XML 67 R55.htm IDEA: XBRL DOCUMENT v3.24.2.u1

Gross Unrealized Losses and Fair Value of Corporate Securities Based on Industries (Detail) $ in Millions	Jun. 30, 2024 USD ($) Securities	Dec. 31, 2023 USD ($) Securities	Jun. 30, 2023
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 5,520	$ 1,459
Less than 12 months, Gross unrealized losses	$ (148)	$ (40)
Less than 12 months, Number of securities in a continuous loss position | Securities	837	223
12 months or more, Fair value	$ 27,466	$ 29,031
12 months or more, Gross unrealized losses	$ (4,134)	$ (3,523)
12 months or more, Number of securities in a continuous loss position | Securities	3,753	3,940
Fair value	$ 32,986	$ 30,490
Gross unrealized losses	$ (4,282)	$ (3,563)
Number of securities in a continuous loss position | Securities	4,590	4,163
Investment, Type [Extensible Enumeration]	Fixed Maturities [Member]	Fixed Maturities [Member]	Fixed Maturities [Member]
U.S. corporate
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 3,397	$ 1,054
Less than 12 months, Gross unrealized losses	$ (108)	$ (30)
Less than 12 months, Number of securities in a continuous loss position | Securities	500	142
12 months or more, Fair value	$ 16,313	$ 17,019
12 months or more, Gross unrealized losses	$ (2,426)	$ (1,994)
12 months or more, Number of securities in a continuous loss position | Securities	2,095	2,164
Fair value	$ 19,710	$ 18,073
Gross unrealized losses	$ (2,534)	$ (2,024)
Number of securities in a continuous loss position | Securities	2,595	2,306
U.S. corporate | Utilities
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 855	$ 177
Less than 12 months, Gross unrealized losses	$ (18)	$ (2)
Less than 12 months, Number of securities in a continuous loss position | Securities	114	21
12 months or more, Fair value	$ 2,096	$ 2,129
12 months or more, Gross unrealized losses	$ (436)	$ (350)
12 months or more, Number of securities in a continuous loss position | Securities	309	308
Fair value	$ 2,951	$ 2,306
Gross unrealized losses	$ (454)	$ (352)
Number of securities in a continuous loss position | Securities	423	329
U.S. corporate | Energy
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 256	$ 122
Less than 12 months, Gross unrealized losses	$ (19)	$ (2)
Less than 12 months, Number of securities in a continuous loss position | Securities	49	20
12 months or more, Fair value	$ 1,254	$ 1,343
12 months or more, Gross unrealized losses	$ (150)	$ (141)
12 months or more, Number of securities in a continuous loss position | Securities	162	168
Fair value	$ 1,510	$ 1,465
Gross unrealized losses	$ (169)	$ (143)
Number of securities in a continuous loss position | Securities	211	188
U.S. corporate | Finance and insurance
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 648	$ 274
Less than 12 months, Gross unrealized losses	$ (13)	$ (8)
Less than 12 months, Number of securities in a continuous loss position | Securities	88	42
12 months or more, Fair value	$ 4,996	$ 5,192
12 months or more, Gross unrealized losses	$ (717)	$ (626)
12 months or more, Number of securities in a continuous loss position | Securities	625	645
Fair value	$ 5,644	$ 5,466
Gross unrealized losses	$ (730)	$ (634)
Number of securities in a continuous loss position | Securities	713	687
U.S. corporate | Consumer-non-cyclical
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 573	$ 173
Less than 12 months, Gross unrealized losses	$ (17)	$ (6)
Less than 12 months, Number of securities in a continuous loss position | Securities	82	18
12 months or more, Fair value	$ 2,483	$ 2,529
12 months or more, Gross unrealized losses	$ (363)	$ (266)
12 months or more, Number of securities in a continuous loss position | Securities	273	280
Fair value	$ 3,056	$ 2,702
Gross unrealized losses	$ (380)	$ (272)
Number of securities in a continuous loss position | Securities	355	298
U.S. corporate | Technology and communications
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 323	$ 105
Less than 12 months, Gross unrealized losses	$ (13)	$ (6)
Less than 12 months, Number of securities in a continuous loss position | Securities	53	19
12 months or more, Fair value	$ 1,936	$ 2,100
12 months or more, Gross unrealized losses	$ (295)	$ (233)
12 months or more, Number of securities in a continuous loss position | Securities	256	269
Fair value	$ 2,259	$ 2,205
Gross unrealized losses	$ (308)	$ (239)
Number of securities in a continuous loss position | Securities	309	288
U.S. corporate | Industrial
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 150	$ 50
Less than 12 months, Gross unrealized losses	$ (5)	$ (1)
Less than 12 months, Number of securities in a continuous loss position | Securities	17	6
