Relationship with Universal Health Realty Income Trust and Other Related Party Transactions - Additional Information (Detail)	3 Months Ended									12 Months Ended
	Dec. 31, 2019 USD ($) Facility	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2013	Dec. 31, 2019 USD ($) Hospital Facility Bed SquareFoot Lease	Dec. 31, 2018 USD ($) Hospital	Dec. 31, 2017 USD ($) Hospital
Related Party Transaction [Line Items]
Net revenues	$ 2,896,247,000	$ 2,822,453,000	$ 2,855,168,000	$ 2,804,391,000	$ 2,754,496,000	$ 2,648,913,000	$ 2,681,353,000	$ 2,687,516,000		$ 11,378,259,000	$ 10,772,278,000	$ 10,409,865,000
Number of hospital facilities | Hospital										3
Chief Executive Officer
Related Party Transaction [Line Items]
Estimated payments to acquire life insurance policies										$ 28,000,000
Payments to acquire life insurance policies, net										1,100,000	$ 1,100,000	$ 1,200,000
Chief Executive Officer | Trust Owned by CEO
Related Party Transaction [Line Items]
Estimated payments to acquire life insurance policies										$ 9,000,000
Joint Venture Agreement
Related Party Transaction [Line Items]
Lease initial terms	20 years									20 years
Lease renewal period, years										10 years
Number of beds | Bed										108
Number of triple net lease | Lease										5
Number of square feet to be constructed | SquareFoot										80,000
Expected aggregate fee										$ 750,000
Estimated project cost										37,500,000
Estimated initial annual rent										$ 2,700,000
Expected project to begin and be completed year										2020
Minimum
Related Party Transaction [Line Items]
Lease initial terms	5 years									5 years
Minimum | Chief Executive Officer
Related Party Transaction [Line Items]
Estimated death benefit proceeds										$ 37,000,000
Maximum
Related Party Transaction [Line Items]
Lease initial terms	10 years									10 years
Relationship with Universal Health Realty Income Trust
Related Party Transaction [Line Items]
Trust outstanding shares held, percentage	5.70%									5.70%
Percentage of annual incentive fee										20.00%
Percentage of advisory fee on average invested real estate assets										0.70%	0.70%	0.70%
Pre-tax share of income from the Trust										$ 1,100,000	$ 1,400,000	$ 2,600,000
Dividends received from the Trust										2,100,000	2,100,000	2,100,000
Carrying value of investment in Trust	$ 6,400,000				7,500,000					6,400,000	7,500,000
Market value of investment in Trust	$ 92,400,000				$ 48,300,000					$ 92,400,000	48,300,000
Lease initial terms	10 years									10 years
Lease renewal period, years										5 years
Rent expense under operating leases										$ 16,400,000	$ 16,000,000.0	$ 16,000,000.0
Number of hospital facilities | Hospital										3	3	3
Notice period on renewal of lease										90 days
Period of rights of refusal to leased facilities										180 days
Number of free-standing emergency departments to be acquired | Facility	2									2
Number of square feet to be constructed | SquareFoot										75,000
Percentage of master lease rentable square feet										50.00%
Annual Minimum Rent										$ 644,000,000
Relationship with Universal Health Realty Income Trust | Minimum
Related Party Transaction [Line Items]
Lease initial terms	13 years									13 years
Relationship with Universal Health Realty Income Trust | Minimum | Limited Liability Companies
Related Party Transaction [Line Items]
Non-controlling ownership interests by subsidiaries	95.00%									95.00%
Relationship with Universal Health Realty Income Trust | Maximum
Related Party Transaction [Line Items]
Lease initial terms	15 years									15 years
Relationship with Universal Health Realty Income Trust | Maximum | Limited Liability Companies
Related Party Transaction [Line Items]
Non-controlling ownership interests by subsidiaries	100.00%									100.00%
Relationship with Universal Health Realty Income Trust | Advisory Fee
Related Party Transaction [Line Items]
Net revenues										$ 4,000,000.0	$ 3,800,000	$ 3,600,000
Premier, Inc. | Other (Income) Expense, Net | ASU 2016-01
Related Party Transaction [Line Items]
Unrealized gain										4,000,000	4,000,000
Premier, Inc. | Group Purchasing Organization Agreement | Restricted Stock
Related Party Transaction [Line Items]
Shares vesting period									7 years
Shares vesting period start year									2014
Shares vesting period end year									2020
Market value of retained vested shares										70,000,000	56,000,000
Unrealized gain										14,000,000
Additional vested shares, value										$ 10,000,000	$ 10,000,000