Basis of Presentation - Narrative (Details) - USD ($)						3 Months Ended		9 Months Ended
	Jun. 28, 2021	Jun. 17, 2021	Jan. 26, 2021	Nov. 17, 2020	Sep. 25, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Aug. 31, 2021	Aug. 28, 2020
Subsidiary, Sale of Stock [Line Items]
Net cash paid								$ 1,033,695,000	$ 68,920,000
Payments of debt issuance costs								5,643,000	432,000
Deferred compensation plan						$ 88,965,000	$ 50,000	89,327,000	(115,000)
Net proceeds received								0	58,349,000
Dividends payable (USD per share)											$ 1.50
Dividends payable											$ 392,489,000
Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits | Nonqualified Plan
Subsidiary, Sale of Stock [Line Items]
Deferred compensation plan						88,965,000	$ 50,000	89,327,000	$ (115,000)
Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits | Nonqualified Plan | DCP, One-Time Inducement
Subsidiary, Sale of Stock [Line Items]
Reclassified cumulative compensation cost						4,739,000		4,739,000
Deferred compensation plan						90,721,000		90,721,000
Deferred compensation liability						$ 95,460,000		$ 95,460,000
Seequent
Subsidiary, Sale of Stock [Line Items]
Net cash paid		$ 910,997,000
Class B Common Stock | Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits | Nonqualified Plan
Subsidiary, Sale of Stock [Line Items]
Phantom shares, maximum elections (in shares)										1,500,000
Reduction in shares outstanding, basic (in shares)										1,500,000
Reduction in shares outstanding, diluted (in shares)										1,500,000
Class B Common Stock | Seequent
Subsidiary, Sale of Stock [Line Items]
Number of shares sold (in shares)		3,141,342
Class B Common Stock | Public Stock Offering - Shares From Existing Shareholders
Subsidiary, Sale of Stock [Line Items]
Number of shares sold (in shares)					12,360,991
Price per share sold (USD per share)					$ 22.00
Class B Common Stock | Follow-On Offering
Subsidiary, Sale of Stock [Line Items]
Number of shares sold (in shares)				11,500,000
Price per share sold (USD per share)				$ 32.00
Class B Common Stock | Follow-On Offering, Sold By Company
Subsidiary, Sale of Stock [Line Items]
Number of shares sold (in shares)				9,603,965
Class B Common Stock | Follow-On Offering, Exercise By Underwriters
Subsidiary, Sale of Stock [Line Items]
Number of shares sold (in shares)				1,500,000
Class B Common Stock | Follow-On Offering, Shares From Existing Shareholders
Subsidiary, Sale of Stock [Line Items]
Number of shares sold (in shares)				1,896,035
Net proceeds received				$ 294,429,000
Expenses associated with sale of stock				$ 12,898,000
2026 Notes: | Convertible Debt
Subsidiary, Sale of Stock [Line Items]
Debt instrument, face amount			$ 690,000,000
Debt instrument, interest rate, stated percentage			0.125%
Payments of debt issuance costs			$ 18,055,000
Payments of expenses associated with initial public offering			$ 25,530,000
2027 Notes: | Convertible Debt
Subsidiary, Sale of Stock [Line Items]
Debt instrument, face amount	$ 575,000,000
Debt instrument, interest rate, stated percentage	0.375%
Payments of debt issuance costs	$ 15,065,000
Payments of expenses associated with initial public offering	$ 25,875,000