$LH
LABCORP HOLDINGS INC. Stock $lh

$lh Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000092014822000015 Filed on February 25, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$4.056B	$16.12B	$4.490B
YoY Change	-9.66%	15.33%	52.02%
Cost Of Revenue	$2.681B	$10.50B	$2.585B
YoY Change	3.72%	16.3%	21.2%
Gross Profit	$1.375B	$5.624B	$1.905B
YoY Change	-27.82%	13.56%	132.11%
Gross Profit Margin	33.9%	34.89%	42.43%
Selling, General & Admin	$525.8M	$1.952B	$498.2M
YoY Change	5.54%	12.88%	30.93%
% of Gross Profit	38.24%	34.71%	26.15%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$188.0M	$745.1M	$183.9M
YoY Change	2.23%	19.27%	18.04%
% of Gross Profit	13.67%	13.25%	9.65%
Operating Expenses	$618.7M	$1.952B	$589.0M
YoY Change	5.04%	12.88%	32.45%
Operating Profit	$756.3M	$3.260B	$1.316B
YoY Change	-42.53%	33.29%	291.17%
Interest Expense	-$43.20M	$212.1M	-$49.20M
YoY Change	-12.2%	2.27%	-1.01%
% of Operating Profit	-5.71%	6.51%	-3.74%
Other Income/Expense, Net	-$1.300M	$42.50M	-$1.300M
YoY Change	0.0%	-118.78%	-72.92%
Pretax Income	$686.0M	$2.581B	$1.243B
YoY Change	-44.8%	39.76%	324.27%
Income Tax	$132.4M	$747.1M	$304.1M
% Of Pretax Income	19.3%	28.95%	24.47%
Net Earnings	$553.0M	$2.377B	$938.3M
YoY Change	-41.06%	52.77%	313.17%
Net Earnings / Revenue	13.63%	14.75%	20.9%
Basic Earnings Per Share		$24.60
Diluted Earnings Per Share	$5.742M	$24.39	$9.545M
COMMON SHARES
Basic Shares Outstanding	95.70M shares	96.70M shares	97.40M shares
Diluted Shares Outstanding		97.50M shares

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.473B	$1.473B	$1.321B
YoY Change	11.48%	11.48%	290.83%
Cash & Equivalents	$1.473B	$1.473B	$1.321B
Short-Term Investments
Other Short-Term Assets	$478.1M	$478.1M	$365.0M
YoY Change	30.99%	30.99%	-2.41%
Inventory	$401.4M	$401.4M	$423.2M
Prepaid Expenses	$478.1M		$364.8M
Receivables	$2.262B	$2.978B	$2.480B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$5.331B	$5.331B	$5.125B
YoY Change	4.0%	4.01%	71.92%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.815B	$2.897B	$2.730B
YoY Change	3.14%	3.14%	3.53%
Goodwill	$7.959B		$7.752B
YoY Change	2.68%		-1.44%
Intangibles	$3.736B		$3.961B
YoY Change	-5.7%		-1.82%
Long-Term Investments	$60.90M	$60.90M	$74.00M
YoY Change	-17.7%	-17.7%	-12.94%
Other Assets	$462.6M	$402.5M	$410.0M
YoY Change	12.83%	14.67%	-5.83%
Total Long-Term Assets	$15.05B	$15.05B	$14.95B
YoY Change	0.73%	0.72%	-0.79%
TOTAL ASSETS
Total Short-Term Assets	$5.331B	$5.331B	$5.125B
Total Long-Term Assets	$15.05B	$15.05B	$14.95B
Total Assets	$20.39B	$20.39B	$20.07B
YoY Change	1.56%	1.56%	11.22%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$621.3M	$621.3M	$638.9M
YoY Change	-2.75%	-2.77%	1.04%
Accrued Expenses	$1.404B	$1.352B	$1.358B
YoY Change	3.42%	15.02%	44.07%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$12.00M	$12.00M	$383.0M
YoY Change	-96.87%	-96.87%	-9.67%
Total Short-Term Liabilities	$2.783B	$2.783B	$3.079B
YoY Change	-9.6%	-9.62%	15.92%
LONG-TERM LIABILITIES
Long-Term Debt	$5.417B	$5.501B	$5.419B
YoY Change	-0.05%	-0.03%	-6.4%
Other Long-Term Liabilities	$402.0M	$1.045B	$526.4M
YoY Change	-23.63%	-13.25%	37.37%
Total Long-Term Liabilities	$5.819B	$6.546B	$5.945B
YoY Change	-2.13%	-2.41%	-3.69%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.783B	$2.783B	$3.079B
Total Long-Term Liabilities	$5.819B	$6.546B	$5.945B
Total Liabilities	$10.09B	$10.11B	$10.61B
YoY Change	-4.93%	-5.6%	1.48%
SHAREHOLDERS EQUITY
Retained Earnings	$10.46B		$9.479B
YoY Change	10.31%		19.94%
Common Stock	$8.500M		$119.3M
YoY Change	-92.88%		233.24%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares			0.000 shares
Shareholders Equity	$10.27B	$10.27B	$9.360B
YoY Change
Total Liabilities & Shareholders Equity	$20.39B	$20.39B	$20.07B
YoY Change	1.56%	1.56%	11.22%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$553.0M	$2.377B	$938.3M
YoY Change	-41.06%	52.77%	313.17%
Depreciation, Depletion And Amortization	$188.0M	$745.1M	$183.9M
YoY Change	2.23%	19.27%	18.04%
Cash From Operating Activities	$697.5M	$3.110B	$774.6M
YoY Change	-9.95%	45.63%	35.94%
INVESTING ACTIVITIES
Capital Expenditures	-$150.0M	$460.4M	-$99.40M
YoY Change	50.91%	20.62%	-22.46%
Acquisitions		$496.9M
YoY Change		85.69%
Other Investing Activities	-$104.5M	-$424.2M	-$28.60M
YoY Change	265.38%	62.22%	19.67%
Cash From Investing Activities	-$254.5M	-$884.6M	-$128.0M
YoY Change	98.83%	37.53%	-15.84%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$1.000B	$1.669B
YoY Change		1568.5%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.009B	-$2.066B	-1.000M
YoY Change	100760.0%	299.27%	-99.78%
NET CHANGE
Cash From Operating Activities	697.5M	$3.110B	774.6M
Cash From Investing Activities	-254.5M	-$884.6M	-128.0M
Cash From Financing Activities	-1.009B	-$2.066B	-1.000M
Net Change In Cash	-565.6M	$151.9M	645.6M
YoY Change	-187.61%	-84.55%	-2136.59%
FREE CASH FLOW
Cash From Operating Activities	$697.5M	$3.110B	$774.6M
Capital Expenditures	-$150.0M	$460.4M	-$99.40M
Free Cash Flow	$847.5M	$2.649B	$874.0M
YoY Change	-3.03%	51.07%	25.21%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000920148
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	21500000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	22100000	USD
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	93100000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	97500000	shares
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#PropertyPlantAndEquipmentNet
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#PropertyPlantAndEquipmentNet
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherAssetsNoncurrent
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherAssetsNoncurrent
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	1-11353
CY2021	dei	Entity Registrant Name EntityRegistrantName	LABORATORY CORPORATION OF AMERICA HOLDINGS
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	13-3757370
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	358 South Main Street
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Burlington,
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	NC
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	27215
CY2021	dei	City Area Code CityAreaCode	336
CY2021	dei	Local Phone Number LocalPhoneNumber	229-1127
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $0.10 par value
CY2021	dei	Trading Symbol TradingSymbol	LH
CY2021	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	24800000000	USD
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	93400000	shares
CY2021	us-gaap	Revenues Revenues	16120900000	USD
CY2020	us-gaap	Revenues Revenues	13978500000	USD
CY2021	us-gaap	Gross Profit GrossProfit	5624300000	USD
CY2020	us-gaap	Gross Profit GrossProfit	4952800000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	3259500000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	2445400000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2377300000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1556100000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3109600000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2135300000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	24.60
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	15.99
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	24.39
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	15.88
CY2021	lh	Percentof Revenue Contributed PercentofRevenueContributed	1
CY2020	lh	Percentof Revenue Contributed PercentofRevenueContributed	1
CY2019	lh	Percentof Revenue Contributed PercentofRevenueContributed	1
CY2014Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	1000000000.0	USD
CY2021	dei	Auditor Firm AuditorFirmId	34
CY2021	dei	Auditor Name AuditorName	DELOITTE & TOUCHE LLP
CY2021	dei	Auditor Location AuditorLocation	Raleigh, North Carolina
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1472700000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1320800000	USD
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	2261500000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	2479800000	USD
CY2021Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	716800000	USD
CY2020Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	536800000	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	401400000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	423200000	USD
CY2021Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	478100000	USD
CY2020Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	364800000	USD
CY2021Q4	us-gaap	Assets Current AssetsCurrent	5330500000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	5125400000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2815400000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2729600000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	7958900000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	7751500000	USD
CY2020Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	73500000	USD
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3735500000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3961100000	USD
CY2021Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	60900000	USD
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	21600000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	20600000	USD
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	462600000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	410000000.0	USD
CY2021Q4	us-gaap	Assets Assets	20385400000	USD
CY2020Q4	us-gaap	Assets Assets	20071700000	USD
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	621300000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	638900000	USD
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	1404100000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	1357700000	USD
CY2021Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	558500000	USD
CY2020Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	506500000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	187000000.0	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	192000000.0	USD
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	10500000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	6700000	USD
CY2021Q4	lh	Short Term Debt And Long Term Debt Current Maturities ShortTermDebtAndLongTermDebtCurrentMaturities	1500000	USD
CY2020Q4	lh	Short Term Debt And Long Term Debt Current Maturities ShortTermDebtAndLongTermDebtCurrentMaturities	376700000	USD
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	2782900000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	3078500000	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5416500000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5419000000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	642500000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	677600000	USD
