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Goodwill and Intangible Assets -Additional Information (Detail) - USD ($) $ in Millions	7 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2018
Goodwill [Line Items]
Goodwill impairment charges			$ 652.0
Intangible assets acquired	$ 10.4	$ 42.5
Amortization expense	189.9	$ 191.2	188.8
Intangible asset impairment charges			$ 580.0
Sales [Member]
Goodwill [Line Items]
Goodwill impairment charges	$ 652.0

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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