Commitments and Contingencies Schedule of Future Minimum Lease Commitments (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Cash amounts for future minimum lease commitments for office premises and equipment under non-cancelable leases, along with minimum sublease rental income to be received under non-cancelable subleases, are listed in the table below.

Period	Rent Obligations		Sublease Rental Income			Net Rent
2017	$	333.0	$	(3.6	)	$	329.4
2018	307.2		(1.7		)	305.5
2019	281.4		(1.6		)	279.8
2020	255.6		(0.8		)	254.8
2021	226.6		(0.2		)	226.4
Thereafter	796.2		0.0			796.2
Total	$	2,200.0	$	(7.9	)	$	2,192.1