XML 42 R47.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Investments - Fair Value and Gross Unrealized Losses of Available-for-Sale Securities (Detail) (USD $) In Millions, unless otherwise specified | 9 Months Ended |
--- | --- | ---
Jun. 30, 2014 Security | Sep. 30, 2013 Security
Schedule of Available-for-sale Securities [Line Items] |  |
Document Period End Date | Jun. 30, 2014 |
Available-for-sale securities, Fair Value, Less than 12 months | $ 1,197.5 | $ 5,405.9
Available For Sale Securities In A Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses | (16.2) | (235.9)
Available-for-sale securities, Fair Value, 12 months or longer | 1,844.6 | 520.0
Available-for-sale Securities, Gross Unrealized Losses, 12 months or longer | (52.4) | (28.0)
Available-for-sale securities, Fair Value, Total | 3,042.1 | 5,925.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 68.6 | 263.9
Total number of available-for-sale securities in an unrealized loss position, Less than 12 months | 175 | 588
Total number of available-for-sale securities in an unrealized loss position, 12 months or longer | 250 | 78
Total number of available-for-sale securities in an unrealized loss position | 425 | 666
Asset-backed securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Fair Value, Less than 12 months | 454.0 | 329.3
Available For Sale Securities In A Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses | (3.8) | (4.5)
Available-for-sale securities, Fair Value, 12 months or longer | 306.2 | 81.5
Available-for-sale Securities, Gross Unrealized Losses, 12 months or longer | (5.7) | (0.7)
Available-for-sale securities, Fair Value, Total | 760.2 | 410.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 9.5 | 5.2
Commercial mortgage-backed securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Fair Value, Less than 12 months | 52.8 | 26.6
Available For Sale Securities In A Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses | (0.1) | (0.5)
Available-for-sale securities, Fair Value, 12 months or longer | 0.2 | 4.9
Available-for-sale Securities, Gross Unrealized Losses, 12 months or longer | (1.0) | (1.1)
Available-for-sale securities, Fair Value, Total | 53.0 | 31.5
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 1.1 | 1.6
Corporates [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Fair Value, Less than 12 months | 446.1 | 3,457.2
Available For Sale Securities In A Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses | (8.0) | (175.0)
Available-for-sale securities, Fair Value, 12 months or longer | 1,009.2 | 186.0
Available-for-sale Securities, Gross Unrealized Losses, 12 months or longer | (28.6) | (10.1)
Available-for-sale securities, Fair Value, Total | 1,455.3 | 3,643.2
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 36.6 | 185.1
Equities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Fair Value, Less than 12 months | 46.0 | 118.6
Available For Sale Securities In A Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses | (0.2) | (9.1)
Available-for-sale securities, Fair Value, 12 months or longer | 80.6 | 32.2
Available-for-sale Securities, Gross Unrealized Losses, 12 months or longer | (4.7) | (1.2)
Available-for-sale securities, Fair Value, Total | 126.6 | 150.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 4.9 | 10.3
Hybrids [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Fair Value, Less than 12 months |  | 52.0
Available For Sale Securities In A Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses |  | (3.3)
Available-for-sale securities, Fair Value, 12 months or longer | 12.7 |
Available-for-sale Securities, Gross Unrealized Losses, 12 months or longer | (0.2) |
Available-for-sale securities, Fair Value, Total | 12.7 | 52.0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 0.2 | 3.3
Municipals [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Fair Value, Less than 12 months | 15.9 | 333.3
Available For Sale Securities In A Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses |  | (27.3)
Available-for-sale securities, Fair Value, 12 months or longer | 213.6 | 144.4
Available-for-sale Securities, Gross Unrealized Losses, 12 months or longer | (7.2) | (13.5)
Available-for-sale securities, Fair Value, Total | 229.5 | 477.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 7.2 | 40.8
Agency residential mortgage-backed securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Fair Value, Less than 12 months | 5.5 | 9.8
Available For Sale Securities In A Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses |  | (0.1)
Available-for-sale securities, Fair Value, 12 months or longer | 0.7 | 1.1
Available-for-sale Securities, Gross Unrealized Losses, 12 months or longer |  | (0.2)
Available-for-sale securities, Fair Value, Total | 6.2 | 10.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 0.3
Non-agency residential mortgage-backed securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Fair Value, Less than 12 months | 177.2 | 325.2
Available For Sale Securities In A Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses | (4.1) | (12.2)
Available-for-sale securities, Fair Value, 12 months or longer | 139.7 | 69.9
Available-for-sale Securities, Gross Unrealized Losses, 12 months or longer | (3.7) | (1.2)
Available-for-sale securities, Fair Value, Total | 316.9 | 395.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 7.8 | 13.4
U.S. Government securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Fair Value, Less than 12 months |  |
Available For Sale Securities In A Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses |  |
Available-for-sale securities, Fair Value, 12 months or longer | 81.7 |
Available-for-sale Securities, Gross Unrealized Losses, 12 months or longer | (1.3) |
Available-for-sale securities, Fair Value, Total | 81.7 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 1.3 |
US Government Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, Fair Value, Less than 12 months |  | 753.9
Available For Sale Securities In A Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses |  | (3.9)
Available-for-sale securities, Fair Value, 12 months or longer |  |
Available-for-sale Securities, Gross Unrealized Losses, 12 months or longer |  |
Available-for-sale securities, Fair Value, Total |  | 753.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | $ 3.9

X
- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. + References No definition available. + Details
Name: | dei_DocumentPeriodEndDate
Namespace Prefix: | dei_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of investment positions in available-for-sale investments that have been in a continuous unrealized loss position for greater than or equal to a year for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. + References No definition available. + Details
Name: | us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of investment positions in available-for-sale investments in a continuous unrealized loss position for less than one year or normal operating cycle, if longer, for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration