Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Premiums	$ 1,122	$ 1,135	$ 3,398	$ 3,382
Net investment income	815	797	2,447	2,388
Net investment gains (losses)	13	85	(32)	220
Total revenues	2,143	2,215	6,417	6,609
Benefits and expenses:
Benefits and other changes in policy reserves	1,321	1,344	3,837	3,796
Interest credited	151	164	459	494
Acquisition and operating expenses, net of deferrals	243	265	736	775
Amortization of deferred acquisition costs and intangibles	83	83	299	316
Interest expense	72	73	225	209
Total benefits and expenses	1,870	1,929	5,556	5,590
Income from continuing operations before income taxes	273	286	861	1,019
Provision for income taxes	63	102	237	348
Income from continuing operations	210	184	624	671
Loss from discontinued operations, net of taxes	0	(9)	0	(9)
Net income	210	175	624	662
Less: net income attributable to noncontrolling interests	64	68	176	198
Net income available to Genworth Financial, Inc.'s common stockholders	$ 146	$ 107	$ 448	$ 464
Income from continuing operations available to Genworth Financial, Inc.'s common stockholders per share:
Basic	$ 0.29	$ 0.23	$ 0.89	$ 0.95
Diluted	0.29	0.23	0.89	0.94
Net income available to Genworth Financial, Inc.'s common stockholders per share:
Basic	0.29	0.21	0.89	0.93
Diluted	$ 0.29	$ 0.21	$ 0.89	$ 0.93
Weighted-average common shares outstanding:
Basic	500.7	499.1	500.3	498.9
Diluted	503.3	501.6	502.9	501.2
Supplemental disclosures:
Total other-than-temporary impairments	$ 0	$ (1)	$ 0	$ (4)
Portion of other-than-temporary impairments included in other comprehensive income (loss)	0	0	0	0
Net other-than-temporary impairments	0	(1)	0	(4)
Other investments gains (losses)	13	86	(32)	224
Net investment gains (losses)	13	85	(32)	220
Policy fees and other income
Revenues:
Revenue from contract with customer including assessed tax	$ 193	$ 198	$ 604	$ 619