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	84600000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	84400000	USD
CY2021Q4	lh	Deferred Income Taxes And Other Tax Liabilities DeferredIncomeTaxesAndOtherTaxLiabilities	762900000	USD
CY2020Q4	lh	Deferred Income Taxes And Other Tax Liabilities DeferredIncomeTaxesAndOtherTaxLiabilities	828500000	USD
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	402000000.0	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	526400000	USD
CY2021Q4	us-gaap	Liabilities Liabilities	10091400000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	10614400000	USD
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q4	lh	Noncontrolling Interest Mezzanine Equity NoncontrollingInterestMezzanineEquity	20600000	USD
CY2020Q4	lh	Noncontrolling Interest Mezzanine Equity NoncontrollingInterestMezzanineEquity	20700000	USD
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	8500000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	9000000.0	USD
CY2021Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	0	USD
CY2020Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	110300000	USD
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	10456800000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	9479200000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-191900000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-161900000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	10273400000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	9436600000	USD
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	20385400000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	20071700000	USD
CY2021	us-gaap	Revenues Revenues	16120900000	USD
CY2020	us-gaap	Revenues Revenues	13978500000	USD
CY2019	us-gaap	Revenues Revenues	11554800000	USD
CY2021	us-gaap	Cost Of Revenue CostOfRevenue	10496600000	USD
CY2020	us-gaap	Cost Of Revenue CostOfRevenue	9025700000	USD
CY2019	us-gaap	Cost Of Revenue CostOfRevenue	8302300000	USD
CY2021	us-gaap	Gross Profit GrossProfit	5624300000	USD
CY2020	us-gaap	Gross Profit GrossProfit	4952800000	USD
CY2019	us-gaap	Gross Profit GrossProfit	3252500000	USD
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1952100000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1729300000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	1624500000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	369600000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	275400000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	243200000	USD
CY2021	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	USD
CY2020	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	462100000	USD
CY2019	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	USD
CY2021	lh	Net Restructuring And Other Special Charges NetRestructuringAndOtherSpecialCharges	43100000	USD
CY2020	lh	Net Restructuring And Other Special Charges NetRestructuringAndOtherSpecialCharges	40600000	USD
CY2019	lh	Net Restructuring And Other Special Charges NetRestructuringAndOtherSpecialCharges	54600000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	3259500000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	2445400000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	1330200000	USD
CY2021	us-gaap	Interest Expense InterestExpense	212100000	USD
CY2020	us-gaap	Interest Expense InterestExpense	207400000	USD
CY2019	us-gaap	Interest Expense InterestExpense	240700000	USD
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	26500000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2900000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	9800000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	824900000	USD
CY2021	us-gaap	Investment Income Net InvestmentIncomeNet	10200000	USD
CY2020	us-gaap	Investment Income Net InvestmentIncomeNet	10300000	USD
CY2019	us-gaap	Investment Income Net InvestmentIncomeNet	8800000	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	42500000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-32100000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3200000	USD
CY2021	lh	Income Loss From Continuing Operations Before Income Taxes And Minority Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest	3126600000	USD
CY2020	lh	Income Loss From Continuing Operations Before Income Taxes And Minority Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest	2219100000	USD
CY2019	lh	Income Loss From Continuing Operations Before Income Taxes And Minority Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest	1104900000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	747100000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	662100000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	280000000.0	USD
CY2021	us-gaap	Profit Loss ProfitLoss	2379500000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	1557000000	USD
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2200000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	900000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1100000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2377300000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1556100000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	823800000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	24.60
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	15.99
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.42
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	24.39
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	15.88
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.35
CY2021	us-gaap	Profit Loss ProfitLoss	2379500000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	1557000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	824900000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-104600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	264100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	104400000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-91700000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	65700000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	17400000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-12900000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	198400000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	87000000.0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	17100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-12100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-3700000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-30000000.0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	210500000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	90700000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	2349500000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1767500000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	915600000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2347300000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	2200000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	900000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	1100000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1766600000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	914500000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	11700000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1451100000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	7156700000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	1108100000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-463100000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	7048300000	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	7643900000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1556100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	210500000	USD
CY2020	lh	Issuance Of Common Stock Under Employee Stock Plans IssuanceOfCommonStockUnderEmployeeStockPlans	55900000	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	34500000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	111700000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	100000000.0	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	9436600000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2377300000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-30000000.0	USD
CY2021	lh	Issuance Of Common Stock Under Employee Stock Plans IssuanceOfCommonStockUnderEmployeeStockPlans	51700000	USD
CY2021	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	47400000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	153700000	USD
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1668500000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	10273400000	USD
CY2021	us-gaap	Profit Loss ProfitLoss	2379500000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	1557000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	824900000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	745100000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	624700000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	577200000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	153700000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	111700000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	107000000.0	USD
CY2021	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2020	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2019	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	-13200000	USD
CY2021	lh	Depreciation And Amortization Of Leased Assets DepreciationAndAmortizationOfLeasedAssets	194900000	USD
CY2020	lh	Depreciation And Amortization Of Leased Assets DepreciationAndAmortizationOfLeasedAssets	200300000	USD
CY2019	lh	Depreciation And Amortization Of Leased Assets DepreciationAndAmortizationOfLeasedAssets	194100000	USD
CY2021	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	USD
CY2020	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	462100000	USD
CY2019	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	USD
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	75900000	USD
CY2020	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	47000000.0	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-29200000	USD
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-24000000.0	USD
