20. Segment Information

The Company’s management directs BlackRock’s operations as one business, the asset management business. The Company utilizes a consolidated approach to assess performance and allocate resources. As such, the Company operates in one business segment as defined in ASC 280-10.

The following table illustrates total revenue for the three months ended March 31, 2018 and 2017 by geographic region. These amounts are aggregated on a legal entity basis and do not necessarily reflect where the customer resides or affiliated services are provided.

	Three Months Ended
(in millions)	March 31,
Revenue	2018		2017
Americas	$	2,324	$	2,043
Europe		1,093		906
Asia-Pacific		166		143
Total revenue	$	3,583	$	3,092

The following table illustrates long-lived assets that consist of goodwill and property and equipment at March 31, 2018 and December 31, 2017 by geographic region. These amounts are aggregated on a legal entity basis and do not necessarily reflect where the asset is physically located.

See Note 13, Revenue, for further information on the Company’s sources of revenue.

(in millions)	March 31,		December 31,
Long-lived Assets	2018		2017
Americas	$	13,551	$	13,560
Europe		172		168
Asia-Pacific		83		84
Total long-lived assets	$	13,806	$	13,812

Americas primarily is comprised of the United States and Canada, while Europe primarily is comprised of the United Kingdom and Luxembourg. Asia-Pacific primarily is comprised of Hong Kong, Australia, Japan and Singapore.