Non-U.S. Activities

We define our non-U.S. activities as those revenue-producing business activities that arise from clients which are generally serviced or managed outside the U.S. Due to the integrated nature of our business, precise segregation of our U.S. and non-U.S. activities is not possible.

Subjective estimates, assumptions and other judgments are applied to quantify the financial results and assets related to our non-U.S. activities, including our application of funds transfer pricing, our asset and liability management policies and our allocation of certain indirect corporate expenses. Management periodically reviews and updates its processes for quantifying the financial results and assets related to our non-U.S. activities.

The following table presents our U.S. and non-U.S. financial results for the periods indicated:



	Three Months Ended September 30,
	2018						2017
(In millions)	Non-U.S.		U.S.		Total		Non-U.S.		U.S.		Total
Total revenue	$	1,286	$	1,665	$	2,951	$	1,219	$	1,627	$	2,846
Income before income taxes	497		370		867		342		480		822

	Nine Months Ended September 30,
	2018						2017
(In millions)	Non-U.S.		U.S.		Total		Non-U.S.		U.S.		Total
Total revenue	$	3,929	$	5,067	$	8,996	$	3,494	$	4,830	$	8,324
Income before income taxes	1,343		1,152		2,495		919		1,263		2,182

Non-U.S. assets were $83.1 billion and $81.5 billion as of September 30, 2018 and 2017, respectively.