Business and Summary of Significant Accounting Policies - CARES Act and Other Governmental Grants and Medicare Accelerated Payments - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
Summary Of Business And Significant Accounting Policies [Line Items]
Additional funds received from government by CARES Act	$ 189
Medicare Accelerated and Advance Payment Program
Summary Of Business And Significant Accounting Policies [Line Items]
Medicare accelerated payments received	$ 695