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Commitments and Contingencies - Additional Information (Detail)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
extension
Jan. 07, 2022
USD ($)
$ / shares
Long-term Purchase Commitment [Line Items]    
Contractual commitment, number of extensions | extension 2  
Contractual commitment, period of extensions 1 year  
Contractual commitment to outsource information technology operations, notice period 90 days  
Remaining annual obligations in 2022 $ 33.6  
Remaining annual obligations in 2023 32.6  
Remaining annual obligations in 2024 32.1  
Remaining annual obligations in 2025 15.9  
Contractual obligation, due in 2022 2.3  
Contractual obligation, due in 2023 2.3  
Contractual obligation, due in 2024 $ 2.1  
Apria | Subsequent Event    
Long-term Purchase Commitment [Line Items]    
Share price | $ / shares   $ 37.50
Equity value   $ 1,450.0
Total transaction value   $ 1,600.0