New Accounting Standards Receivables (Details) - USD ($) $ in Millions	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Security deposits and other, net	$ 39.0		$ 42.0
Total financial assets		$ 2,526.7	2,534.1
Accounting Standards Update 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financial assets		(7.4)
Trade receivable, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables, net		2,283.3	2,287.1
Trade receivable, net | Accounting Standards Update 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables, net		(3.8)
Loans receivable, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net		137.0	138.5
Loans receivable, net | Accounting Standards Update 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net		(1.5)
Security deposit and other, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Security deposits and other, net		35.6	36.6
Security deposit and other, net | Accounting Standards Update 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Security deposits and other, net		(1.0)
Debt securities at amortized cost
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt securities at amortized cost		70.8	71.9
Debt securities at amortized cost | Accounting Standards Update 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt securities at amortized cost		(1.1)
Contract assets, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract assets, net		1,517.5	$ 1,520.0
Contract assets, net | Accounting Standards Update 2016-13
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract assets, net		$ (2.5)