2.2.0.7 false Non-Cash Investing and Financing Information (Parenthetical) (Detail) (USD $) 148 - Disclosure - Non-Cash Investing and Financing Information (Parenthetical) (Detail) true false In Millions false false 1 USD false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 iso4217_USD_per_shares Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 pure Standard http://www.xbrl.org/2003/instance pure 0 shares Standard http://www.xbrl.org/2003/instance shares 0 $ 5 3 us-gaap_LiabilityForFuturePolicyBenefitsLiabilitiesAssumed us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 true true false false 9000000 9 false false false xbrli:monetaryItemType monetary Increase in the period in the accrued obligations to policy and contract holders that relates to insured events, and can be viewed as either (a) the estimated present value of future benefits to be paid to or on behalf of policyholders and expenses less the present value of future net premiums payable under the insurance contracts or (b) the accumulated amount of net premiums already collected less the accumulated amount of benefits and expenses already paid to or on behalf of policyholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Financial Reporting Release (FRR) -Number 403 -Paragraph 04 -Subparagraph b false 1 1 false Millions UnKnown UnKnown false true