Goodwill And Intangible Assets Disclosure [Line Items]

No definition available.

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- Definition

Percentage fair value exceeds carrying value.

+ References

No definition available.

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- 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.

+ References

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

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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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

+ References

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- Definition

The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

+ References

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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill		$ 0
Goodwill impairment charge		0	$ 395,060,000	$ 17,800,000
Impairment on intangible assets		11,400,000	0	0
Amortization expense on intangible assets		24,000,000.0	$ 19,300,000	$ 17,900,000
Impairment Charges to abandon obsolete intangible technology		$ 11,400,000
Contract Drilling
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill impairment charge	$ 395,000,000
Percentage fair value exceeds carrying values				13.00%
Oilfield Rentals and Electrical Controls and Automation Reporting Unit
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill impairment charge				$ 17,800,000