Annual report pursuant to Section 13 and 15(d)

Leases - Summary of Lease Assets and Liabilities Recognized Within Consolidated Balance Sheets (Detail)

v3.20.4
Leases - Summary of Lease Assets and Liabilities Recognized Within Consolidated Balance Sheets (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
ASSETS    
Operating lease right-of-use assets $ 222.8 $ 189.5
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:OperatingLeaseRightOfUseAsset  
Finance lease right-of-use assets $ 0.5 1.0
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:PropertyPlantAndEquipmentNet  
Total lease assets $ 223.3 190.5
Current liabilities:    
Operating lease liabilities $ 35.5 $ 37.4
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesCurrent us-gaap:OtherLiabilitiesCurrent
Finance lease liabilities $ 0.2 $ 0.6
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:LongTermDebtCurrent  
Non-current:    
Non-current operating lease liabilities $ 206.7 169.9
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OperatingLeaseLiabilityNoncurrent  
Finance lease liabilities $ 0.3 0.5
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:LongTermDebtNoncurrent  
Total lease liabilities $ 242.7 $ 208.4