Borrowings - Long Term Borrowings (Detail) - USD ($) $ in Millions		Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total		$ 1,773	$ 1,899
Genworth Holdings
Debt Instrument [Line Items]
Long-term borrowings	[1]	1,048	1,178
Bond consent fees	[1]	(11)	(12)
Deferred borrowing charges	[1]	(6)	(7)
Total	[1]	1,031	1,159
Genworth Holdings | 4.80% Senior Notes, Due 2024
Debt Instrument [Line Items]
Long-term borrowings	[1]	152	282
Genworth Holdings | 6.50% Senior Notes, Due 2034
Debt Instrument [Line Items]
Long-term borrowings	[1]	298	298
Genworth Holdings | Floating Rate Junior Subordinated Notes, due 2066
Debt Instrument [Line Items]
Long-term borrowings	[1]	598	598
Enact Holdings
Debt Instrument [Line Items]
Deferred borrowing charges		(8)	(10)
Total		742	740
Enact Holdings | 6.50% Senior Notes, Due 2025
Debt Instrument [Line Items]
Long-term borrowings	[2]	$ 750	$ 750

[1] Genworth Holdings has the option to redeem all or a portion of the senior notes at any time with notice to the noteholders at a price equal to the greater of 100% of principal or the sum of the present value of the remaining scheduled payments of principal and interest discounted at the then-current treasury rate plus an applicable spread.

[2] Senior notes issued by Enact Holdings, who has the option to redeem the notes in whole or in part at any time prior to February 15, 2025, by paying a make-whole premium plus accrued and unpaid interest.