XML 257 R208.htm IDEA: XBRL DOCUMENT v3.22.0.1

Employee benefits - Additional information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Transfers Between Level 1 and Level 2, Description and Policy [Abstract]
Transfers in or out of Level 1	$ 0	$ 0
Transfers in or out of Level 2	0	0
Transfers in or out of Level 3	0	0
Savings Plans
Fair Value, Transfers Between Level 1 and Level 2, Description and Policy [Abstract]
Savings Plans	105,000,000	77,000,000
Savings Plans Contributions	$ 13,300,000	$ 14,000,000.0	$ 15,100,000
Savings Plans Stocks Held	1,279,982	1,362,593

X

- Definition

Value of stock in an investment or savings plan established by the entity for the benefit of its employees that permits the employees to make investment decisions.

+ References

No definition available.

+ Details

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Balance Type:	credit
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X

- Definition

The amount of cash or cash equivalents contributed by the entity to fund its savings plans.

+ References

No definition available.

+ Details

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X

- Definition

Number of shares of stock held by the plan.

+ References

No definition available.

+ Details

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X

- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan, for assets transferred into (out of) Level 3 of fair value hierarchy. Includes, but is not limited to, transfer due to change in observability of significant inputs.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(iv)(02)(C)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921

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Period Type:	duration

X

- Definition

Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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- Definition

Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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- References

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