Amount of increase (decrease) in additional paid-in capital (APIC) from recognition of substantial premium at which convertible debt instrument is issued.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

Debt - Schedule of Long-term Debt (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions							3 Months Ended	9 Months Ended	12 Months Ended
	Jun. 23, 2026	Mar. 26, 2026	Mar. 23, 2026	Dec. 23, 2025	Dec. 22, 2025	Sep. 29, 2025	Sep. 29, 2025	Jun. 28, 2026	Jun. 28, 2026	Jun. 29, 2025	Jun. 30, 2024
Debt Instrument [Line Items]
Long-term debt								$ 2,469.6	$ 2,469.6	$ 6,325.0
Repayment of principal									(623.3)	0.0
Conversion to common stock									(64.3)	0.0
Outstanding principal								1,782.0	1,782.0	6,658.2
Unamortized discount and issuance costs								(94.5)	(94.5)	(120.2)
Ending Balance								1,687.5	1,687.5	6,538.0
Equity component								224.0	224.0	0.0
Fair Value								3,465.8	3,465.8	2,646.3
Repayments of senior debt							$ 308.5	0.0		0.0	$ 0.0
Paid-in-kind interest on long-term debt							0.0	27.8		$ 83.2	$ 0.0
Substantial premium on 2L Convertible Notes							168.8
Embedded Derivative
Debt Instrument [Line Items]
Reclassification to equity								$ 87.9	$ 87.9
Additional Paid-in Capital
Debt Instrument [Line Items]
Substantial premium on 2L Convertible Notes						$ 168.8	$ 168.8
Convertible Notes \| 1.75% Convertible Notes
Debt Instrument [Line Items]
Effective interest rate (as a percent)										2.20%
Long-term debt										$ 575.0
Repayment of principal										0.0
Conversion to common stock										0.0
Outstanding principal										575.0
Unamortized discount and issuance costs										(2.0)
Ending Balance										573.0
Equity component										0.0
Fair Value										$ 145.2
Stated interest rate (as a percent)								1.75%	1.75%
Convertible Notes \| 0.25% Convertible Notes
Debt Instrument [Line Items]
Effective interest rate (as a percent)										0.60%
Long-term debt										$ 750.0
Repayment of principal										0.0
Conversion to common stock										0.0
Outstanding principal										750.0
Unamortized discount and issuance costs										(7.9)
Ending Balance										742.1
Equity component										0.0
Fair Value										$ 185.6
Stated interest rate (as a percent)								0.25%	0.25%
Convertible Notes \| 1.875% Convertible Notes
Debt Instrument [Line Items]
Effective interest rate (as a percent)										2.10%
Long-term debt										$ 1,750.0
Repayment of principal										0.0
Conversion to common stock										0.0
Outstanding principal										1,750.0
Unamortized discount and issuance costs										(20.7)
Ending Balance										1,729.3
Equity component										0.0
Fair Value										$ 450.6
Stated interest rate (as a percent)								1.875%	1.875%
Convertible Notes \| New Senior Secured Notes
Debt Instrument [Line Items]
Debt instrument, repurchased face amount		$ 475.9
Repayments of senior debt		$ 524.3
Convertible Notes \| New 2L Non-Renesas Convertible Notes
Debt Instrument [Line Items]
Effective interest rate (as a percent)								3.00%	3.00%
Long-term debt								$ 331.4	$ 331.4
Repayment of principal									0.0
Conversion to common stock									(64.3)
Outstanding principal								267.1	267.1
Unamortized discount and issuance costs								(5.6)	(5.6)
Ending Balance								261.5	261.5
Equity component								136.1	136.1
Fair Value								$ 1,059.5	$ 1,059.5
Stated interest rate (as a percent)						2.50%	2.50%
Conversion price (USD per share)						$ 12.23	$ 12.23
Debt conversion, converted instrument, shares issued (in shares)									5.3
Convertible Notes \| New 2L Renesas Convertible Notes
Debt Instrument [Line Items]
Effective interest rate (as a percent)								12.30%	12.30%
Long-term debt								$ 203.6	$ 203.6
Repayment of principal									0.0
Conversion to common stock									0.0
Outstanding principal								203.6	203.6
Unamortized discount and issuance costs								(74.0)	(74.0)
Ending Balance								129.6	129.6
Equity component								87.9	87.9
Fair Value								$ 517.8	$ 517.8
Stated interest rate (as a percent)						2.50%	2.50%
Conversion price (USD per share)						$ 18.35	$ 18.35
Convertible Notes \| 1.5 Convertible Notes
Debt Instrument [Line Items]
Effective interest rate (as a percent)		3.50%						4.30%	4.30%
Long-term debt								$ 379.0	$ 379.0
Repayment of principal									0.0
Conversion to common stock									0.0
Outstanding principal								379.0	379.0
Unamortized discount and issuance costs								(13.6)	(13.6)
Ending Balance								365.4	365.4
Equity component								0.0	0.0
Fair Value								$ 913.8	$ 913.8
Stated interest rate (as a percent)		3.50%
Conversion price (USD per share)		$ 20.14
Convertible Notes \| 2L Convertible Notes
Debt Instrument [Line Items]
Percentage of equity component not related to outstanding debt due to conversions								19.40%	19.40%
Senior Notes \| 2030 Senior Notes
Debt Instrument [Line Items]
Effective interest rate (as a percent)										16.30%
Long-term debt										$ 1,250.0
Repayment of principal										0.0
Conversion to common stock										0.0
Outstanding principal										1,521.2
Unamortized discount and issuance costs										(52.3)
Ending Balance										1,468.9
Equity component										0.0
Fair Value										$ 1,308.2
Senior Notes \| New Senior Secured Notes
Debt Instrument [Line Items]
Effective interest rate (as a percent)								12.90%	12.90%
Long-term debt								$ 1,259.2	$ 1,259.2
Repayment of principal									(623.3)
Conversion to common stock									0.0
Outstanding principal								635.9	635.9
Unamortized discount and issuance costs								59.2	59.2
Ending Balance								695.1	695.1
Equity component								0.0	0.0
Fair Value								$ 705.7	$ 705.7
Debt instrument, repurchased face amount					$ 175.0
Repayments of senior debt					$ 197.9
Paid-in-kind interest on long-term debt	$ 6.4		$ 10.9	$ 10.2
Senior Notes \| New 2L Non-Convertible Notes
Debt Instrument [Line Items]
Effective interest rate (as a percent)						7.00%	7.00%	12.50%	12.50%
Long-term debt								$ 296.4	$ 296.4
Repayment of principal									0.0
Conversion to common stock									0.0
Outstanding principal								296.4	296.4
Unamortized discount and issuance costs								(60.5)	(60.5)
Ending Balance								235.9	235.9
Equity component								0.0	0.0
Fair Value								$ 269.0	$ 269.0
Unsecured Debt \| CRD Agreement Deposits
Debt Instrument [Line Items]
Effective interest rate (as a percent)										6.80%
Long-term debt										$ 2,000.0
Repayment of principal										0.0
Conversion to common stock										0.0
Outstanding principal										2,062.0
Unamortized discount and issuance costs										(37.3)
Ending Balance										2,024.7
Equity component										0.0
Fair Value										$ 556.7