Plan Assets Related to Pension Benefits by Level within the Fair Value Hierarchy (Detail) (Pension Plans, Defined Benefit, USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Defined Benefit Plan, Fair Value of Plan Assets	$ 2,873		$ 2,742		$ 2,550
Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets
Defined Benefit Plan, Fair Value of Plan Assets	2,854	[1]
Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	1,616	[1]
Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	1,238	[1]
Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member]
Defined Benefit Plan, Fair Value of Plan Assets			2,729	[1]
Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Fair Value of Plan Assets			2,205	[1]
Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Fair Value of Plan Assets			524	[1]
Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Money Market Funds [Member] | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets
Defined Benefit Plan, Fair Value of Plan Assets	83	[1]
Money Market Funds [Member] | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	83	[1]
Money Market Funds [Member] | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Money Market Funds [Member] | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Money Market Funds [Member] | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member]
Defined Benefit Plan, Fair Value of Plan Assets			48	[1]
Money Market Funds [Member] | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | International
Defined Benefit Plan, Fair Value of Plan Assets			401	[1]
Money Market Funds [Member] | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Fair Value of Plan Assets			48	[1]
Money Market Funds [Member] | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | International
Defined Benefit Plan, Fair Value of Plan Assets			401	[1]
Money Market Funds [Member] | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Money Market Funds [Member] | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | International
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Money Market Funds [Member] | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Money Market Funds [Member] | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | International
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Consumer
Defined Benefit Plan, Fair Value of Plan Assets	297	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Public Utility, Equities
Defined Benefit Plan, Fair Value of Plan Assets	163	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Banks, Trust and Insurance, Equities
Defined Benefit Plan, Fair Value of Plan Assets	268	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Health Businesses
Defined Benefit Plan, Fair Value of Plan Assets	166	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Industry
Defined Benefit Plan, Fair Value of Plan Assets	157	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Information Systems and Technology
Defined Benefit Plan, Fair Value of Plan Assets	244	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Materials Businesses
Defined Benefit Plan, Fair Value of Plan Assets	51	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | 517919 All Other Telecommunications [Member]
Defined Benefit Plan, Fair Value of Plan Assets	28	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | Consumer
Defined Benefit Plan, Fair Value of Plan Assets	297	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | Public Utility, Equities
Defined Benefit Plan, Fair Value of Plan Assets	163	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | Banks, Trust and Insurance, Equities
Defined Benefit Plan, Fair Value of Plan Assets	268	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | Health Businesses
Defined Benefit Plan, Fair Value of Plan Assets	166	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | Industry
Defined Benefit Plan, Fair Value of Plan Assets	157	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | Information Systems and Technology
Defined Benefit Plan, Fair Value of Plan Assets	244	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | Materials Businesses
Defined Benefit Plan, Fair Value of Plan Assets	51	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | 517919 All Other Telecommunications [Member]
Defined Benefit Plan, Fair Value of Plan Assets	28	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | Consumer
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | Public Utility, Equities
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | Banks, Trust and Insurance, Equities
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | Health Businesses
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | Industry
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | Information Systems and Technology
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | Materials Businesses
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | 517919 All Other Telecommunications [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | Consumer
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | Public Utility, Equities
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | Banks, Trust and Insurance, Equities
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | Health Businesses
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | Industry
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | Information Systems and Technology
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | Materials Businesses
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | 517919 All Other Telecommunications [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Consumer
Defined Benefit Plan, Fair Value of Plan Assets			218	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Public Utility, Equities
Defined Benefit Plan, Fair Value of Plan Assets			127	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Banks, Trust and Insurance, Equities
Defined Benefit Plan, Fair Value of Plan Assets			136	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Health Businesses
Defined Benefit Plan, Fair Value of Plan Assets			111	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Industry
Defined Benefit Plan, Fair Value of Plan Assets			197	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Information Systems and Technology
Defined Benefit Plan, Fair Value of Plan Assets			199	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Materials Businesses
Defined Benefit Plan, Fair Value of Plan Assets			45	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | 517919 All Other Telecommunications [Member]
Defined Benefit Plan, Fair Value of Plan Assets			17	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Exchange Traded Funds
Defined Benefit Plan, Fair Value of Plan Assets			172	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Consumer
Defined Benefit Plan, Fair Value of Plan Assets			218	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Public Utility, Equities
Defined Benefit Plan, Fair Value of Plan Assets			127	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Banks, Trust and Insurance, Equities
Defined Benefit Plan, Fair Value of Plan Assets			136	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Health Businesses
Defined Benefit Plan, Fair Value of Plan Assets			111	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Industry
Defined Benefit Plan, Fair Value of Plan Assets			197	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Information Systems and Technology
Defined Benefit Plan, Fair Value of Plan Assets			199	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Materials Businesses
Defined Benefit Plan, Fair Value of Plan Assets			45	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | 517919 All Other Telecommunications [Member]
