Business Combinations and Asset Acquisitions (Details) - USD ($) $ in Thousands, shares in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020	[1]
Business Acquisition [Line Items]
Contingent Earn-Out Liability, Noncurrent	$ 3,100	$ 0
Payments to Acquire Businesses, Gross	1,900,000
Line of Credit Facility, Maximum Borrowing Capacity	150,000
TotalSeniorSecuredCreditFacility	2,200,000
Term Loan A
Business Acquisition [Line Items]
Secured Long-term Debt, Noncurrent	850,000
Term Loan B
Business Acquisition [Line Items]
Secured Long-term Debt, Noncurrent	850,000
Preconsummation
Business Acquisition [Line Items]
TotalSeniorSecuredCreditFacility	$ 2,000,000
SmithsMedical
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	2.5
Contingent Earn-Out Liability, Noncurrent	$ 100,000
Line of Credit Facility, Maximum Borrowing Capacity	500,000
SmithsMedical | Preconsummation
Business Acquisition [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 300,000

[1] December 31, 2020 balances were derived from audited consolidated financial statements.