New Accounting Standards Financing Receivable, Allowance for Credit Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Trade receivable, net
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts Receivable, Allowance for Credit Loss	$ 100.8	$ 99.2
Accounts Receivable, Credit Loss Expense (Reversal)	3.7
Accounts Receivable, Allowance for Credit Loss, Writeoff	0.8
Accounts Receivable, Allowance for Credit Loss, Recovery	1.3
Loans receivable, net
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	9.0	9.5
Financing Receivable, Credit Loss, Expense (Reversal)	(0.5)
Allowance for Loan and Lease Losses, Write-offs	0.0
Allowance for Loan and Lease Loss, Recovery of Bad Debts	0.0
Security deposit and other, net
Financing Receivable, Allowance for Credit Loss [Line Items]
Security Deposits and Other, Allowance for Credit Losses	1.4	1.6
Security Deposit and Other Credit Loss Expense (Reversal)	(0.2)
Security Deposits and other allowances for credit losses writeoff	0.0
Security Deposit and Other Asset, Allowance for Credit Loss Recoveries	0.0
Debt securities at amortized cost
Financing Receivable, Allowance for Credit Loss [Line Items]
Held-to-maturity debt securities, allowance for credit loss	1.1	1.1
Debt Securities, Held-to-maturity, Credit Loss Expense (Reversal)	0.0
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Writeoff	0.0
Held-to-maturity, allowance for credity loss, recovery	0.0
Contract assets, net
Financing Receivable, Allowance for Credit Loss [Line Items]
Contract with Customer, Asset, Allowance for Credit Loss	5.4	$ 4.0
Contract with Customer, Asset, Credit Loss Expense (Reversal)	1.4
Contract with Customer, Asset, Allowance for Credit Loss, Writeoff	0.0
Contract with Customer, Asset, Allowance for Credit Loss, Recovery	$ 0.0