	Effective Income Tax Rate Reconciliation Gilti Impact Percent EffectiveIncomeTaxRateReconciliationGILTIImpactPercent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.005
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.005
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.009
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.253
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.303
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.144
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	519000000.0	USD
CY2018	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	45000000.0	USD
CY2018	us-gaap	Foreign Earnings Repatriated ForeignEarningsRepatriated	14800000	USD
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit	30100000	USD
CY2018	lh	Nettaximpactof Tcja NettaximpactofTCJA	474000000.0	USD
CY2019	lh	Nettaximpactof Gilti NettaximpactofGILTI	11800000	USD
CY2018	lh	Nettaximpactof Gilti NettaximpactofGILTI	13000000.0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	16900000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	13900000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	105100000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	104400000	USD
CY2019Q4	lh	Deferred Tax Asset Right Of Use Asset DeferredTaxAssetRightOfUseAsset	191400000	USD
CY2018Q4	lh	Deferred Tax Asset Right Of Use Asset DeferredTaxAssetRightOfUseAsset	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Restructuring Charges DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges	9900000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Restructuring Charges DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges	16800000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	207100000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	209000000.0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	62900000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	34500000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	593300000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	378600000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	145400000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	156900000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	447900000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	221700000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	177300000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	0	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	910500000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	891800000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	194600000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	182800000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	57400000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	31400000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1106000000.0	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	891900000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	884300000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	156900000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	153500000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	31300000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	0	USD
CY2018	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	3400000	USD
CY2017	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	11500000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	11500000	USD
CY2018	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	0	USD
CY2017	us-gaap	Valuation Allowances And Reserves Adjustments ValuationAllowancesAndReservesAdjustments	-110700000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	145400000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	156900000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	153500000	USD
CY2019Q4	lh	Federal Tax Loss Carryovers FederalTaxLossCarryovers	209500000	USD
CY2019Q4	lh	Federal Tax Loss Carryforwards Indefinite FederalTaxLossCarryforwardsIndefinite	6100000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Adjustments ValuationAllowancesAndReservesAdjustments	3900000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	594100000	USD
CY2019Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	311400000	USD
CY2019Q4	lh	Federaland State Attribute Carryforwards FederalandStateAttributeCarryforwards	252500000	USD
CY2019	lh	Federaland State Attribute Carryforward Valuation Allowance FederalandStateAttributeCarryforwardValuationAllowance	209600000	USD
CY2019Q4	lh	Foreign Tax Loss Carryovers ForeignTaxLossCarryovers	116900000	USD
CY2019	lh	Foreign Tax Loss Carryover Valuation Allowance ForeignTaxLossCarryoverValuationAllowance	26700000	USD
CY2019Q4	lh	Foreign Tax Loss Carryovers Expirein2034 ForeignTaxLossCarryoversExpirein2034	443800000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	6900000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	156900000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	145400000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	31700000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18000000.0	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	5500000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	8700000	USD
CY2019	us-gaap	Income Tax Examination Penalties Expense IncomeTaxExaminationPenaltiesExpense	2000000.0	USD
CY2018	us-gaap	Income Tax Examination Penalties Expense IncomeTaxExaminationPenaltiesExpense	1800000	USD
CY2017	us-gaap	Income Tax Examination Penalties Expense IncomeTaxExaminationPenaltiesExpense	2300000	USD
CY2019	lh	Reversalof Accrued Income Tax Penalties And Interest ReversalofAccruedIncomeTaxPenaltiesAndInterest	5800000	USD
CY2018	lh	Reversalof Accrued Income Tax Penalties And Interest ReversalofAccruedIncomeTaxPenaltiesAndInterest	500000	USD
CY2017	lh	Reversalof Accrued Income Tax Penalties And Interest ReversalofAccruedIncomeTaxPenaltiesAndInterest	4300000	USD
CY2019	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	200000	USD
CY2019Q4	lh	Accrued Tax Interest Addedfrom Acquisition AccruedTaxInterestAddedfromAcquisition	800000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18000000.0	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	19500000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18400000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	10300000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3100000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	7300000	USD
