Other Noncurrent Assets (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Identifiable intangible assets (net of accumulated amortization of $315.5 million, $277.5 million, and $286.9 million, respectively)	$ 487,769,000	$ 519,861,000	$ 487,769,000	$ 519,861,000	$ 518,190,000
Deferred income taxes	579,950,000	60,850,000	579,950,000	60,850,000	72,682,000
Identifiable intangible assets, accumulated amortization	315,500,000	277,500,000	315,500,000	277,500,000	$ 286,900,000
Impairment of intangible assets	0	0	0	0
Discrete tax benefit	$ 465,300,000	$ (1,700,000)	$ 445,800,000	$ (11,400,000)