Risk/Return Summary [Abstract] index_6040_MSCI_ACWIBarclays_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes 60%/40% MSCI ACWI/Barclays Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_6040_SPBarclays_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes 60%/40% S&P/Barclays Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_6040_SPBarclays_Index_reflects_no_deductions_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes 60%/40% S&P/Barclays Index (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes) index_7030_MSCI_ACWIBarclays_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes 70%/30% MSCI ACWI/Barclays Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_Barclays_Global_Aggregate_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes Barclays Global Aggregate Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_Barclays_ShortTerm_GovernmentCorporate_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes Barclays Short-Term Government/Corporate Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_Barclays_US_Aggregate_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes Barclays U.S. Aggregate Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_Barclays_US_Corporate_High_Yield_2_Issuer_Capped_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes Barclays U.S. Corporate High Yield 2% Issuer Capped Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_Barclays_US_GovernmentMortgage_Backed_Securities_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes Barclays U.S. Government/Mortgage Backed Securities Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_Barclays_US_Mortgage_Backed_Securities_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes Barclays U.S. Mortgage Backed Securities Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_Consumer_Price_Index_CPI Consumer Price Index (CPI) index_Lipper_Capital_Appreciation_Funds_Index_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper Capital Appreciation Funds Index (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_Core_Bond_Funds_Average_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper Core Bond Funds Average (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_Flexible_Portfolio_Funds_Index_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper Flexible Portfolio Funds Index (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_GNMA_Funds_Average_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper GNMA Funds Average (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_General_US_Government_Funds_Average_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper General U.S. Government Funds Average (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_Global_Equity_Income_Funds_Average_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper Global Equity Income Funds Average (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_Global_Funds_Index_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper Global Funds Index (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_Global_Income_Funds_Index_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper Global Income Funds Index (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_Global_SmallMidCap_Funds_Average_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper Global Small-/Mid-Cap Funds Average (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_Growth_Funds_Index_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper Growth Funds Index (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_Growth_and_Income_Funds_Index_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper Growth and Income Funds Index (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_High_Yield_Funds_Index_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper High Yield Funds Index (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_Intermediate_US_Government_Funds_Average_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper Intermediate U.S. Government Funds Average (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_International_Funds_Index_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper International Funds Index (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_Money_Market_Funds_Average_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper Money Market Funds Average (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_Lipper_Ultra_Short_Obligation_Funds_Average_reflects_no_deduction_for_sales_charges_account_fees_or_US_federal_income_taxes Lipper Ultra Short Obligation Funds Average (reflects no deduction for sales charges, account fees or U.S. federal income taxes) index_MSCI_All_Country_World_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes MSCI All Country World Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_MSCI_All_Country_World_Small_Cap_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes MSCI All Country World Small Cap Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_MSCI_All_Country_World_ex_USA_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes MSCI All Country World ex USA Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_MSCI_Emerging_Markets_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes MSCI Emerging Markets Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) index_SP_500_Index_reflects_no_deduction_for_sales_charges_account_fees_expenses_or_US_federal_income_taxes S&P 500 Index (reflects no deduction for sales charges, account fees, expenses or U.S. federal income taxes) Risk/Return: Prospectus: Document Type Document Period End Date Registrant Name Central Index Key Amendment Flag Document Creation Date Document Effective Date Trading Symbol Prospectus Date Global Growth Fund Class 1 Shares Prospectus Class 1 Shares Prospectus [Member] Class 1 (Global Growth Fund) Class 1 Management fee Other expenses Total annual fund operating expenses Expense Example, with Redemption, 1 Year 1 year Expense Example, No Redemption, 1 Year 1 year Expense Example, with Redemption, 3 Years 3 years Expense Example, No Redemption, 3 Years 3 years Expense Example, with Redemption, 5 Years 5 years Expense Example, No Redemption, 5 Years 5 years Expense Example, with Redemption, 10 Years 10 years Expense Example, No Redemption, 10 Years 10 years Annual Return 1990 Annual Return 1991 Annual Return 1992 Annual Return 1993 Annual Return 1994 Annual Return 1995 Annual Return 1996 Annual Return 1997 Annual Return 1998 Annual Return 1999 Annual Return 2000 Annual Return 2001 Annual Return 2002 Annual Return 2003 Annual Return 2004 Annual Return 2005 Annual Return 2006 Annual Return 2007 Annual Return 2008 Annual Return 2009 Annual Return 2010 Annual Return 2011 Annual Return 2012 Annual Return 2013 Annual Return 2014 Annual Return 2015 Annual Return 2016 Annual Return 2017 Annual Return 2018 Annual Return 2019 Annual Return 2020 Label 1 Year Average Annual Returns, 1 Year 5 Years Average Annual Returns, 5 Years 10 Years Average Annual Returns, 10 Years Since Inception Average Annual Returns, Since Inception Inception Date Average Annual Returns, Inception Date After Taxes on Distributions After Taxes on Distributions After Taxes on Distributions and Sales After Taxes on Distributions and Sales Global Small Capitalization Fund Class 1 (Global Small Capitalization Fund) Class 1 Growth Fund Class 1 (Growth Fund) Class 1 International Fund Class 1 (International Fund) Class 1 New World Fund® Class 1 (New World Fund®) Class 1 Blue Chip Income and Growth Fund Class 1 (Blue Chip Income and Growth Fund) Class 1 Global Growth and Income Fund Class 1 (Global Growth and Income Fund) Class 1 Growth-Income Fund Class 1 (Growth-Income Fund) Class 1 International Growth and Income Fund Class 1 (International Growth and Income Fund) Class 1 Capital Income Builder® Class 1 (Capital Income Builder®) Class 1 Asset Allocation Fund Class 1 (Asset Allocation Fund) Class 1 Global Balanced Fund Class 1 (Global Balanced Fund) Class 1 Bond Fund Class 1 (Bond Fund) Class 1 Global Bond Fund Class 1 (Global Bond Fund) Class 1 High-Income Bond Fund Class 1 (High-Income Bond Fund) Class 1 Mortgage Fund Class 1 (Mortgage Fund) Class 1 Ultra-Short Bond Fund Class 1 (Ultra-Short Bond Fund) Class 1 U.S. Government/AAA-Rated Securities Fund Class 1 (U.S. Government/AAA-Rated Securities Fund) Class 1 Class 2 Shares Prospectus Class 2 Shares Prospectus [Member] Class 2 (Global Growth Fund) Class 2 Distribution and/or service (12b-1) fees Class 2 (Global Small Capitalization Fund) Class 2 Class 2 (Growth Fund) Class 2 Class 2 (International Fund) Class 2 Class 2 (New World Fund®) Class 2 Class 2 (Blue Chip Income and Growth Fund) Class 2 Class 2 (Global Growth and Income Fund) Class 2 Class 2 (Growth-Income Fund) Class 2 Class 2 (International Growth and Income Fund) Class 2 Class 2 (Capital Income Builder®) Class 2 Class 2 (Asset Allocation Fund) Class 2 Class 2 (Global Balanced Fund) Class 2 Class 2 (Bond Fund) Class 2 Class 2 (Global Bond Fund) Class 2 Class 2 (High-Income Bond Fund) Class 2 Class 2 (Mortgage Fund) Class 2 Class 2 (Ultra-Short Bond Fund) Class 2 Class 2 (U.S. Government/AAA-Rated Securities Fund) Class 2 Class 3 Shares Prospectus Class 3 Shares Prospectus [Member] Class 3 (Growth Fund) Class 3 Class 3 (International Fund)