Commitments and Contingencies (Leases, and LC and Guarantees ) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Future Minimum Lease Payments under Operating Leases
2016 (remaining three months)	$ 42.6		$ 42.6
2017	118.9		118.9
2018	94.8		94.8
2019	84.5		84.5
2020	80.1		80.1
2021	74.6		74.6
Thereafter	333.7		333.7
Future minimum lease payments, total	829.2		829.2
Operating Leases, Rent Expense
Lease and rental expense	32.7	$ 6.3	63.0	$ 30.6
Letters of credit and guarantees
Irrevocable standby letters of credit and guarantees	$ 130.0		$ 130.0