12 months or more, Fair value	$ 670	$ 702
12 months or more, Gross unrealized losses	$ (101)	$ (87)
12 months or more, Number of securities in a continuous loss position | Securities	92	96
Fair value	$ 820	$ 752
Gross unrealized losses	$ (106)	$ (88)
Number of securities in a continuous loss position | Securities	109	102
U.S. corporate | Capital goods
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 242	$ 0
Less than 12 months, Gross unrealized losses	$ (14)	$ 0
Less than 12 months, Number of securities in a continuous loss position | Securities	41	0
12 months or more, Fair value	$ 1,106	$ 1,193
12 months or more, Gross unrealized losses	$ (145)	$ (118)
12 months or more, Number of securities in a continuous loss position | Securities	142	150
Fair value	$ 1,348	$ 1,193
Gross unrealized losses	$ (159)	$ (118)
Number of securities in a continuous loss position | Securities	183	150
U.S. corporate | Consumer-cyclical
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 179	$ 88
Less than 12 months, Gross unrealized losses	$ (4)	$ (1)
Less than 12 months, Number of securities in a continuous loss position | Securities	34	11
12 months or more, Fair value	$ 1,047	$ 1,073
12 months or more, Gross unrealized losses	$ (117)	$ (95)
12 months or more, Number of securities in a continuous loss position | Securities	142	148
Fair value	$ 1,226	$ 1,161
Gross unrealized losses	$ (121)	$ (96)
Number of securities in a continuous loss position | Securities	176	159
U.S. corporate | Transportation
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 127	$ 65
Less than 12 months, Gross unrealized losses	$ (4)	$ (4)
Less than 12 months, Number of securities in a continuous loss position | Securities	17	5
12 months or more, Fair value	$ 582	$ 621
12 months or more, Gross unrealized losses	$ (87)	$ (65)
12 months or more, Number of securities in a continuous loss position | Securities	75	82
Fair value	$ 709	$ 686
Gross unrealized losses	$ (91)	$ (69)
Number of securities in a continuous loss position | Securities	92	87
U.S. corporate | Other
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 44	$ 0
Less than 12 months, Gross unrealized losses	$ (1)	$ 0
Less than 12 months, Number of securities in a continuous loss position | Securities	5	0
12 months or more, Fair value	$ 143	$ 137
12 months or more, Gross unrealized losses	$ (15)	$ (13)
12 months or more, Number of securities in a continuous loss position | Securities	19	18
Fair value	$ 187	$ 137
Gross unrealized losses	$ (16)	$ (13)
Number of securities in a continuous loss position | Securities	24	18
Non-U.S. corporate
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 814	$ 157
Less than 12 months, Gross unrealized losses	$ (16)	$ (5)
Less than 12 months, Number of securities in a continuous loss position | Securities	115	19
12 months or more, Fair value	$ 4,856	$ 5,180
12 months or more, Gross unrealized losses	$ (600)	$ (528)
12 months or more, Number of securities in a continuous loss position | Securities	636	684
Fair value	$ 5,670	$ 5,337
Gross unrealized losses	$ (616)	$ (533)
Number of securities in a continuous loss position | Securities	751	703
Non-U.S. corporate | Utilities
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 104	$ 0
Less than 12 months, Gross unrealized losses	$ (2)	$ 0
Less than 12 months, Number of securities in a continuous loss position | Securities	11	0
12 months or more, Fair value	$ 575	$ 609
12 months or more, Gross unrealized losses	$ (66)	$ (55)
12 months or more, Number of securities in a continuous loss position | Securities	65	68
Fair value	$ 679	$ 609
Gross unrealized losses	$ (68)	$ (55)
Number of securities in a continuous loss position | Securities	76	68
Non-U.S. corporate | Energy
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 122	$ 39
Less than 12 months, Gross unrealized losses	$ (2)	$ (1)
Less than 12 months, Number of securities in a continuous loss position | Securities	15	4
12 months or more, Fair value	$ 450	$ 487
12 months or more, Gross unrealized losses	$ (52)	$ (44)
12 months or more, Number of securities in a continuous loss position | Securities	53	59
Fair value	$ 572	$ 526
Gross unrealized losses	$ (54)	$ (45)
Number of securities in a continuous loss position | Securities	68	63
Non-U.S. corporate | Finance and insurance
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 144	$ 100
Less than 12 months, Gross unrealized losses	$ (2)	$ (2)
Less than 12 months, Number of securities in a continuous loss position | Securities	29	10
12 months or more, Fair value	$ 1,328	$ 1,358
12 months or more, Gross unrealized losses	$ (140)	$ (138)
12 months or more, Number of securities in a continuous loss position | Securities	186	203
Fair value	$ 1,472	$ 1,458
Gross unrealized losses	$ (142)	$ (140)
Number of securities in a continuous loss position | Securities	215	213
Non-U.S. corporate | Consumer-non-cyclical
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 97	$ 0
Less than 12 months, Gross unrealized losses	$ (5)	$ 0
Less than 12 months, Number of securities in a continuous loss position | Securities	14	0
12 months or more, Fair value	$ 416	$ 471
12 months or more, Gross unrealized losses	$ (72)	$ (61)
12 months or more, Number of securities in a continuous loss position | Securities	50	55
Fair value	$ 513	$ 471
Gross unrealized losses	$ (77)	$ (61)
Number of securities in a continuous loss position | Securities	64	55
Non-U.S. corporate | Technology and communications
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 63	$ 0
Less than 12 months, Gross unrealized losses	$ (1)	$ 0
Less than 12 months, Number of securities in a continuous loss position | Securities	9	0
12 months or more, Fair value	$ 597	$ 659
12 months or more, Gross unrealized losses	$ (80)	$ (65)
12 months or more, Number of securities in a continuous loss position | Securities	74	83
Fair value	$ 660	$ 659
Gross unrealized losses	$ (81)	$ (65)
Number of securities in a continuous loss position | Securities	83	83
Non-U.S. corporate | Industrial
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 94	$ 18
Less than 12 months, Gross unrealized losses	$ (1)	$ (2)
Less than 12 months, Number of securities in a continuous loss position | Securities	16	5
12 months or more, Fair value	$ 418	$ 436
12 months or more, Gross unrealized losses	$ (51)	$ (47)
12 months or more, Number of securities in a continuous loss position | Securities	60	61
Fair value	$ 512	$ 454
Gross unrealized losses	$ (52)	$ (49)
Number of securities in a continuous loss position | Securities	76	66
Non-U.S. corporate | Capital goods
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 105	$ 0
Less than 12 months, Gross unrealized losses	$ (2)	$ 0
Less than 12 months, Number of securities in a continuous loss position | Securities	12	0
12 months or more, Fair value	$ 356	$ 384
12 months or more, Gross unrealized losses	$ (46)	$ (38)
12 months or more, Number of securities in a continuous loss position | Securities	47	49
Fair value	$ 461	$ 384
Gross unrealized losses	$ (48)	$ (38)
Number of securities in a continuous loss position | Securities	59	49
Non-U.S. corporate | Consumer-cyclical
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 0	$ 0
Less than 12 months, Gross unrealized losses	$ 0	$ 0
Less than 12 months, Number of securities in a continuous loss position | Securities	0	0
12 months or more, Fair value	$ 170	$ 188
12 months or more, Gross unrealized losses	$ (19)	$ (17)
12 months or more, Number of securities in a continuous loss position | Securities	25	26
Fair value	$ 170	$ 188
Gross unrealized losses	$ (19)	$ (17)
Number of securities in a continuous loss position | Securities	25	26
Non-U.S. corporate | Transportation
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 0	$ 0
Less than 12 months, Gross unrealized losses	$ 0	$ 0
Less than 12 months, Number of securities in a continuous loss position | Securities	0	0
12 months or more, Fair value	$ 266	$ 216
12 months or more, Gross unrealized losses	$ (30)	$ (20)
12 months or more, Number of securities in a continuous loss position | Securities	35	30
Fair value	$ 266	$ 216
Gross unrealized losses	$ (30)	$ (20)
Number of securities in a continuous loss position | Securities	35	30
Non-U.S. corporate | Other
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 85	$ 0
Less than 12 months, Gross unrealized losses	$ (1)	$ 0
Less than 12 months, Number of securities in a continuous loss position | Securities	9	0
12 months or more, Fair value	$ 280	$ 372
12 months or more, Gross unrealized losses	$ (44)	$ (43)
12 months or more, Number of securities in a continuous loss position | Securities	41	50
Fair value	$ 365	$ 372
Gross unrealized losses	$ (45)	$ (43)
Number of securities in a continuous loss position | Securities	50	50
Corporate Debt Securities
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, Fair value	$ 4,211	$ 1,211
Less than 12 months, Gross unrealized losses	$ (124)	$ (35)
Less than 12 months, Number of securities in a continuous loss position | Securities	615	161
12 months or more, Fair value	$ 21,169	$ 22,199
12 months or more, Gross unrealized losses	$ (3,026)	$ (2,522)
12 months or more, Number of securities in a continuous loss position | Securities	2,731	2,848
Fair value	$ 25,380	$ 23,410
Gross unrealized losses	$ (3,150)	$ (2,557)
Number of securities in a continuous loss position | Securities	3,346	3,009

