PROPERTY AND EQUIPMENT, NET

12 Months Ended

Dec. 31, 2017

PROPERTY AND EQUIPMENT, NET

NOTE 6 PROPERTY AND EQUIPMENT, NET

Property and equipment, net consisted of:

		December 31,
		2017		2016
Office and computer equipment (3 - 10 year estimated useful life)		$	219.5	$	189.1
Office furniture and fixtures (3 - 10 year estimated useful life)			50.5		47.1
Internal-use computer software (1 - 10 year estimated useful life)			520.3		452.1
Leasehold improvements and building (2 - 20 year estimated useful life)			240.8		233.1
	Total property and equipment, at cost		1,031.1		921.4
Less: accumulated depreciation and amortization			(706.0)		(595.5)
Total property and equipment, net		$	325.1	$	325.9

Depreciation and amortization expense related to the above assets was $96.9million, $92.5 million, and $81.6 million for the years ended December 31,2017, 2016 and 2015, respectively.