Acquisitions Schedule of Intangible Assets Acquired as Part of Business Combination (Details) - ECS $ in Millions	Apr. 02, 2018 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets	$ 195.0
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	11 years
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 16.5
Contractual customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	144.6
Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	23.1
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	10.3
Favorable contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 0.5