Non-U.S. Activities

We generally define our non-U.S. activities as those revenue-producing business activities that arise from clients domiciled 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. During 2015, management updated its processes for quantifying the financial results related to our non-U.S. activities. Results for the years ended December 31, 2014 and 2013 have not been revised to reflect the change due to a lack of comparable underlying data.

Non-U.S. revenue for the years ended December 31, 2015, 2014 and 2013 included $938 million, $1.02 billion and $903 million, respectively, in the U.K., primarily from our London operations.

The following table presents our U.S. and non-U.S. financial results for the years ended December 31:



	2015						2014						2013
(In millions)	Non-U.S.		U.S.		Total		Non-U.S.		U.S.		Total		Non-U.S.		U.S.		Total
Total revenue	$	4,428	$	5,932	$	10,360	$	4,644	$	5,630	$	10,274	$	4,299	$	5,565	$	9,864
Income before income taxes	1,193		1,105		2,298		1,343		1,094		2,437		1,169		1,497		2,666

Non-U.S. assets were $78.1 billion and $60.0 billion as of December 31, 2015 and 2014, respectively.