Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Share-based compensation (Expected share-based compensation expense) (Details)

v3.19.3.a.u2
Share-based compensation (Expected share-based compensation expense) (Details)
$ in Millions
Dec. 31, 2019
USD ($)
2020  
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items]  
Expected share-based compensation expense $ 57.1
2021  
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items]  
Expected share-based compensation expense 35.3
2022  
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items]  
Expected share-based compensation expense 16.9
2023  
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items]  
Expected share-based compensation expense 3.2
2024  
Unrecognized Share-Based Compensation, Expected Period Of Recognition [Line Items]  
Expected share-based compensation expense $ 0.5