Goodwill and Identifiable Assets Acquired Intangible Assets (Details) - USD ($) $ in Millions		12 Months Ended
	Apr. 02, 2018	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Intangible Assets [Line Items]
Write-off Intangible Asset		$ 3.3
Amortization of intangible assets		51.1		$ 58.5	$ 33.4
Identifiable intangible assets, net		476.5		488.7
Intangible Assets, Gross (Excluding Goodwill)		783.6		745.7
Intangible assets subject to amortization:
Gross Carrying Amount		524.7		483.5
Accumulated Amortization		307.1		257.0
Net Carrying Amount		217.6		226.5
Intangible assets not subject to amortization:
Trademarks, Carrying Amount		258.9	[1]	262.2
Contractual customer relationships
Intangible Assets [Line Items]
Estimated Useful Life	12 years 9 months
Intangible assets subject to amortization:
Gross Carrying Amount		384.9		346.9
Accumulated Amortization		179.9		145.4
Net Carrying Amount		$ 205.0		201.5
Contractual customer relationships | Minimum [Member]
Intangible Assets [Line Items]
Estimated Useful Life		2 months
Contractual customer relationships | Maximum [Member]
Intangible Assets [Line Items]
Estimated Useful Life		12 years 9 months
Contractor relations
Intangible assets subject to amortization:
Gross Carrying Amount		$ 71.1		71.1
Accumulated Amortization		70.6		67.1
Net Carrying Amount		$ 0.5		4.0
Contractor relations | Minimum [Member]
Intangible Assets [Line Items]
Estimated Useful Life		2 years
Contractor relations | Maximum [Member]
Intangible Assets [Line Items]
Estimated Useful Life		5 years
Backlog
Intangible Assets [Line Items]
Estimated Useful Life	2 years 9 months
Intangible assets subject to amortization:
Gross Carrying Amount		$ 25.0		23.1
Accumulated Amortization		23.9		17.7
Net Carrying Amount		$ 1.1		5.4
Backlog | Minimum [Member]
Intangible Assets [Line Items]
Estimated Useful Life		1 year
Backlog | Maximum [Member]
Intangible Assets [Line Items]
Estimated Useful Life		2 years 9 months
Non-compete agreements
Intangible assets subject to amortization:
Gross Carrying Amount		$ 24.8		22.1
Accumulated Amortization		13.8		9.9
Net Carrying Amount		$ 11.0		12.2
Non-compete agreements | Minimum [Member]
Intangible Assets [Line Items]
Estimated Useful Life	4 years	2 years
Non-compete agreements | Maximum [Member]
Intangible Assets [Line Items]
Estimated Useful Life	7 years	7 years
In-use software
Intangible Assets [Line Items]
Estimated Useful Life		6 years
Intangible assets subject to amortization:
Gross Carrying Amount		$ 18.9		18.9
Accumulated Amortization		18.9		16.0
Net Carrying Amount		$ 0.0		2.9
Favorable contracts
Intangible Assets [Line Items]
Estimated Useful Life	5 years	5 years
Intangible assets subject to amortization:
Gross Carrying Amount		$ 0.0		1.4
Accumulated Amortization		0.0		0.9
Net Carrying Amount		$ 0.0		$ 0.5

[1] Certain foreign trademarks totaling $3.3 million were written off during the second quarter of 2019.