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	83400000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-6500000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-222000000.0	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	913400000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	64100000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	179200000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	42500000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	59000000.0	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-2800000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	196600000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	21900000	USD
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	68200000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	5400000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	42600000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-10200000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-5300000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-12800000	USD
CY2021	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	45000000.0	USD
CY2020	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	48400000	USD
CY2019	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	38100000	USD
CY2021	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-275900000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	257900000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-132100000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3109600000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2135300000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1444700000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	460400000	USD
CY2020	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	0	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	381700000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	400200000	USD
CY2021	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	27800000	USD
CY2020	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	40100000	USD
CY2019	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	27500000	USD
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	87300000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	42100000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	7700000	USD
CY2021	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	13200000	USD
CY2020	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	1000000.0	USD
CY2019	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	11200000	USD
CY2021	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2020	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	3100000	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	USD
CY2021	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	0	USD
CY2019	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	1700000	USD
CY2021	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	375000000.0	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	496900000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	267600000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	876000000.0	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-884600000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-643200000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1283100000	USD
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1000000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1050000000	USD
CY2021	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	1000000000	USD
CY2020	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	412200000	USD
CY2019	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	687900000	USD
CY2021	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	0	USD
CY2020	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	0	USD
CY2019	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	850000000.0	USD
CY2020	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	0	USD
CY2019	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	1002000000	USD
CY2021	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2020	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	151700000	USD
CY2019	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	495000000.0	USD
CY2021	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	151700000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	495000000.0	USD
CY2021	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-47400000	USD
CY2020	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-34500000	USD
CY2019	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-40600000	USD
CY2021	lh	Net Proceeds From Issuance Of Stock To Employees NetProceedsFromIssuanceOfStockToEmployees	51700000	USD
CY2020	lh	Net Proceeds From Issuance Of Stock To Employees NetProceedsFromIssuanceOfStockToEmployees	55900000	USD
CY2019	lh	Net Proceeds From Issuance Of Stock To Employees NetProceedsFromIssuanceOfStockToEmployees	64700000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1668500000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	100000000.0	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	450000000.0	USD
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-26600000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-26600000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-36900000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2065800000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-517400000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-252700000	USD
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-7300000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8600000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1800000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	151900000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	983300000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-89300000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1320800000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	337500000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	426800000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1472700000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1320800000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	337500000	USD
CY2021Q4	dei	Entity Number Of Employees EntityNumberOfEmployees	75500	Employee
CY2021	lh	Cost Method Investments Maximum Ownership Percentage CostMethodInvestmentsMaximumOwnershipPercentage	0.20
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:3pt;margin-top:7pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-bottom:7pt;margin-top:3pt;text-align:justify;text-indent:15.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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, fair value of goodwill and indefinite-lived intangible assets, amortization lives for acquired intangible assets, and accruals for self-insurance reserves, litigation reserves and pensions. Actual results could differ from those estimates.</span></div><div style="margin-bottom:7pt;margin-top:3pt;text-align:justify;text-indent:13.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The extent to which the COVID-19 pandemic has and will continue to impact the Company’s business and financial results depend on numerous evolving factors including, but not limited to: the magnitude and duration of the COVID-19 pandemic, the impact to worldwide macroeconomic conditions including interest rates, employment rates and health insurance coverage, the speed of the anticipated recovery, and governmental and business reactions to the pandemic. The Company assessed certain </span></div>accounting matters that generally require consideration of forecasted financial information in context with the information reasonably available to the Company and the unknown future impacts of COVID-19 as of December 31, 2021, and through the date of this Annual Report. The accounting matters assessed included, but were not limited to, the Company’s implicit price concessions and credit losses, equity investments, and the carrying value of goodwill and other long-lived assets. The Company’s future assessment of the magnitude and duration of COVID-19, as well as other factors, could impact the Company’s consolidated financial statements in future reporting periods.
CY2021Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	1471000000	USD
CY2020Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	1319400000	USD
CY2021Q4	lh	Concentration Risk Accounts Receivable Medicare And Medicaid ConcentrationRiskAccountsReceivableMedicareAndMedicaid	94500000	USD
CY2020Q4	lh	Concentration Risk Accounts Receivable Medicare And Medicaid ConcentrationRiskAccountsReceivableMedicareAndMedicaid	109800000	USD
CY2021Q4	lh	Accountsreceivablefrom Ontariogovernmentsponsoredhealthcareplan AccountsreceivablefromOntariogovernmentsponsoredhealthcareplan	7200000	USD
CY2020Q4	lh	Accountsreceivablefrom Ontariogovernmentsponsoredhealthcareplan AccountsreceivablefromOntariogovernmentsponsoredhealthcareplan	600000	USD
CY2021Q4	lh	Percentofgrossaccountsreceivableduefrompatients Percentofgrossaccountsreceivableduefrompatients	0.167
CY2020Q4	lh	Percentofgrossaccountsreceivableduefrompatients Percentofgrossaccountsreceivableduefrompatients	0.139
CY2021	us-gaap	Net Income Loss NetIncomeLoss	2377300000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	96700000	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	24.60
CY2020	us-gaap	Net Income Loss NetIncomeLoss	1556100000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	97300000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	15.99
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
CY2021	lh	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	800000	shares
CY2020	lh	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	700000	shares
CY2019	lh	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	700000	shares
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	2377300000	USD
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	97500000	shares
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	24.39
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1556100000	USD
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	98000000.0	shares
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	15.88
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
CY2021	us-gaap	Earnings Per Share Potentially Dilutive Securities EarningsPerSharePotentiallyDilutiveSecurities	0.1
CY2020	us-gaap	Earnings Per Share Potentially Dilutive Securities EarningsPerSharePotentiallyDilutiveSecurities	0.2
CY2019	us-gaap	Earnings Per Share Potentially Dilutive Securities EarningsPerSharePotentiallyDilutiveSecurities	0.2
