Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Net earned premiums	$ 7,312	$ 6,988	$ 6,924
Net investment income	1,817	2,034	1,988
Net realized investment (losses) gains:
Other-than-temporary impairment losses	(21)	(14)	(81)
Other net realized investment (losses) gains	(31)	107	131
Net realized investment gains (losses)	(52)	93	50
Non-insurance warranty revenue	1,007	390	361
Other revenues	50	37	43
Total revenues	10,134	9,542	9,366
Claims, Benefits and Expenses
Insurance claims and policyholders’ benefits	5,572	5,310	5,283
Amortization of deferred acquisition costs	1,335	1,233	1,235
Non-insurance warranty expense	923	299	271
Other operating expenses	1,202	1,229	1,281
Interest	138	161	159
Total claims, benefits and expenses	9,170	8,232	8,229
Income before income tax	964	1,310	1,137
Income tax expense	(151)	(411)	(278)
Net income	$ 813	$ 899	$ 859
Basic earnings per share
Basic earnings per share (in usd per share)	$ 2.99	$ 3.32	$ 3.18
Diluted earnings per share
Diluted earnings per share (in usd per share)	$ 2.98	$ 3.30	$ 3.17
Weighted Average Outstanding Common Stock and Common Stock Equivalents
Basic (in shares)	271.5	271.1	270.4
Diluted (in shares)	272.5	272.1	271.1