Other Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Interest rate swaps and caps (Notes 2 and 8)	$ 99.5	$ 46.6
Operating lease liabilities	54.8	57.2
Unrecognized tax benefits, net of indirect tax effects (Note 12)	36.6	32.8
Non-qualified and other employee benefit plan liabilities	10.9	11.6
Deferred revenue (Note 10)	5.6	15.7
Other Noncurrent Other Liabilities	17.6	1.1
Total other liabilities	$ 225.0	$ 165.0