Discontinued Operations - Summary of Liabilities Related to Discontinued Operations (Detail) £ in Millions, $ in Millions		6 Months Ended			12 Months Ended
		Jun. 30, 2022 USD ($)	Jun. 30, 2022 GBP (£)	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 GBP (£)	Jun. 30, 2022 GBP (£)	Dec. 31, 2021 GBP (£)
Future claims:
Less: Amounts paid		$ (1,662)		$ (1,732)
AXA Settlement Agreement | Future Losses
Installment payments due to AXA:
Total amounts due under the promissory note		0			$ 0		£ 0	£ 0
Future claims:
Estimated beginning balance		30	£ 22	108	108	£ 79
Plus: Additional amounts invoiced		2	2		0	0
Change in estimated future claims		0	0		(14)	(10)
Less: Amounts billed and included as mandatory prepayments		0	0		(61)	(45)
Less: Amounts paid		(31)	(23)		(3)	(2)
Foreign exchange and other		0	0		0	0
Estimated future claims		1	1		30	22
Total amounts due to AXA under the settlement agreement		1			30		£ 1	£ 22
June 2022 | AXA Settlement Agreement | Future Losses
Installment payments due to AXA:
Beginning balance		0	0	217	217	159
Prepayments	[1]	0	0		(217)	(159)
Ending balance		0	0		0	0
September 2022 | AXA Settlement Agreement | Future Losses
Installment payments due to AXA:
Beginning balance		0	0	$ 256	256	187
Amounts billed as future losses		0	0		61	45
Prepayments	[1]	0	0		(324)	(232)
Foreign exchange and other		0	0		7	0
Ending balance		$ 0	£ 0		$ 0	£ 0

[1] On March 3, 2021, we completed the sale of Genworth Australia and received net proceeds of approximately AUD483 million ($370 million). The sale of Genworth Australia resulted in a mandatory principal payment of approximately £176 million ($245 million) related to our outstanding secured promissory note issued to AXA, dated as of July 20, 2020, as amended by the parties in connection with the Genworth Australia sale. On September 21, 2021, we used a portion of the net proceeds from the minority IPO of Enact Holdings to repay the remaining outstanding balance of the secured promissory note of approximately £215 million ($296 million).