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Leases - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2017
Lessee, Lease, Description [Line Items]
Lease, renewal term	5 years		5 years
Operating sublease, extension term			4 years
Sublease income	$ 3,600,000	$ 5,300,000	$ 11,900,000	$ 14,800,000
Impairment charges	0	$ 4,000,000.0	2,200,000	$ 12,700,000
Operating lease, not yet commenced, liability	$ 19,200,000		$ 19,200,000
Operating leases, not yet commenced, term of contract	6 years 6 months		6 years 6 months
Corporate Headquarters Lease
Lessee, Lease, Description [Line Items]
Operating lease, term of contract					15 years
Minimum obligations	$ 520,300,000		$ 520,300,000
Corporate Headquarters Lease | Line of Credit | Letter of Credit
Lessee, Lease, Description [Line Items]
Letter of credit	$ 24,100,000		$ 24,100,000
Minimum
Lessee, Lease, Description [Line Items]
Lease, remaining lease term	1 year		1 year
Operating sublease, term			1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease, remaining lease term	13 years		13 years
Operating sublease, term			10 years

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- Definition

Lessee, Operating Lease, Lease Not Yet Commenced, Liability

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Term of lessee's operating lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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