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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 276	$ 196	$ 454	$ 394
Other comprehensive income:
Unrealized investment income	62	10	37	17
Less: effect of income taxes	15	2	9	4
Other comprehensive income, net of tax	47	8	28	13
Comprehensive income	$ 323	$ 204	$ 482	$ 407

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