CY2019	lh	Unrecognized Tax Benefits Increasein Reserve From Acquisition UnrecognizedTaxBenefitsIncreaseinReserveFromAcquisition	8400000	USD
CY2018	lh	Unrecognized Tax Benefits Increasein Reserve From Acquisition UnrecognizedTaxBenefitsIncreaseinReserveFromAcquisition	0	USD
CY2017	lh	Unrecognized Tax Benefits Increasein Reserve From Acquisition UnrecognizedTaxBenefitsIncreaseinReserveFromAcquisition	0	USD
CY2019	lh	Unrecognized Tax Benefits Increases Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions	800000	USD
CY2018	lh	Unrecognized Tax Benefits Increases Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions	4600000	USD
CY2017	lh	Unrecognized Tax Benefits Increases Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	4200000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	6200000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	31700000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18000000.0	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	19500000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	31700000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	18000000.0	USD
CY2019Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	601400000	USD
CY2018Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	490100000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	9800000	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	6300000	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P3Y
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	24500000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	27600000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	37500000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	43900000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	6900000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	9400000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	13400000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	24500000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	44100000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	34800000	USD
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	39.85
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	30.39
CY2019Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	34.40
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	44.37
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2019Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.016
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.016
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.025
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.027
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.208
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.208
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.200
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.189
CY2019	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	5900000	USD
CY2018	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	3500000	USD
CY2017	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	900000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Rights ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights	one third increments beginning on the first anniversary of the grant
CY2019	lh	Share Based Compensation Arrangement Performance Share Awards Vesting Conditions ShareBasedCompensationArrangementPerformanceShareAwardsVestingConditions	Performance share awards are subject to certain earnings per share, revenue and total shareholder return targets
CY2019	lh	Restricted Stock Performance Shares Expense RestrictedStockPerformanceSharesExpense	91200000	USD
CY2018	lh	Restricted Stock Performance Shares Expense RestrictedStockPerformanceSharesExpense	80100000	USD
CY2017	lh	Restricted Stock Performance Shares Expense RestrictedStockPerformanceSharesExpense	100800000	USD
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	112200000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y2M12D
CY2019Q4	lh	Employee Stock Purchase Plan Number Of Authorized Shares EmployeeStockPurchasePlanNumberOfAuthorizedShares	1800000	shares
CY2019	lh	Employee Stock Purchase Plan Percent Of Market Price EmployeeStockPurchasePlanPercentOfMarketPrice	0.85
CY2019	lh	Employee Stock Purchase Plan Number Of Shares Purchased EmployeeStockPurchasePlanNumberOfSharesPurchased	200000	shares
CY2019	lh	Employee Stock Purchase Plan Expense EmployeeStockPurchasePlanExpense	9900000	USD
CY2018	lh	Employee Stock Purchase Plan Expense EmployeeStockPurchasePlanExpense	8000000.0	USD
CY2017	lh	Employee Stock Purchase Plan Expense EmployeeStockPurchasePlanExpense	8000000.0	USD
CY2019	lh	Employee Stock Purchase Plan Fair Value Employee Purchase Right EmployeeStockPurchasePlanFairValueEmployeePurchaseRight	31.84
CY2018	lh	Employee Stock Purchase Plan Fair Value Employee Purchase Right EmployeeStockPurchasePlanFairValueEmployeePurchaseRight	34.43
CY2017	lh	Employee Stock Purchase Plan Fair Value Employee Purchase Right EmployeeStockPurchasePlanFairValueEmployeePurchaseRight	31.54
CY2019Q4	lh	Numberof Additional Parties Not Providing Consent NumberofAdditionalPartiesNotProvidingConsent	40
CY2019Q4	lh	Damages Per Violation DamagesPerViolation	500.0000	USD
CY2019	lh	Non Elective Contribution NonElectiveContribution	0.03
CY2019	lh	Discretionary Contribution Percentage Minimum DiscretionaryContributionPercentageMinimum	0.01
CY2019	lh	Discretionary Contribution Percentage Maximum DiscretionaryContributionPercentageMaximum	0.03
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	52300000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	65000000.0	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	58100000	USD
CY2019	lh	Defined Contribution Plan Total Expense DefinedContributionPlanTotalExpense	65600000	USD
CY2018	lh	Defined Contribution Plan Total Expense DefinedContributionPlanTotalExpense	63600000	USD
CY2017	lh	Defined Contribution Plan Total Expense DefinedContributionPlanTotalExpense	59100000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.045
CY2019	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	73900000	USD