CY2021Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	371500000	USD
CY2020Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	403600000	USD
CY2021Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	29900000	USD
CY2020Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	19600000	USD
CY2021Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	40100000	USD
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	20200000	USD
CY2021	lh	Propertyplantandequipmentusefullifesoftwareminimum Propertyplantandequipmentusefullifesoftwareminimum	3	Y
CY2021	lh	Propertyplantandequipmentusefullifesoftwaremaximum Propertyplantandequipmentusefullifesoftwaremaximum	15	Y
CY2021	lh	Property Plant And Equipment Useful Life Software Average PropertyPlantAndEquipmentUsefulLifeSoftwareAverage	5	Y
CY2021Q4	lh	Income Tax Benefit Minimum Certainty Percentage IncomeTaxBenefitMinimumCertaintyPercentage	0.50
CY2021Q4	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-76900000	USD
CY2021	lh	Percentof Revenue Contributed PercentofRevenueContributed	1
CY2019	us-gaap	Amortization Of Deferred Sales Commissions AmortizationOfDeferredSalesCommissions	21200000	USD
CY2021	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	14200000	USD
CY2020	lh	Percentof Revenue Contributed PercentofRevenueContributed	1
CY2019	lh	Percentof Revenue Contributed PercentofRevenueContributed	1
CY2021	lh	Percent Of Domestic Revenue PercentOfDomesticRevenue	0.779
CY2020	lh	Percent Of Domestic Revenue PercentOfDomesticRevenue	0.801
CY2019	lh	Percent Of Domestic Revenue PercentOfDomesticRevenue	0.777
CY2021	lh	Sales Commission Amortization Period Minimum SalesCommissionAmortizationPeriodMinimum	P1Y
CY2021	lh	Sales Commission Amortization Period Maximum SalesCommissionAmortizationPeriodMaximum	P5Y
CY2021Q4	us-gaap	Accrued Sales Commission Current And Noncurrent AccruedSalesCommissionCurrentAndNoncurrent	36200000	USD
CY2020Q4	us-gaap	Accrued Sales Commission Current And Noncurrent AccruedSalesCommissionCurrentAndNoncurrent	32600000	USD
CY2021Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	14400000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	12600000	USD
CY2021Q4	us-gaap	Amount Of Deferred Costs Related To Long Term Contracts AmountOfDeferredCostsRelatedToLongTermContracts	50600000	USD
CY2020Q4	us-gaap	Amount Of Deferred Costs Related To Long Term Contracts AmountOfDeferredCostsRelatedToLongTermContracts	45200000	USD
CY2021	us-gaap	Amortization Of Deferred Sales Commissions AmortizationOfDeferredSalesCommissions	27500000	USD
CY2020	us-gaap	Amortization Of Deferred Sales Commissions AmortizationOfDeferredSalesCommissions	23200000	USD
CY2019	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	8700000	USD
CY2020	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	10100000	USD
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	21500000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	22100000	USD
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	2261500000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	2479800000	USD
CY2021Q4	us-gaap	Contract With Customer Asset Gross ContractWithCustomerAssetGross	730800000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Gross ContractWithCustomerAssetGross	548100000	USD
CY2021Q4	us-gaap	Allowance For Doubtful Other Receivables Current AllowanceForDoubtfulOtherReceivablesCurrent	14000000.0	USD
CY2020Q4	us-gaap	Allowance For Doubtful Other Receivables Current AllowanceForDoubtfulOtherReceivablesCurrent	11300000	USD
CY2021Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	716800000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	536800000	USD
CY2021Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	558500000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	506500000	USD
CY2021	lh	Long Term Contracts Duration Maximum LongTermContractsDurationMaximum	P8Y
CY2021	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	69800000	USD
CY2021	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	319400000	USD
CY2020	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	262600000	USD
CY2019	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	250200000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	19000000.0	USD
CY2019Q4	lh	Unbilled Services Allowancefor Credit Loss UnbilledServicesAllowanceforCreditLoss	2300000	USD
CY2019Q4	lh	Note Receivable Allowancefor Credit Loss NoteReceivableAllowanceforCreditLoss	0	USD
CY2019Q4	lh	Allowancefor Credit Loss AllowanceforCreditLoss	21300000	USD
CY2020	lh	Current Expected Credit Losses Opening Balance Impact On Retained Earnings CurrentExpectedCreditLossesOpeningBalanceImpactOnRetainedEarnings	7000000.0	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	7000000.0	USD
CY2020	lh	Unbilled Services Credit Loss Expense Reversal UnbilledServicesCreditLossExpenseReversal	9000000.0	USD
CY2020	lh	Note Receivable Credit Loss Expense Reversal NoteReceivableCreditLossExpenseReversal	700000	USD
CY2020	lh	Credit Loss Expense Reversal CreditLossExpenseReversal	16700000	USD
CY2020	lh	Allowancefor Credit Loss Write Off AllowanceforCreditLossWriteOff	5900000	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	496900000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	22100000	USD
CY2020Q4	lh	Unbilled Services Allowancefor Credit Loss UnbilledServicesAllowanceforCreditLoss	11300000	USD
CY2020Q4	lh	Note Receivable Allowancefor Credit Loss NoteReceivableAllowanceforCreditLoss	5700000	USD
CY2020Q4	lh	Allowancefor Credit Loss AllowanceforCreditLoss	39100000	USD
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	3800000	USD
CY2021	lh	Unbilled Services Credit Loss Expense Reversal UnbilledServicesCreditLossExpenseReversal	2700000	USD
CY2021	lh	Note Receivable Credit Loss Expense Reversal NoteReceivableCreditLossExpenseReversal	5000000.0	USD
CY2021	lh	Credit Loss Expense Reversal CreditLossExpenseReversal	1500000	USD
CY2021	lh	Allowancefor Credit Loss Write Off AllowanceforCreditLossWriteOff	4500000	USD
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	21500000	USD
CY2021Q4	lh	Unbilled Services Allowancefor Credit Loss UnbilledServicesAllowanceforCreditLoss	13900000	USD
CY2021Q4	lh	Note Receivable Allowancefor Credit Loss NoteReceivableAllowanceforCreditLoss	700000	USD
CY2021Q4	lh	Allowancefor Credit Loss AllowanceforCreditLoss	36100000	USD
CY2021Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	5757500000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	5128400000	USD
CY2021Q4	lh	Percentofremainingperformanceobligationsrecognizedasrevenueinnextyear Percentofremainingperformanceobligationsrecognizedasrevenueinnextyear	0.400
CY2021	lh	Long Term Contracts Duration Minimum LongTermContractsDurationMinimum	P1Y
CY2020	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	80900000	USD
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Receivables BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables	10800000	USD
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther	3200000	USD
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Inventory BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory	1600000	USD
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Prepaid Expense And Other Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets	3000000.0	USD
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	56600000	USD
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	198500000	USD
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	572100000	USD
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Accounts Payable BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable	2500000	USD
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther	3900000	USD
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Deferred Revenue BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue	6600000	USD
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	75200000	USD
CY2021Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet	496900000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	267600000	USD
CY2020	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	121300000	USD
CY2019Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	110000000.0	USD
CY2021	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
CY2021	lh	Net Restructuring Charges NetRestructuringCharges	43100000	USD
CY2021	us-gaap	Severance Costs1 SeveranceCosts1	16300000	USD
CY2021	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	28000000.0	USD
CY2021	lh	Employee Severance Benefits Related Restructuring Reserve Accrual Adjustment EmployeeSeveranceBenefitsRelatedRestructuringReserveAccrualAdjustment	400000	USD
CY2021	lh	Facility Related Restructuring Reserve Accrual Adjustment FacilityRelatedRestructuringReserveAccrualAdjustment	800000	USD
CY2020	lh	Net Restructuring Charges NetRestructuringCharges	40600000	USD
CY2021	us-gaap	Restructuring Charges RestructuringCharges	44300000	USD
CY2020	us-gaap	Severance Costs1 SeveranceCosts1	14100000	USD
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	17400000	USD
CY2020	us-gaap	Business Exit Costs1 BusinessExitCosts1	18900000	USD
CY2020	lh	Employee Severance Benefits Related Restructuring Reserve Accrual Adjustment EmployeeSeveranceBenefitsRelatedRestructuringReserveAccrualAdjustment	600000	USD
CY2020	lh	Facility Related Restructuring Reserve Accrual Adjustment FacilityRelatedRestructuringReserveAccrualAdjustment	9200000	USD
CY2019	lh	Net Restructuring Charges NetRestructuringCharges	54600000	USD
CY2019	us-gaap	Severance Costs1 SeveranceCosts1	32900000	USD
CY2019	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	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
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	13400000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	33000000.0	USD
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	17400000	USD
CY2020	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-9800000	USD
CY2020	us-gaap	Payments For Restructuring PaymentsForRestructuring	46200000	USD
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	7800000	USD
CY2021	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-1200000	USD
CY2021	us-gaap	Payments For Restructuring PaymentsForRestructuring	42500000	USD
CY2021Q4	us-gaap	Restructuring Reserve RestructuringReserve	8400000	USD
CY2021Q4	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	6800000	USD
CY2021Q4	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	1600000	USD
CY2021Q4	us-gaap	Restructuring Reserve RestructuringReserve	8400000	USD
CY2021	lh	Numberofyearsrestructuringliabilitiesexpectedtobepaidoutover Numberofyearsrestructuringliabilitiesexpectedtobepaidoutover	P4Y9M18D
