Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands		12 Months Ended
	Feb. 26, 2021	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets		$ (2,206,899)	$ (1,866,363)
Gross Carrying Amount		63,000	67,300
Net Carrying Value		63,000	67,300
Gross Carrying Amount		5,147,100	5,151,400
Net Carrying Value		$ 2,940,201	3,285,037
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period	16 years	15 years
Gross Carrying Amount		$ 4,178,280	4,178,280
Amortization of intangible assets		(1,810,880)	(1,531,679)
Net Carrying Value		$ 2,367,400	2,646,601
Provider Network
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period		15 years
Gross Carrying Amount		$ 896,800	896,800
Amortization of intangible assets		(392,599)	(332,812)
Net Carrying Value		$ 504,201	563,988
Technology
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period		5 years
Gross Carrying Amount		$ 6,350	6,350
Amortization of intangible assets		(2,752)	(1,482)
Net Carrying Value		$ 3,598	4,868
Trade Names
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period	10 years	9 years
Gross Carrying Amount		$ 2,670	2,670
Amortization of intangible assets		(668)	(390)
Net Carrying Value		$ 2,002	$ 2,280