Debt - Narrative (Details)					1 Months Ended			3 Months Ended	9 Months Ended	79 Months Ended
	Sep. 20, 2024 JPY (¥)	Aug. 31, 2024 JPY (¥)	Mar. 15, 2024 USD ($)	Jun. 16, 2023 USD ($) trading_day $ / shares Rate	Mar. 31, 2022 USD ($) trading_day $ / shares Rate	Dec. 31, 2019 USD ($) trading_day $ / shares Rate	Mar. 31, 2017 USD ($) trading_day $ / shares Rate	Sep. 28, 2024 USD ($) day $ / shares	Mar. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Aug. 09, 2024 JPY (¥)	Jun. 29, 2024 USD ($)	Mar. 08, 2017 USD ($)
Debt Instrument
Current portion of long-term debt								$ 10,800,000				$ 0
Long-term portion								2,569,200,000				2,503,200,000
Additional Paid-In Capital
Debt Instrument
Adjustments to additional paid in capital, equity component of reacquired notes									$ 13,500,000
Convertible Debt
Debt Instrument
Principal								2,514,700,000				2,514,700,000
Discount								10,800,000				11,500,000
Total payments								2,594,800,000
2029 Notes | Convertible Debt
Debt Instrument
Principal				$ 603,700,000				$ 603,700,000				603,700,000
Debt interest rate (as a percent)				1.50%
Proceeds from the issuance of 2028 Notes, net of issuance costs				$ 599,400,000
Payments of debt issuance costs				4,300,000
Debt related professional fees				800,000
Payment for repurchase of convertible notes				132,800,000
Repurchase of common stock				$ 125,000,000
Debt instrument conversion ratio | Rate				1.43808%
Number of days to trigger conversion				20				20
Conversion threshold consecutive trading days (in days)				30				30
Conversion threshold percentage of stock price trigger (as a percent)				130.00%				130.00%
Conversion threshold measurement period				5 years
Conversion threshold percentage of conversion rate from measurement period (as a percent)				98.00%
Percentage of principal amount required to be paid upon contingent note repurchase (as a percent)				100.00%
Debt instrument redemption threshold				$ 100,000,000
Conversion price (in usd per share) | $ / shares				$ 69.54				$ 69.54
Sale price of common stock (in usd per share) | $ / shares								$ 90.40
Discount								$ 4,100,000				4,300,000
Total payments								653,500,000
2028 Notes | Convertible Debt
Debt Instrument
Principal					$ 861,000,000			$ 861,000,000.0				861,000,000.0
Debt interest rate (as a percent)					0.50%
Proceeds from the issuance of 2028 Notes, net of issuance costs					$ 854,800,000
Payments of debt issuance costs					6,200,000
Debt related professional fees					700,000
Repurchase of common stock					$ 200,000,000
Debt instrument conversion ratio | Rate					0.76319%
Number of days to trigger conversion					20			20
Conversion threshold consecutive trading days (in days)					30			30
Conversion threshold percentage of stock price trigger (as a percent)					130.00%			130.00%
Conversion threshold measurement period					5 days
Conversion threshold percentage of conversion rate from measurement period (as a percent)					98.00%
Percentage of principal amount required to be paid upon contingent note repurchase (as a percent)					100.00%
Debt instrument redemption threshold					$ 100,000,000
Conversion price (in usd per share) | $ / shares					$ 131.03			$ 131.03
Sale price of common stock (in usd per share) | $ / shares					$ 170.34			$ 170.34
Liability component					$ 629,800,000
Effective interest rate percentage (as a percent)					5.70%
Discount					$ 231,200,000			$ 4,100,000				4,400,000
Total payments								878,200,000
2026 Notes
Debt Instrument
Sale price of common stock (in usd per share) | $ / shares						$ 129.08
2026 Notes | Convertible Debt
Debt Instrument
Principal						$ 1,050,000,000		$ 1,050,000,000				1,050,000,000
Debt interest rate (as a percent)						0.50%
Repurchase of common stock						$ 200,000,000.0
Debt instrument conversion ratio | Rate						1.00711%
Number of days to trigger conversion | day								20
Conversion threshold consecutive trading days (in days)						30		30
Conversion threshold percentage of stock price trigger (as a percent)						130.00%		130.00%
Conversion threshold measurement period						5 days
Conversion threshold percentage of conversion rate from measurement period (as a percent)						98.00%
Percentage of principal amount required to be paid upon contingent note repurchase (as a percent)						100.00%
Conversion price (in usd per share) | $ / shares						$ 99.29		$ 99.29
Sale price of common stock (in usd per share) | $ / shares								$ 129.08
Liability component						$ 734,800,000
Effective interest rate percentage (as a percent)						5.80%
Discount						$ 315,200,000		$ 2,600,000				$ 2,800,000
Repayments of debt						$ 196,000,000.0
Conversion threshold trading days | trading_day						20
Total payments								1,063,100,000
2024 Notes | Convertible Debt
Debt Instrument
Principal				$ 125,000,000			$ 450,000,000.0
Debt interest rate (as a percent)							0.25%
Debt instrument conversion ratio | Rate							1.64965%
Conversion threshold consecutive trading days (in days) | trading_day							30
Conversion threshold percentage of stock price trigger (as a percent)							130.00%
Conversion threshold measurement period							5 days
Conversion threshold percentage of conversion rate from measurement period (as a percent)							98.00%
Percentage of principal amount required to be paid upon contingent note repurchase (as a percent)							100.00%
Conversion price (in usd per share) | $ / shares							$ 60.62
Sale price of common stock (in usd per share) | $ / shares							$ 78.80
Conversion threshold trading days | trading_day							20
Derivative liability fair value													$ 129,900,000
Residual principal amount of notes before issuance costs													320,100,000
Debt issuance costs													$ 7,700,000
Effective interest rate on the liability component													5.40%
Principal amount of debt converted (less than)								100,000		$ 1,900,000
Repayments of convertible debt			$ 323,100,000
Sumitomo Mitsui Banking Corporation | Secured Debt
Debt Instrument
Principal | ¥		¥ 53,300,000									¥ 6,400,000,000
Debt interest rate (as a percent)		0.88%
Periodic principal payment | ¥		¥ 3,100,000,000
Total payments		¥ 3,300,000,000						44,500,000
Current portion of long-term debt								4,500,000
Long-term portion								40,000,000
Mizuho Term Loan | Secured Debt
Debt Instrument
Principal | ¥	¥ 4,500,000,000
Debt interest rate (as a percent)	0.90%
Periodic principal payment | ¥	¥ 225,000,000
Total payments								31,600,000
Current portion of long-term debt								6,300,000
Long-term portion								$ 25,300,000
Debt instrument term	5 years