CY2021Q4	us-gaap	Lessee Operating Lease Term Of Contract LesseeOperatingLeaseTermOfContract	P12Y
CY2021Q4	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P15Y
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	220700000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	215400000	USD
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	9400000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	11200000	USD
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	5400000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	4700000	USD
CY2021	us-gaap	Lease Cost LeaseCost	14800000	USD
CY2020	us-gaap	Lease Cost LeaseCost	15900000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	219600000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	213800000	USD
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	5400000	USD
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	4700000	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	13100000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	15200000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	164600000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	185900000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	0	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	0	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	746300000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	789800000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	187000000.0	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	192000000.0	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	642500000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	677600000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	829500000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	869600000	USD
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	81700000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	79700000	USD
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	10500000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	6700000	USD
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	84600000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	84400000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	95100000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	91100000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y4M24D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y7M6D
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P15Y6M
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P15Y10M24D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.030
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.033
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.056
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.051
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	204000000.0	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	12300000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Two LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	159400000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	12300000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Three LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	110700000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	10900000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Four LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	85300000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	8900000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	70400000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	8100000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	325500000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	93800000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	955300000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	146300000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	125800000	USD
CY2021Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	51200000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	187000000.0	USD
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	10500000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	642500000	USD
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	84600000	USD
CY2021	us-gaap	Variable Lease Payment VariableLeasePayment	28400000	USD
CY2020	us-gaap	Variable Lease Payment VariableLeasePayment	26700000	USD
CY2019	us-gaap	Variable Lease Payment VariableLeasePayment	20800000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	5228600000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4932700000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2413200000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2203100000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2815400000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2729600000	USD
CY2021	lh	Software Depreciation SoftwareDepreciation	82400000	USD
CY2020	lh	Software Depreciation SoftwareDepreciation	84700000	USD
CY2019	lh	Software Depreciation SoftwareDepreciation	90400000	USD
CY2021Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	5423600000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	7751500000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	7865000000	USD
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	298400000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	166200000	USD
CY2021	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	0	USD
CY2020	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	0	USD
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	422400000	USD
CY2021	us-gaap	Goodwill Translation And Purchase Accounting Adjustments GoodwillTranslationAndPurchaseAccountingAdjustments	-91000000.0	USD
CY2020	us-gaap	Goodwill Translation And Purchase Accounting Adjustments GoodwillTranslationAndPurchaseAccountingAdjustments	142700000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	7958900000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	7751500000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1688100000	USD
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3735500000	USD
CY2020Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	6090100000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2129000000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3961100000	USD
CY2020	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	462100000	USD
CY2021	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	198500000	USD
CY2021	us-gaap	Acquired Finite Lived Intangible Assets Weighted Average Useful Life AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife	P11Y3M18D
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	369600000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	275400000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	243200000	USD
CY2020	lh	Adjustmentstointangiblesthroughamortizationexpense Adjustmentstointangiblesthroughamortizationexpense	400000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	237900000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	234600000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	230000000.0	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	217800000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	208500000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	2021900000	USD
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	735500000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	623200000	USD
CY2021Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	239600000	USD
CY2020Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	374800000	USD
CY2021Q4	lh	Accrued Pass Through Expenses AccruedPassThroughExpenses	149100000	USD
CY2020Q4	lh	Accrued Pass Through Expenses AccruedPassThroughExpenses	96000000.0	USD
CY2021Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	279900000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	263700000	USD
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	1404100000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	1357700000	USD
CY2021Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	136500000	USD
CY2020Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	220500000	USD
CY2021Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	104400000	USD
CY2020Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	89200000	USD
CY2021Q4	lh	Other Liabilities Noncurrent Other OtherLiabilitiesNoncurrentOther	161100000	USD
CY2020Q4	lh	Other Liabilities Noncurrent Other OtherLiabilitiesNoncurrentOther	216700000	USD
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	402000000.0	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	526400000	USD
CY2021Q4	us-gaap	Debt Current DebtCurrent	1500000	USD
CY2020Q4	us-gaap	Debt Current DebtCurrent	376700000	USD
CY2021Q4	lh	A3.75 Seniornotesdue2022 A3.75Seniornotesdue2022	0	USD
CY2020Q4	lh	A3.75 Seniornotesdue2022 A3.75Seniornotesdue2022	500000000.0	USD
CY2021Q4	lh	A3.20 Seniornotesdue2022 A3.20Seniornotesdue2022	0	USD
CY2020Q4	lh	A3.20 Seniornotesdue2022 A3.20Seniornotesdue2022	500000000.0	USD
CY2021Q4	lh	A4.00 Seniornotesdue2023 A4.00Seniornotesdue2023	300000000.0	USD
CY2020Q4	lh	A4.00 Seniornotesdue2023 A4.00Seniornotesdue2023	300000000.0	USD
CY2021Q4	lh	Seniornotesdue2024 Seniornotesdue2024	600000000.0	USD
CY2020Q4	lh	Seniornotesdue2024 Seniornotesdue2024	600000000.0	USD
CY2021Q4	lh	A3.60 Seniornotesdue2025 A3.60Seniornotesdue2025	1000000000	USD
CY2020Q4	lh	A3.60 Seniornotesdue2025 A3.60Seniornotesdue2025	1000000000	USD
CY2021Q4	lh	A155 Senior Notes Due2026 A155SeniorNotesDue2026	500000000.0	USD
CY2020Q4	lh	A155 Senior Notes Due2026 A155SeniorNotesDue2026	0	USD
CY2021Q4	lh	Seniornotesdue2027 Seniornotesdue2027	600000000.0	USD
CY2020Q4	lh	Seniornotesdue2027 Seniornotesdue2027	600000000.0	USD
CY2020Q4	lh	A270 Senior Notes Due2031 A270SeniorNotesDue2031	0	USD
CY2021Q4	lh	A4.70 Seniornotesdue2045 A4.70Seniornotesdue2045	900000000.0	USD
CY2020Q4	lh	A4.70 Seniornotesdue2045 A4.70Seniornotesdue2045	900000000.0	USD
CY2021Q4	lh	A2.30seniornotesdue2024 A2.30seniornotesdue2024	400000000.0	USD
CY2020Q4	lh	A2.30seniornotesdue2024 A2.30seniornotesdue2024	400000000.0	USD
CY2021Q4	lh	A2.95seniornotesdue2029 A2.95seniornotesdue2029	650000000.0	USD
CY2020Q4	lh	A2.95seniornotesdue2029 A2.95seniornotesdue2029	650000000.0	USD
CY2021Q4	lh	Longtermdebtissuancecosts Longtermdebtissuancecosts	41000000.0	USD
CY2020Q4	lh	Longtermdebtissuancecosts Longtermdebtissuancecosts	37100000	USD
CY2021Q4	us-gaap	Long Term Notes Payable LongTermNotesPayable	4600000	USD
CY2020Q4	us-gaap	Long Term Notes Payable LongTermNotesPayable	6100000	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5416500000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5419000000	USD