X

- Definition

Available for Sale Securities Continuous Unrealized Loss Position [Line Items]

+ References

No definition available.

+ Details

Name:	gnw_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLineItems
Namespace Prefix:	gnw_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479081/326-30-55-8

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-7

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479106/326-30-50-5

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479106/326-30-50-5

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479106/326-30-50-4

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479081/326-30-55-8

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-7

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479106/326-30-50-5

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479106/326-30-50-5

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without an allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479106/326-30-50-4

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479081/326-30-55-8

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479106/326-30-50-4

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479106/326-30-50-4

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479106/326-30-50-4

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Indicates type of investment. Includes, but is not limited to, common stock, preferred stock, convertible security, fixed income security, government security, option purchased, warrant, loan participation and assignment, commercial paper, bankers' acceptance, certificates of deposit, short-term security, repurchase agreement, and other investment company.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480524/946-210-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480524/946-210-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.12-12A(Column A)(Footnote 2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14(Column A)(Footnote 2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12(Column A)(Footnote 2)(i))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12(Column C)(Footnote 5))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Column A)(Footnote 1)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Column C)(Footnote 2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-3

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14(Column F)(Footnote 7))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-6

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.12-12A(Column C)(Footnote 4))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-2

+ Details

Name:	us-gaap_InvestmentTypeExtensibleEnumeration
Namespace Prefix:	us-gaap_
Data Type:	enum2:enumerationSetItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_DomesticCorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=gnw_UtilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=gnw_EnergyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_FinancialServicesSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=gnw_ConsumerNonCyclicalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_TechnologySectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=gnw_IndustrialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=gnw_CapitalGoodsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=gnw_ConsumerCyclicalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=gnw_TransportationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_EquitySecuritiesByIndustryAxis=gnw_OtherIndustriesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ForeignCorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: