Other Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Other assets
Investments in affiliated companies (Note 7)	$ 264.4	$ 240.5
Right-of-use lease assets	141.2	145.1
Interest rate swaps (Notes 6 and 10)	168.8	12.1
Other	63.3	61.3
Total other assets	$ 637.7	$ 459.0