CY2019Q2	lh	A2019 Term Loan A2019TermLoan	850000000.0	USD
CY2014Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	1000000000	USD
CY2014Q4	lh	Credit Facility Optionto Increase CreditFacilityOptiontoIncrease	500000000.0	USD
CY2014Q4	lh	Credit Facility Maximum Swing Line Borrowings CreditFacilityMaximumSwingLineBorrowings	100000000.0	USD
CY2021	us-gaap	Line Of Credit Facility Commitment Fee Description LineOfCreditFacilityCommitmentFeeDescription	0.10% to 0.25%
CY2021Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	1000000000	USD
CY2021Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	79800000	USD
CY2021Q2	lh	A2021 Senior Notes A2021SeniorNotes	1000000000	USD
CY2021Q4	lh	A155 Senior Notes Due2026 A155SeniorNotesDue2026	500000000.0	USD
CY2021Q4	lh	A270 Senior Notes Due2031 A270SeniorNotesDue2031	500000000.0	USD
CY2021	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	989400000	USD
CY2021Q4	lh	A270 Senior Notes Due2031 A270SeniorNotesDue2031	500000000.0	USD
CY2021	us-gaap	Debt Instrument Interest Rate Terms DebtInstrumentInterestRateTerms	1.0706
CY2021Q4	us-gaap	Interest Rate Fair Value Hedge Derivative At Fair Value Net InterestRateFairValueHedgeDerivativeAtFairValueNet	2900000	USD
CY2021Q4	lh	Balance Of Senior Notes Mature During Q42020 BalanceOfSeniorNotesMatureDuringQ42020	412200000	USD
CY2021Q4	lh	Gain Recognizedon Exitof Interest Rate Swap Arrangement GainRecognizedonExitofInterestRateSwapArrangement	1600000	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1500000	USD
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal In Year Two LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearTwo	300000000.0	USD
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal In Year Three LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearThree	1000000000	USD
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal In Year Four LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFour	1000000000	USD
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal In Year Five LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFive	500000000.0	USD
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Maturities Repayments Of Principal After Year Five LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalAfterYearFive	2657500000	USD
CY2021Q4	lh	Longtermdebtfutureminimumpaymentsinterestincludedinpayments Longtermdebtfutureminimumpaymentsinterestincludedinpayments	5459000000	USD
CY2021Q4	lh	Total Shortand Long Term Debt Issuance Costs TotalShortandLongTermDebtIssuanceCosts	41000000.0	USD
CY2021Q4	lh	Long Term Debt Excluding Debt Issuance Costs LongTermDebtExcludingDebtIssuanceCosts	5418000000	USD
CY2021Q4	us-gaap	Debt Current DebtCurrent	1500000	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5416500000	USD
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	265000000.0	shares
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
CY2021Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	30000000.0	shares
CY2021Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.10
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	97500000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	97200000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	122400000	shares
CY2021	lh	Commons Stock Issued During Period Shares Employee Stock Plans CommonsStockIssuedDuringPeriodSharesEmployeeStockPlans	800000	shares
CY2020	lh	Commons Stock Issued During Period Shares Employee Stock Plans CommonsStockIssuedDuringPeriodSharesEmployeeStockPlans	900000	shares
CY2019	lh	Commons Stock Issued During Period Shares Employee Stock Plans CommonsStockIssuedDuringPeriodSharesEmployeeStockPlans	1200000	shares
CY2021	us-gaap	Stock Issued During Period Shares Conversion Of Convertible Securities StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	0	shares
CY2020	us-gaap	Stock Issued During Period Shares Conversion Of Convertible Securities StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	0	shares
CY2019	us-gaap	Stock Issued During Period Shares Conversion Of Convertible Securities StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	100000	shares
CY2021	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	0	shares
CY2020	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	0	shares
CY2019	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	23600000	shares
CY2021	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	5200000	shares
CY2020	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	600000	shares
CY2019	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	2900000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	93100000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	97500000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	97200000	shares
CY2021Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	2500000000	USD
CY2021Q4	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1000000000	USD
CY2021	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	5200000	shares
CY2021	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	282.05
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1668500000	USD
CY2021Q4	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1000000000	USD
CY2021Q4	lh	Common Stock Repurchase Authorization Outstanding CommonStockRepurchaseAuthorizationOutstanding	1631500000	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
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	264100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	-72900000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	191200000	USD
CY2020	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
CY2020	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	7200000	USD
CY2020	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	7200000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	12100000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-12100000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-21300000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	140600000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-104600000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	101700000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	-2900000	USD
CY2021	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
CY2021	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	-6300000	USD
CY2021	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	-6300000	USD
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-17100000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	17100000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-125900000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	66000000.0	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-191900000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	2580600000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1846500000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	784400000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	546000000.0	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	372500000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	320500000	USD
CY2021	lh	Income Loss From Continuing Operations Before Income Taxes And Minority Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest	3126600000	USD
CY2020	lh	Income Loss From Continuing Operations Before Income Taxes And Minority Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest	2219100000	USD
CY2019	lh	Income Loss From Continuing Operations Before Income Taxes And Minority Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesAndMinorityInterest	1104900000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	545500000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	455300000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	126700000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	171900000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	172800000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	40200000	USD
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	107700000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	81000000.0	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	83900000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	825100000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	709100000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	250800000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-64600000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-6700000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	38200000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-13700000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-28100000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2500000	USD
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	300000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-12200000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-11500000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-78000000.0	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-47000000.0	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	29200000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	747100000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	662100000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	280000000.0	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.039
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.053
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.032
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.005
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.004
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.001
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges	0.007
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	0.040
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	0
CY2021	lh	Effective Income Tax Rate Reconciliation Gilti Impact Percent EffectiveIncomeTaxRateReconciliationGILTIImpactPercent	0
CY2020	lh	Effective Income Tax Rate Reconciliation Gilti Impact Percent EffectiveIncomeTaxRateReconciliationGILTIImpactPercent	-0.001
CY2019	lh	Effective Income Tax Rate Reconciliation Gilti Impact Percent EffectiveIncomeTaxRateReconciliationGILTIImpactPercent	0.011
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.005
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.006
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.239
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.298
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.253
