Fixed Assets (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Summary of Fixed Assets

Major classes of fixed assets consist of the following (in millions):

	December 31,
	2019			2018
Office equipment	$	32.6		$	30.0
Furniture and fixtures		126.0			116.9
Leasehold improvements		150.2			132.1
Computer equipment		176.3			145.1
Land and buildings - corporate headquarters		144.9			144.3
Software		392.3			346.0
Other		19.0			12.4
Work in process		18.0			14.9
		1,059.3			941.7
Accumulated depreciation		(591.9	)		(504.8	)
Net fixed assets	$	467.4		$	436.9