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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 185	$ 175	$ 639	$ 569
Other comprehensive income:
Unrealized investment income	6	0	43	17
Less: effect of income taxes	1	0	10	4
Other comprehensive income, net of tax	5	0	33	13
Comprehensive income	$ 190	$ 175	$ 672	$ 582

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