2.2.0.7 false Earnings Per Share - Additional Information (Detail) 150 - Disclosure - Earnings Per Share - Additional Information (Detail) true false In Millions false false 1 USD false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 shares Standard http://www.xbrl.org/2003/instance shares 0 iso4217_USD_per_shares Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 $ false 2 USD false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 shares Standard http://www.xbrl.org/2003/instance shares 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 $ 5 Potentially dilutive securities not included in the calculation of diluted EPS because the exercise or purchase prices were greater than the average market price of our common shares 3 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap true na duration No definition available. false false false false false false false false false false false false 1 false true false false 500000 0.5 false false false 2 false true false false 1600000 1.6 false false false xbrli:sharesItemType shares Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 13, 14 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph c false 2 1 false UnKnown HundredThousands UnKnown false true