Acquisition Acquired Intangible Assets (Details) - Kelway TopCo Limited [Member] $ in Millions	Aug. 01, 2015 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 289.8
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 260.8
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	13 years
Customer Contracts [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 25.9
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Developed Technology Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 1.7
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	2 years
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 1.4
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year