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Debt - Debt Obligations (Details) - USD ($) | Dec. 31, 2024 | Dec. 11, 2024 | May 31, 2024 | Mar. 31, 2024
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Debt Instrument [Line Items] |  |  |  |
Long-term debt | $ 6,787,700,000 |  |  | $ 6,019,200,000
Less: Debt discount | (17,600,000) |  |  | (13,900,000)
Less: Debt issuance costs | (20,600,000) |  |  | (5,500,000)
Net long-term debt including current maturities | 6,749,500,000 |  |  | 5,999,800,000
Less: Current maturities | 0 |  |  | (999,400,000)
Net long-term debt | 6,749,500,000 |  |  | 5,000,400,000
Senior Indebtedness |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | $ 5,496,000,000 |  |  | 5,309,000,000
Senior Indebtedness | 0.983% 2024 Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Coupon Interest Rate | 0.983% |  |  |
Effective Interest Rate | 1.10% |  |  |
Long-term debt | $ 0 |  |  | 1,000,000,000
Less: Debt discount | 0 |  |  | (400,000)
Less: Debt issuance costs | $ 0 |  |  | (200,000)
Senior Indebtedness | 4.250% 2025 Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Coupon Interest Rate | 4.25% |  |  |
Effective Interest Rate | 4.60% |  |  |
Long-term debt | $ 1,200,000,000 |  |  | 1,200,000,000
Less: Debt discount | (2,100,000) |  |  | (4,400,000)
Less: Debt issuance costs | $ (300,000) |  |  | (600,000)
Senior Indebtedness | 4.900% 2028 Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Coupon Interest Rate | 4.90% |  |  |
Effective Interest Rate | 5.10% |  |  |
Long-term debt | $ 1,000,000,000 |  |  | 0
Less: Debt discount | (3,500,000) | $ (3,600,000) |  | 0
Less: Debt issuance costs | $ (1,800,000) |  |  | 0
Senior Indebtedness | 5.050% 2029 Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Coupon Interest Rate | 5.05% |  |  |
Effective Interest Rate | 5.20% |  |  |
Long-term debt | $ 1,000,000,000 |  |  | 1,000,000,000
Less: Debt discount | (4,500,000) |  |  | (5,200,000)
Less: Debt issuance costs | $ (1,900,000) |  |  | (2,200,000)
Senior Indebtedness | 5.050% 2030 Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Coupon Interest Rate | 5.05% |  |  |
Effective Interest Rate | 5.20% |  |  |
Long-term debt | $ 1,000,000,000 |  |  | 0
Less: Debt discount | (4,300,000) | $ (4,300,000) |  | 0
Less: Debt issuance costs | (1,800,000) |  |  | 0
Commercial Paper |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | 1,296,000,000 |  |  | 1,359,000,000
Less: Debt discount | (3,200,000) |  |  | (3,900,000)
Term Loan Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | 0 |  |  | 750,000,000.0
Less: Debt issuance costs | 0 |  |  | (700,000)
Convertible Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | $ 1,291,700,000 |  |  | 710,200,000
Senior Subordinated Convertible Debt | 2015 Senior Convertible Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Coupon Interest Rate | 1.625% |  |  |
Effective Interest Rate | 1.80% |  |  |
Long-term debt | $ 3,700,000 |  |  | 6,700,000
Senior Subordinated Convertible Debt | 2017 Senior Convertible Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Coupon Interest Rate | 1.625% |  |  |
Effective Interest Rate | 1.80% |  |  |
Long-term debt | $ 38,000,000.0 |  |  | 38,000,000.0
Less: Debt issuance costs | $ (100,000) |  |  | (100,000)
Senior Subordinated Convertible Debt | 2020 Senior Convertible Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Coupon Interest Rate | 0.125% |  |  |
Effective Interest Rate | 0.50% |  |  |
Long-term debt | $ 0 |  |  | 665,500,000
Less: Debt issuance costs | $ 0 |  |  | (1,700,000)
Senior Subordinated Convertible Debt | 2024 Senior Convertible Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Coupon Interest Rate | 0.75% |  |  |
Effective Interest Rate | 1.00% |  |  |
Long-term debt | $ 1,250,000,000 |  |  | 0
Less: Debt issuance costs | (14,700,000) |  | $ (16,500,000) | 0
Line of credit | Amended and Restated Credit Agreement | Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | $ 0 |  |  | $ 0
Maximum leverage ratio | 4.75 |  |  |

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