Quarterly Financial Data (unaudited)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Data [Abstract]

Quarterly Financial Data (unaudited)

Quarterly Financial Data (unaudited)

The following tables summarize supplementary quarterly financial information (in millions):

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Year Ended December 31, 2015
Total revenue	$	1,354	$	1,515	$	1,707	$	1,878
Income before income taxes	$	214	$	225	$	231	$	167
Net income	$	150	$	186	$	179	$	131
Year Ended December 31, 2014
Total revenue	$	1,097	$	1,191	$	1,261	$	1,305
Income before income taxes	$	222	$	265	$	208	$	120
Net income	$	145	$	175	$	158	$	59