2.2.0.25falsefalse135 - Disclosure - Commitments and Contingencies - Additional Information (Detail)truefalseIn Millionsfalse1falsefalseUSDfalsefalse7/1/2010 - 3/31/2011
USD ($)
USD ($) / shares
$eol_PE1341----1110-Q0005_STD_274_20110331_0http://www.sec.gov/CIK0000080424duration2010-07-01T00:00:002011-03-31T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0sharesStandardhttp://www.xbrl.org/2003/instanceshares0USDUSD$5false0us-gaap_LossContingencyAccrualAtCarryingValueus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse606000000606falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe carrying amount as of the balance sheet date of the combined total of loss contingency reserves.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
falsefalse6false0us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisionsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse424000000424falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryReflects the effects of adjustments of previously recorded tax expense, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, IRS tax settlement and unusual repatriation of foreign earnings.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 10A, 10B, 10C
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 10
-Subparagraph b
falsefalse12Commitments and Contingencies - Additional Information (Detail) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue
