Fair Value Measurements - Measured on a Recurring Basis (Details) - USD ($) $ in Millions	Mar. 30, 2024	Jul. 01, 2023
Assets:
Cash and cash equivalents	$ 425.0	$ 859.0
Short-term investments:	445.9	1,154.6
Cash held in bank	287.2	254.3
Certificates of deposit
Assets:
Short-term investments:	1.8	16.5
Commercial paper
Assets:
Short-term investments:	8.2	132.7
Corporate debt securities
Assets:
Short-term investments:	221.7	468.8
U.S. Agency securities
Assets:
Short-term investments:	94.6	206.2
U.S. Treasury securities
Assets:
Short-term investments:	119.6	330.4
Commercial paper
Assets:
Cash and cash equivalents	7.2
Money market funds
Assets:
Cash and cash equivalents	130.6	276.1
U.S. Agency securities
Assets:
Cash and cash equivalents		4.0
U.S. Treasury securities
Assets:
Cash and cash equivalents		324.6
Recurring Basis
Assets:
Total assets	583.7	1,759.3
Recurring Basis | Certificates of deposit
Assets:
Short-term investments:	1.8	16.5
Recurring Basis | Commercial paper
Assets:
Short-term investments:	8.2	132.7
Recurring Basis | Corporate debt securities
Assets:
Short-term investments:	221.7	468.8
Recurring Basis | U.S. Agency securities
Assets:
Short-term investments:	94.6	206.2
Recurring Basis | U.S. Treasury securities
Assets:
Short-term investments:	119.6	330.4
Recurring Basis | Commercial paper
Assets:
Cash and cash equivalents	7.2
Recurring Basis | Money market funds
Assets:
Cash and cash equivalents	130.6	276.1
Recurring Basis | U.S. Agency securities
Assets:
Cash and cash equivalents		4.0
Recurring Basis | U.S. Treasury securities
Assets:
Cash and cash equivalents		324.6
Recurring Basis | Level 1
Assets:
Total assets	250.2	931.1
Recurring Basis | Level 1 | Certificates of deposit
Assets:
Short-term investments:	0.0	0.0
Recurring Basis | Level 1 | Commercial paper
Assets:
Short-term investments:	0.0	0.0
Recurring Basis | Level 1 | Corporate debt securities
Assets:
Short-term investments:	0.0	0.0
Recurring Basis | Level 1 | U.S. Agency securities
Assets:
Short-term investments:	0.0	0.0
Recurring Basis | Level 1 | U.S. Treasury securities
Assets:
Short-term investments:	119.6	330.4
Recurring Basis | Level 1 | Commercial paper
Assets:
Cash and cash equivalents	0.0
Recurring Basis | Level 1 | Money market funds
Assets:
Cash and cash equivalents	130.6	276.1
Recurring Basis | Level 1 | U.S. Agency securities
Assets:
Cash and cash equivalents		0.0
Recurring Basis | Level 1 | U.S. Treasury securities
Assets:
Cash and cash equivalents		324.6
Recurring Basis | Level 2
Assets:
Total assets	333.5	828.2
Recurring Basis | Level 2 | Certificates of deposit
Assets:
Short-term investments:	1.8	16.5
Recurring Basis | Level 2 | Commercial paper
Assets:
Short-term investments:	8.2	132.7
Recurring Basis | Level 2 | Corporate debt securities
Assets:
Short-term investments:	221.7	468.8
Recurring Basis | Level 2 | U.S. Agency securities
Assets:
Short-term investments:	94.6	206.2
Recurring Basis | Level 2 | U.S. Treasury securities
Assets:
Short-term investments:	0.0	0.0
Recurring Basis | Level 2 | Commercial paper
Assets:
Cash and cash equivalents	7.2
Recurring Basis | Level 2 | Money market funds
Assets:
Cash and cash equivalents	0.0	0.0
Recurring Basis | Level 2 | U.S. Agency securities
Assets:
Cash and cash equivalents		4.0
Recurring Basis | Level 2 | U.S. Treasury securities
Assets:
Cash and cash equivalents		0.0
Recurring Basis | Level 3
Assets:
Total assets	0.0	0.0
Recurring Basis | Level 3 | Certificates of deposit
Assets:
Short-term investments:	0.0	0.0
Recurring Basis | Level 3 | Commercial paper
Assets:
Short-term investments:	0.0	0.0
Recurring Basis | Level 3 | Corporate debt securities
Assets:
Short-term investments:	0.0	0.0
Recurring Basis | Level 3 | U.S. Agency securities
Assets:
Short-term investments:	0.0	0.0
Recurring Basis | Level 3 | U.S. Treasury securities
Assets:
Short-term investments:	0.0	0.0
Recurring Basis | Level 3 | Commercial paper
Assets:
Cash and cash equivalents	0.0
Recurring Basis | Level 3 | Money market funds
Assets:
Cash and cash equivalents	$ 0.0	0.0
Recurring Basis | Level 3 | U.S. Agency securities
Assets:
Cash and cash equivalents		0.0
Recurring Basis | Level 3 | U.S. Treasury securities
Assets:
Cash and cash equivalents		$ 0.0