Defined Benefit Plan, Fair Value of Plan Assets			17	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Exchange Traded Funds
Defined Benefit Plan, Fair Value of Plan Assets			172	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Consumer
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Public Utility, Equities
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Banks, Trust and Insurance, Equities
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Health Businesses
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Industry
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Information Systems and Technology
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Materials Businesses
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | 517919 All Other Telecommunications [Member]
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Exchange Traded Funds
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Consumer
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Public Utility, Equities
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Banks, Trust and Insurance, Equities
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Health Businesses
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Industry
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Information Systems and Technology
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Materials Businesses
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | 517919 All Other Telecommunications [Member]
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Equity Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Exchange Traded Funds
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Future [Member] | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets
Defined Benefit Plan, Fair Value of Plan Assets	8	[1]
Future [Member] | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Future [Member] | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	8	[1]
Future [Member] | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | US Treasury Securities [Member]
Defined Benefit Plan, Fair Value of Plan Assets	157	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Corporate Debt Securities [Member] | Investment grade
Defined Benefit Plan, Fair Value of Plan Assets	932	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | International
Defined Benefit Plan, Fair Value of Plan Assets	183	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | US Government Agencies Debt Securities
Defined Benefit Plan, Fair Value of Plan Assets	2	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Foreign Government Debt Securities [Member]
Defined Benefit Plan, Fair Value of Plan Assets	4	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Taxable Municipal Bonds [Member]
Defined Benefit Plan, Fair Value of Plan Assets	53	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Corporate Obligations CMO REMIC [Member]
Defined Benefit Plan, Fair Value of Plan Assets	56	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member]
Defined Benefit Plan, Fair Value of Plan Assets	157	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member] | Investment grade
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | International
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | US Government Agencies Debt Securities
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | Foreign Government Debt Securities [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | Taxable Municipal Bonds [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member] | Corporate Obligations CMO REMIC [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] | Investment grade
Defined Benefit Plan, Fair Value of Plan Assets	932	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | International
Defined Benefit Plan, Fair Value of Plan Assets	183	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities
Defined Benefit Plan, Fair Value of Plan Assets	2	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | Foreign Government Debt Securities [Member]
Defined Benefit Plan, Fair Value of Plan Assets	4	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | Taxable Municipal Bonds [Member]
Defined Benefit Plan, Fair Value of Plan Assets	53	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member] | Corporate Obligations CMO REMIC [Member]
Defined Benefit Plan, Fair Value of Plan Assets	56	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | US Treasury Securities [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member] | Investment grade
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | International
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | US Government Agencies Debt Securities
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | Foreign Government Debt Securities [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | Taxable Municipal Bonds [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member] | Corporate Obligations CMO REMIC [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | US Treasury Securities [Member]
Defined Benefit Plan, Fair Value of Plan Assets			534	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Corporate Debt Securities [Member] | Investment grade
Defined Benefit Plan, Fair Value of Plan Assets			412	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | International
Defined Benefit Plan, Fair Value of Plan Assets			77	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Preferred Securities Domestic [Member]
Defined Benefit Plan, Fair Value of Plan Assets			33	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Preferred Securities Foreign [Member]
Defined Benefit Plan, Fair Value of Plan Assets			2	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member]
Defined Benefit Plan, Fair Value of Plan Assets			534	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member] | Investment grade
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | International
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Preferred Securities Domestic [Member]
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 1 [Member] | Preferred Securities Foreign [Member]
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] | Investment grade
Defined Benefit Plan, Fair Value of Plan Assets			412	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | International
Defined Benefit Plan, Fair Value of Plan Assets			77	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Preferred Securities Domestic [Member]
Defined Benefit Plan, Fair Value of Plan Assets			33	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Preferred Securities Foreign [Member]
Defined Benefit Plan, Fair Value of Plan Assets			2	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury Securities [Member]
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member] | Investment grade
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | International
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Preferred Securities Domestic [Member]
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Fixed Income Securities | Excludes Accrued Income of Less Than 0.5 Percent Of Total Plan Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Preferred Securities Foreign [Member]
Defined Benefit Plan, Fair Value of Plan Assets			0	[1]
Other Assets [Member] | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets
Defined Benefit Plan, Fair Value of Plan Assets	2	[1]
Other Assets [Member] | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	2	[1]
Other Assets [Member] | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Other Assets [Member] | Excludes Accrued Income of Less Than 0.7 Percent of Total Plan Assets | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	$ 0	[1]

[1] 1 Schedule does not include accrued income amounting to less than 0.7% of total plan assets.