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	22300000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	20000000.0	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	145200000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	115600000	USD
CY2021Q4	lh	Deferred Tax Asset Right Of Use Asset DeferredTaxAssetRightOfUseAsset	176300000	USD
CY2020Q4	lh	Deferred Tax Asset Right Of Use Asset DeferredTaxAssetRightOfUseAsset	187600000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Restructuring Charges DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges	19100000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Restructuring Charges DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges	22600000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	184500000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	206800000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	92700000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	126800000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	640100000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	679400000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	149200000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	167600000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	490900000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	511800000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	166900000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	179500000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	823800000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	835500000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	143900000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	203900000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	47600000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	46300000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1182200000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1265200000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	691300000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	753400000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	167600000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	145400000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	156900000	USD
CY2021	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	6800000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	5800000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	0	USD
CY2021	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	25200000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	16400000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Adjustments ValuationAllowancesAndReservesAdjustments	11500000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	149200000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	167600000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	145400000	USD
CY2021Q4	lh	Federal Tax Loss Carryovers FederalTaxLossCarryovers	155700000	USD
CY2021	us-gaap	Operating Loss Carryforwards Limitations On Use OperatingLossCarryforwardsLimitationsOnUse	80
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	439200000	USD
CY2021Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	367200000	USD
CY2021Q4	lh	Federaland State Attribute Carryforwards FederalandStateAttributeCarryforwards	141400000	USD
CY2021	lh	Federaland State Attribute Carryforward Valuation Allowance FederalandStateAttributeCarryforwardValuationAllowance	99100000	USD
CY2021Q4	lh	Foreign Tax Loss Carryovers ForeignTaxLossCarryovers	96200000	USD
CY2021	lh	Foreign Tax Loss Carryover Valuation Allowance ForeignTaxLossCarryoverValuationAllowance	11000000.0	USD
CY2021Q4	lh	Foreign Tax Loss Carryovers Expirein2034 ForeignTaxLossCarryoversExpirein2034	444000000.0	USD
CY2021Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	15500000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	167600000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	149200000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	52400000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	48800000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	6500000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	8300000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized	8900000	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	4300000	shares
CY2021	us-gaap	Income Tax Examination Penalties Expense IncomeTaxExaminationPenaltiesExpense	1600000	USD
CY2020	us-gaap	Income Tax Examination Penalties Expense IncomeTaxExaminationPenaltiesExpense	4400000	USD
CY2019	us-gaap	Income Tax Examination Penalties Expense IncomeTaxExaminationPenaltiesExpense	2000000.0	USD
CY2021	lh	Reversalof Accrued Income Tax Penalties And Interest ReversalofAccruedIncomeTaxPenaltiesAndInterest	3400000	USD
CY2020	lh	Reversalof Accrued Income Tax Penalties And Interest ReversalofAccruedIncomeTaxPenaltiesAndInterest	3000000.0	USD
CY2019	lh	Reversalof Accrued Income Tax Penalties And Interest ReversalofAccruedIncomeTaxPenaltiesAndInterest	5800000	USD
CY2021Q4	lh	Accrued Tax Interest Addedfrom Acquisition AccruedTaxInterestAddedfromAcquisition	0.0	USD
CY2020Q4	lh	Accrued Tax Interest Addedfrom Acquisition AccruedTaxInterestAddedfromAcquisition	1400000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	48800000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	31700000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18000000.0	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	31100000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	17300000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	10300000	USD
CY2021	lh	Unrecognized Tax Benefits Increasein Reserve From Acquisition UnrecognizedTaxBenefitsIncreaseinReserveFromAcquisition	0	USD
CY2020	lh	Unrecognized Tax Benefits Increasein Reserve From Acquisition UnrecognizedTaxBenefitsIncreaseinReserveFromAcquisition	8200000	USD
CY2019	lh	Unrecognized Tax Benefits Increasein Reserve From Acquisition UnrecognizedTaxBenefitsIncreaseinReserveFromAcquisition	8400000	USD
CY2021	lh	Unrecognized Tax Benefits Increases Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions	7100000	USD
CY2020	lh	Unrecognized Tax Benefits Increases Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions	300000	USD
CY2019	lh	Unrecognized Tax Benefits Increases Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesDecreasesResultingFromPriorPeriodTaxPositions	800000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	20400000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	8100000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	4200000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	52400000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	48800000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	31700000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	900000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2100000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	0.0	USD
CY2021Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	1291800000	USD
CY2020Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	702400000	USD
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	6800000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	17500000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	27600000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	1700000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	4600000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	6900000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	13400000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	18500000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	24500000	USD
CY2021	lh	Restricted Stock Performance Shares Expense RestrictedStockPerformanceSharesExpense	135400000	USD
CY2020	lh	Restricted Stock Performance Shares Expense RestrictedStockPerformanceSharesExpense	98100000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Grant Date Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValue	62.18
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Grant Date Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValue	40.06
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Grant Date Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValue	33.70
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.006
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.015
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.021
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.286
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.203
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.204
CY2021	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	3600000	USD
CY2020	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	3400000	USD
CY2019	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	5900000	USD
CY2021	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
CY2021	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
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	155200000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y
CY2021Q4	lh	Employee Stock Purchase Plan Number Of Authorized Shares EmployeeStockPurchasePlanNumberOfAuthorizedShares	1800000	shares
CY2021	lh	Employee Stock Purchase Plan Percent Of Market Price EmployeeStockPurchasePlanPercentOfMarketPrice	0.85
CY2021	lh	Employee Stock Purchase Plan Number Of Shares Purchased EmployeeStockPurchasePlanNumberOfSharesPurchased	200000	shares
CY2020	lh	Employee Stock Purchase Plan Number Of Shares Purchased EmployeeStockPurchasePlanNumberOfSharesPurchased	300000	shares
CY2019	lh	Employee Stock Purchase Plan Number Of Shares Purchased EmployeeStockPurchasePlanNumberOfSharesPurchased	200000	shares
CY2021	lh	Employee Stock Purchase Plan Expense EmployeeStockPurchasePlanExpense	14600000	USD
CY2020	lh	Employee Stock Purchase Plan Expense EmployeeStockPurchasePlanExpense	10300000	USD
CY2019	lh	Employee Stock Purchase Plan Expense EmployeeStockPurchasePlanExpense	9900000	USD
CY2021	lh	Employee Stock Purchase Plan Fair Value Employee Purchase Right EmployeeStockPurchasePlanFairValueEmployeePurchaseRight	59.89
CY2020	lh	Employee Stock Purchase Plan Fair Value Employee Purchase Right EmployeeStockPurchasePlanFairValueEmployeePurchaseRight	35.49
CY2019	lh	Employee Stock Purchase Plan Fair Value Employee Purchase Right EmployeeStockPurchasePlanFairValueEmployeePurchaseRight	31.84
CY2021	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-500000	USD
CY2020	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	0	USD
CY2021	lh	Maximumdeferralpercentageofannualcashincentivepay Maximumdeferralpercentageofannualcashincentivepay	1.000
