Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value (Details) - Recurring - USD ($) $ in Millions	Jun. 16, 2018	Feb. 24, 2018
Assets:
Short-term investments	$ 23.4	$ 24.5
Non-current investments	93.7	91.2
Derivative contracts	2.5
Total	760.6	313.7
Liabilities:
Derivative contracts		11.8
Contingent consideration	58.4	60.0
Total	58.4	71.8
Quoted prices in active markets for identical assets (Level 1)
Assets:
Short-term investments	21.4	22.1
Non-current investments	41.6	40.2
Derivative contracts	0.0
Total	704.0	260.3
Liabilities:
Derivative contracts		0.0
Contingent consideration	0.0	0.0
Total	0.0	0.0
Significant observable inputs (Level 2)
Assets:
Short-term investments	2.0	2.4
Non-current investments	52.1	51.0
Derivative contracts	2.5
Total	56.6	53.4
Liabilities:
Derivative contracts		11.8
Contingent consideration	0.0	0.0
Total	0.0	11.8
Significant unobservable inputs (Level 3)
Assets:
Short-term investments	0.0	0.0
Non-current investments	0.0	0.0
Derivative contracts	0.0
Total	0.0	0.0
Liabilities:
Derivative contracts		0.0
Contingent consideration	58.4	60.0
Total	58.4	60.0
Money market
Assets:
Money market	641.0	198.0
Money market | Quoted prices in active markets for identical assets (Level 1)
Assets:
Money market	641.0	198.0
Money market | Significant observable inputs (Level 2)
Assets:
Money market	0.0	0.0
Money market | Significant unobservable inputs (Level 3)
Assets:
Money market	$ 0.0	$ 0.0