Goodwill and Intangible Assets (Narrative) (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($) segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Number of reporting units | segment	8
Intangible assets, net	$ 534.4	$ 505.1	$ 481.8
Intangibles with indefinite useful lives	69.7	$ 69.9
Estimated amortization expense for intangible assets, current year	22.5
Finite-Lived Intangible Assets, Amortization Expense, Year Two	42.2
Finite-Lived Intangible Assets, Amortization Expense, Year Three	41.8
Finite-Lived Intangible Assets, Amortization Expense, Year Four	41.6
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 316.6