Fair Value Measurements - Summary of Fair and Carrying Value of Debt Instruments (Details) - USD ($) $ in Millions	1 Months Ended
	Sep. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Feb. 28, 2021	Dec. 31, 2020
Debt Instrument
Interest rate on senior notes		3.625%
Senior Notes
Debt Instrument
Notes payable, fair value		$ 5,437.2	$ 6,287.7
2023 Term Loan 364-day tranche | Senior Notes
Debt Instrument
Notes payable, current, fair value disclosure		$ 0.0	150.0
4.050% Senior Notes due September 15, 2025
Debt Instrument
Interest rate on senior notes		4.05%
4.050% Senior Notes due September 15, 2025 | Senior Notes
Debt Instrument
Notes payable, current, fair value disclosure		$ 1,741.0	0.0
Interest rate on senior notes		4.05%
Notes payable, fair value		$ 0.0	1,721.5
Current portion of notes payable and term loan | Senior Notes
Debt Instrument
Notes payable, current, fair value disclosure		1,741.0	150.0
2023 Term Loan three-year tranche | Senior Notes
Debt Instrument
Notes payable, fair value		$ 0.0	500.0
2.250% Senior Notes due May 1, 2030
Debt Instrument
Interest rate on senior notes		2.25%
2.250% Senior Notes due May 1, 2030 | Senior Notes
Debt Instrument
Interest rate on senior notes					2.25%
Notes payable, fair value		$ 1,295.6	1,279.3
5.200% Senior Notes due September 15, 2045
Debt Instrument
Interest rate on senior notes		5.20%
5.200% Senior Notes due September 15, 2045 | Senior Notes
Debt Instrument
Interest rate on senior notes		5.20%
Notes payable, fair value		$ 1,008.0	1,089.7
3.150% Senior Notes due May 1, 2050
Debt Instrument
Interest rate on senior notes		3.15%
3.150% Senior Notes due May 1, 2050 | Senior Notes
Debt Instrument
Interest rate on senior notes					3.15%
Notes payable, fair value		$ 943.7	1,049.0
3.250% Senior Notes due February 15, 2051
Debt Instrument
Interest rate on senior notes		3.25%
3.250% Senior Notes due February 15, 2051 | Senior Notes
Debt Instrument
Interest rate on senior notes				3.25%
Notes payable, fair value		$ 448.9	498.2
Non-current portion of notes payable and term loan | Senior Notes
Debt Instrument
Notes payable, fair value		$ 3,696.2	$ 6,137.7
2023 Term Loan | Line of Credit | Reata Pharmaceuticals, Inc
Debt Instrument
Proceeds from long-term lines of credit	$ 1,000.0
2023 Term Loan | Line of Credit | Reata Pharmaceuticals, Inc | 2023 Term Loan 364-day tranche
Debt Instrument
Proceeds from long-term lines of credit	500.0
2023 Term Loan | Line of Credit | Reata Pharmaceuticals, Inc | 2023 Term Loan three-year tranche
Debt Instrument
Proceeds from long-term lines of credit	$ 500.0