Acquisition (Definite-lived intangible assets acquired) (Details) - Starbucks Coffee Japan Ltd Member $ in Millions	Jun. 28, 2015 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 281.9
Accumulated amortization	(28.8)
Net carrying amount	253.1
Reacquired Rights
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	266.2
Accumulated amortization	(27.6)
Net carrying amount	238.6
Licensing Agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	13.1
Accumulated amortization	(0.8)
Net carrying amount	12.3
Customer Loyalty Program
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	2.6
Accumulated amortization	(0.4)
Net carrying amount	$ 2.2