CY2018	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	66300000	USD
CY2017	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	58400000	USD
CY2019	us-gaap	Pension Contributions PensionContributions	0.0	USD
CY2018	us-gaap	Pension Contributions PensionContributions	28900000	USD
CY2017	us-gaap	Pension Contributions PensionContributions	16000000.0	USD
CY2018	lh	Defined Benefit Plan Distribution Threshold For Settlement DefinedBenefitPlanDistributionThresholdForSettlement	16500000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-87600000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-93400000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-87600000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	262100000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	246900000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Projected Benefit Obligation DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation	46600000	USD
CY2019	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	3300000	USD
CY2019	lh	Contingentconsiderationadjustment Contingentconsiderationadjustment	14100000	USD
CY2019	lh	Increase Decrease In Noncontrolling Interest Put IncreaseDecreaseInNoncontrollingInterestPut	800000	USD
CY2019Q4	lh	Zero Coupon Notes Fair Value ZeroCouponNotesFairValue	0.0	USD
CY2018	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	2100000	USD
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CY2019	lh	Maximumdeferralpercentageofannualbasesalary Maximumdeferralpercentageofannualbasesalary	0.500
CY2019Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	76700000	USD
CY2018Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	64200000	USD
CY2019Q4	lh	Fair Value Liabilities Measured On Recurring Basis Noncontrolling Interest Puts FairValueLiabilitiesMeasuredOnRecurringBasisNoncontrollingInterestPuts	15800000	USD
CY2019Q4	us-gaap	Foreign Currency Contract Asset Fair Value Disclosure ForeignCurrencyContractAssetFairValueDisclosure	3200000	USD
CY2019Q4	us-gaap	Cash Surrender Value Fair Value Disclosure CashSurrenderValueFairValueDisclosure	80200000	USD
CY2019Q4	lh	Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability	76700000	USD
CY2019Q4	lh	Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability	76700000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	9100000	USD
CY2019Q4	us-gaap	Contingent Consideration Classified As Equity Fair Value Disclosure ContingentConsiderationClassifiedAsEquityFairValueDisclosure	7800000	USD
CY2018Q4	lh	Fair Value Liabilities Measured On Recurring Basis Noncontrolling Interest Puts FairValueLiabilitiesMeasuredOnRecurringBasisNoncontrollingInterestPuts	15000000.0	USD
CY2018Q4	us-gaap	Fair Value Hedges At Fair Value Net FairValueHedgesAtFairValueNet	3100000	USD
CY2018Q4	us-gaap	Foreign Currency Contract Asset Fair Value Disclosure ForeignCurrencyContractAssetFairValueDisclosure	2800000	USD
CY2018Q4	us-gaap	Cash Surrender Value Fair Value Disclosure CashSurrenderValueFairValueDisclosure	63500000	USD
CY2018Q4	lh	Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability	64200000	USD
CY2018Q4	lh	Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability	64200000	USD
CY2018Q4	us-gaap	Contingent Consideration Classified As Equity Fair Value Disclosure ContingentConsiderationClassifiedAsEquityFairValueDisclosure	18600000	USD
CY2018Q4	lh	Zero Coupon Notes Fair Value ZeroCouponNotesFairValue	16900000	USD
CY2019Q4	lh	Senior Notes Fair Value SeniorNotesFairValue	5281100000	USD
CY2018Q4	lh	Senior Notes Fair Value SeniorNotesFairValue	5318000000.0	USD
CY2019	us-gaap	Debt Instrument Basis Spread On Variable Rate1 DebtInstrumentBasisSpreadOnVariableRate1	0.02298
CY2019Q4	us-gaap	Fair Value Hedge Liabilities At Fair Value FairValueHedgeLiabilitiesAtFairValue	1500000	USD
CY2018Q4	us-gaap	Fair Value Hedge Liabilities At Fair Value FairValueHedgeLiabilitiesAtFairValue	0	USD
CY2019Q4	lh	A4.625 Senior Notes Long Term Portion A4.625SeniorNotesLongTermPortion	0	USD
CY2018Q4	lh	A4.625 Senior Notes Long Term Portion A4.625SeniorNotesLongTermPortion	597000000.0	USD
CY2019	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1 ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1	6000000.0	USD
CY2019Q4	lh	Gain Recognizedon Exitof Interest Rate Swap Arrangement GainRecognizedonExitofInterestRateSwapArrangement	1600000	USD
CY2019	lh	Interest Paid In Cash InterestPaidInCash	248900000	USD
CY2018	lh	Interest Paid In Cash InterestPaidInCash	296200000	USD
CY2017	lh	Interest Paid In Cash InterestPaidInCash	239100000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	216800000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	349700000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	348000000.0	USD
CY2019	lh	Noncashconversionofzerocouponconvertibledebt Noncashconversionofzerocouponconvertibledebt	8400000	USD
CY2018	lh	Noncashconversionofzerocouponconvertibledebt Noncashconversionofzerocouponconvertibledebt	300000	USD
CY2017	lh	Noncashconversionofzerocouponconvertibledebt Noncashconversionofzerocouponconvertibledebt	35000000.0	USD
CY2019	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	48700000	USD
CY2018	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	600000	USD
CY2017	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	7300000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2700000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	22100000	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1600000	USD
CY2019Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	110000000.0	USD
CY2018Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	0	USD
CY2017Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	0	USD
CY2019	lh	Intercompanyrevenueelimination Intercompanyrevenueelimination	23400000	USD
CY2018	lh	Intercompanyrevenueelimination Intercompanyrevenueelimination	10500000	USD
CY2017	lh	Intercompanyrevenueelimination Intercompanyrevenueelimination	1800000	USD
CY2019	us-gaap	Revenues Revenues	11554800000	USD
CY2018	us-gaap	Revenues Revenues	11333400000	USD
CY2017	us-gaap	Revenues Revenues	10308000000.0	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	1330200000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	1325700000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	1305200000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-225300000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-57400000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-227700000	USD
CY2019	lh	Income Loss From Continuing Operations Before Income Taxes And Minority Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest	1104900000	USD
CY2018	lh	Income Loss From Continuing Operations Before Income Taxes And Minority Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest	1268300000	USD
CY2017	lh	Income Loss From Continuing Operations Before Income Taxes And Minority Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest	1077500000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	280000000.0	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	384400000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-155400000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	824900000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	883900000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	1232900000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1100000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	200000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5800000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	823800000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	883700000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	1227100000	USD
CY2019	lh	Depreciationand Amortizationof Intangible Assets DepreciationandAmortizationofIntangibleAssets	564700000	USD
CY2018	lh	Depreciationand Amortizationof Intangible Assets DepreciationandAmortizationofIntangibleAssets	543200000	USD
CY2017	lh	Depreciationand Amortizationof Intangible Assets DepreciationandAmortizationofIntangibleAssets	523300000	USD
CY2019	lh	Intercompanyrevenueelimination Intercompanyrevenueelimination	23400000	USD
CY2019	lh	Intercompanyrevenueelimination Intercompanyrevenueelimination	23400000	USD
CY2019	us-gaap	Revenues Revenues	11554800000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2636600000	USD
CY2019Q1	us-gaap	Revenues Revenues	2791200000	USD
CY2019Q2	us-gaap	Revenues Revenues	2881700000	USD
CY2019Q3	us-gaap	Revenues Revenues	2928500000	USD
CY2019Q4	us-gaap	Revenues Revenues	2953400000	USD
CY2019	us-gaap	Revenues Revenues	11554800000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	789700000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	824800000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	817300000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	820700000	USD
CY2019	us-gaap	Gross Profit GrossProfit	3252500000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	318200000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	335700000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	339900000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	336400000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	1330200000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	185600000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	190400000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	220700000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	227100000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	823800000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.88
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.94
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.26
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.34
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.42
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.86
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.93
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.25
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.32
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.35
CY2018Q1	us-gaap	Revenues Revenues	2848300000	USD
CY2018Q2	us-gaap	Revenues Revenues	2866300000	USD
CY2018Q3	us-gaap	Revenues Revenues	2831300000	USD
CY2018Q4	us-gaap	Revenues Revenues	2787500000	USD
CY2018	us-gaap	Revenues Revenues	11333400000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	779000000.0	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	835100000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	789900000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	772400000	USD
CY2018	us-gaap	Gross Profit GrossProfit	3176400000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	305400000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	369200000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	343400000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	307700000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	1325700000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	173200000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	233800000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	318800000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	157900000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	883700000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.70
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.29
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.14
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.58
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.71
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.67
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.27
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.10
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.56
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.61

Files In Submission

Name	View Source	Status
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0000920148-20-000011-index.html	Edgar Link	pending
0000920148-20-000011.txt	Edgar Link	pending
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lh10-k2019_htm.xml	Edgar Link	completed
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$LH
LABCORP HOLDINGS INC. Stock $lh

2019 Q4 Form 10-K Financial Statement

#000092014820000011 Filed on February 28, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$LH LABCORP HOLDINGS INC. Stock $lh

2019 Q4 Form 10-K Financial Statement

#000092014820000011 Filed on February 28, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$LH
LABCORP HOLDINGS INC. Stock $lh