CY2021	lh	Defined Contribution Plan Total Expense DefinedContributionPlanTotalExpense	168900000	USD
CY2020	lh	Defined Contribution Plan Total Expense DefinedContributionPlanTotalExpense	141800000	USD
CY2019	lh	Defined Contribution Plan Total Expense DefinedContributionPlanTotalExpense	139500000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	544600000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	535600000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Current Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsCurrentFiscalYear	19300000	USD
CY2021	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	0	USD
CY2020	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	0	USD
CY2019	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	0	USD
CY2021	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	100000	USD
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	200000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	300000	USD
CY2021	lh	Defined Benefit Plan Amortization And Deferral DefinedBenefitPlanAmortizationAndDeferral	300000	USD
CY2020	lh	Defined Benefit Plan Amortization And Deferral DefinedBenefitPlanAmortizationAndDeferral	400000	USD
CY2019	lh	Defined Benefit Plan Amortization And Deferral DefinedBenefitPlanAmortizationAndDeferral	400000	USD
CY2021	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	400000	USD
CY2020	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	600000	USD
CY2019	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	700000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	800000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	1600000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	6200000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	6500000	USD
CY2021	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	100000	USD
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	200000	USD
CY2021	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	600000	USD
CY2020	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	500000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	5200000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	6200000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	5200000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	6200000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.027
CY2020Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.023
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	700000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	600000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	600000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	500000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	400000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	1300000	USD
CY2020Q4	lh	Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability	89200000	USD
CY2021	lh	Maximumdeferralpercentageofannualbasesalary Maximumdeferralpercentageofannualbasesalary	0.500
CY2021Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	104400000	USD
CY2020Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	89200000	USD
CY2021Q4	lh	Fair Value Liabilities Measured On Recurring Basis Noncontrolling Interest Puts FairValueLiabilitiesMeasuredOnRecurringBasisNoncontrollingInterestPuts	16300000	USD
CY2021Q4	us-gaap	Foreign Currency Contract Asset Fair Value Disclosure ForeignCurrencyContractAssetFairValueDisclosure	32800000	USD
CY2021Q4	us-gaap	Interest Rate Fair Value Hedge Derivative At Fair Value Net InterestRateFairValueHedgeDerivativeAtFairValueNet	2900000	USD
CY2021Q4	us-gaap	Cash Surrender Value Fair Value Disclosure CashSurrenderValueFairValueDisclosure	106400000	USD
CY2021Q4	lh	Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability	104400000	USD
CY2021Q4	lh	Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability	104400000	USD
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	10900000	USD
CY2021Q4	us-gaap	Contingent Consideration Classified As Equity Fair Value Disclosure ContingentConsiderationClassifiedAsEquityFairValueDisclosure	21900000	USD
CY2020Q4	lh	Fair Value Liabilities Measured On Recurring Basis Noncontrolling Interest Puts FairValueLiabilitiesMeasuredOnRecurringBasisNoncontrollingInterestPuts	16200000	USD
CY2020Q4	us-gaap	Foreign Currency Contract Asset Fair Value Disclosure ForeignCurrencyContractAssetFairValueDisclosure	40400000	USD
CY2020Q4	us-gaap	Cash Surrender Value Fair Value Disclosure CashSurrenderValueFairValueDisclosure	90600000	USD
CY2020Q4	lh	Fair Value Liabilities Measured On Recurring Basis Deferred Compensation Liability FairValueLiabilitiesMeasuredOnRecurringBasisDeferredCompensationLiability	89200000	USD
CY2020Q4	us-gaap	Contingent Consideration Classified As Equity Fair Value Disclosure ContingentConsiderationClassifiedAsEquityFairValueDisclosure	13900000	USD
CY2020	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	10800000	USD
CY2020	lh	Contingentconsiderationadjustment Contingentconsiderationadjustment	6800000	USD
CY2021	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	9100000	USD
CY2021	lh	Contingentconsiderationadjustment Contingentconsiderationadjustment	1100000	USD
CY2021	lh	Increase Decrease In Noncontrolling Interest Put IncreaseDecreaseInNoncontrollingInterestPut	200000	USD
CY2021Q4	lh	Senior Notes Fair Value SeniorNotesFairValue	5841100000	USD
CY2020Q4	lh	Senior Notes Fair Value SeniorNotesFairValue	6121800000	USD
CY2021Q4	lh	A270 Senior Notes Due2031 A270SeniorNotesDue2031	500000000.0	USD
CY2021	us-gaap	Debt Instrument Interest Rate Terms DebtInstrumentInterestRateTerms	1.0706
CY2021Q4	us-gaap	Interest Rate Fair Value Hedge Derivative At Fair Value Net InterestRateFairValueHedgeDerivativeAtFairValueNet	2900000	USD
CY2021	us-gaap	Debt Instrument Basis Spread On Variable Rate1 DebtInstrumentBasisSpreadOnVariableRate1	0.02298
CY2021Q4	lh	Balance Of Senior Notes Mature During Q42020 BalanceOfSeniorNotesMatureDuringQ42020	412200000	USD
CY2021Q4	lh	Gain Recognizedon Exitof Interest Rate Swap Arrangement GainRecognizedonExitofInterestRateSwapArrangement	1600000	USD
CY2021	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1 ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1	-32800000	USD
CY2021Q4	lh	Gain Recognizedon Exitof Interest Rate Swap Arrangement GainRecognizedonExitofInterestRateSwapArrangement	1600000	USD
CY2020Q4	lh	Gain Recognizedon Exitof Interest Rate Swap Arrangement GainRecognizedonExitofInterestRateSwapArrangement	1600000	USD
CY2021	lh	Interest Paid In Cash InterestPaidInCash	194700000	USD
CY2020	lh	Interest Paid In Cash InterestPaidInCash	216600000	USD
CY2019	lh	Interest Paid In Cash InterestPaidInCash	248900000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1000000000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	500000000.0	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	216800000	USD
CY2021	lh	Noncashconversionofzerocouponconvertibledebt Noncashconversionofzerocouponconvertibledebt	0	USD
CY2020	lh	Noncashconversionofzerocouponconvertibledebt Noncashconversionofzerocouponconvertibledebt	0	USD
CY2019	lh	Noncashconversionofzerocouponconvertibledebt Noncashconversionofzerocouponconvertibledebt	8400000	USD
CY2021	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	0	USD
CY2020	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	0	USD
CY2019	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	48700000	USD
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	11800000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1200000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2700000	USD
CY2021Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	0	USD
CY2020Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	0	USD
CY2019Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	110000000.0	USD
CY2021	us-gaap	Revenues Revenues	16120900000	USD
CY2020	us-gaap	Revenues Revenues	13978500000	USD
CY2019	us-gaap	Revenues Revenues	11554800000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	3259500000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	2445400000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	1330200000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	745100000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	624700000	USD
CY2019	lh	Depreciationand Amortizationof Intangible Assets DepreciationandAmortizationofIntangibleAssets	564700000	USD
CY2021	us-gaap	Revenues Revenues	16120900000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2815400000	USD

Files In Submission

Name	View Source	Status
0000920148-22-000015-index-headers.html	Edgar Link	pending
0000920148-22-000015-index.html	Edgar Link	pending
0000920148-22-000015.txt	Edgar Link	pending
0000920148-22-000015-xbrl.zip	Edgar Link	pending
exhibit212021.htm	Edgar Link	pending
exhibit2312021.htm	Edgar Link	pending
exhibit2322021.htm	Edgar Link	pending
exhibit2412021.htm	Edgar Link	pending
exhibit2422021.htm	Edgar Link	pending
exhibit2432021.htm	Edgar Link	pending
exhibit2442021.htm	Edgar Link	pending
exhibit2452021.htm	Edgar Link	pending
exhibit2462021.htm	Edgar Link	pending
exhibit2472021.htm	Edgar Link	pending
exhibit2482021.htm	Edgar Link	pending
exhibit2492021.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
lh-20211231.htm	Edgar Link	pending
lh-20211231.xsd	Edgar Link	pending
lh-20211231_cal.xml	Edgar Link	unprocessable
lh-20211231_def.xml	Edgar Link	unprocessable
lh-20211231_g1.jpg	Edgar Link	pending
lh-20211231_g10.jpg	Edgar Link	pending
lh-20211231_g11.jpg	Edgar Link	pending
lh-20211231_g12.jpg	Edgar Link	pending
lh-20211231_g13.jpg	Edgar Link	pending
lh-20211231_g2.jpg	Edgar Link	pending
lh-20211231_g3.jpg	Edgar Link	pending
lh-20211231_g4.jpg	Edgar Link	pending
lh-20211231_g5.jpg	Edgar Link	pending
lh-20211231_g6.jpg	Edgar Link	pending
lh-20211231_g7.jpg	Edgar Link	pending
lh-20211231_g8.jpg	Edgar Link	pending
lh-20211231_g9.jpg	Edgar Link	pending
lh-20211231_htm.xml	Edgar Link	completed
lh-20211231_lab.xml	Edgar Link	unprocessable
lh-20211231_pre.xml	Edgar Link	unprocessable
lh10-kex3112021.htm	Edgar Link	pending
lh10-kex3122021.htm	Edgar Link	pending
lh10-kex322021.htm	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R9999.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$LH
LABCORP HOLDINGS INC. Stock $lh

2021 Q4 Form 10-K Financial Statement

#000092014822000015 Filed on February 25, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$LH LABCORP HOLDINGS INC. Stock $lh

2021 Q4 Form 10-K Financial Statement

#000092014822000015 Filed on February 25, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$LH
LABCORP HOLDINGS INC. Stock $lh