Fair Value Measurements Fair Value of Assets and Liabilities Measured on a Recurring Basis (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The following tables present information about our financial instruments measured at fair value on a recurring basis as of December 31, 2018 and 2017, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.

	December 31, 2018								Balance Sheet Classification
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents	$	132.1	$	0.0	$	0.0	$	132.1	Cash and cash equivalents
Liabilities
Contingent acquisition obligations 1	$	0.0	$	0.0	$	148.4	$	148.4
	December 31, 2017								Balance Sheet Classification
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents	$	201.6	$	0.0	$	0.0	$	201.6	Cash and cash equivalents
Liabilities
Contingent acquisition obligations 1	$	0.0	$	0.0	$	147.0	$	147.0

1 Contingent acquisition obligations includes deferred acquisition payments and unconditional obligations to purchase additional noncontrolling equity shares of consolidated subsidiaries. Fair value measurement of the obligations is based upon actual and projected operating performance targets as specified in the related agreements. The increase in this balance of $1.4 from December 31, 2017 to December 31, 2018 is primarily due to acquisitions and exercised put options of $61.8, partially offset by payments of $54.0. The amounts payable within the next twelve months are classified in accrued liabilities; any amounts payable thereafter are classified in other non-current liabilities.