Borrowings and Bank Deposits (Liquidity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Long-term Debt, Fiscal Year Maturity
2014	$ 39,215,000,000
2015	39,672,000,000
2016	31,987,000,000
2017	25,866,000,000
2018	18,183,000,000
Fixed and floating rate notes containing put options	443,000,000
Banks extending committed credit lines	50
Line of Credit Facility, Maximum Borrowing Capacity	47,800,000,000
Parent Company [Member]
Long-term Debt, Fiscal Year Maturity
Line of Credit Facility, Maximum Borrowing Capacity	13,900,000,000
Three Hundred Sixty Four Day Lines Containing Term Out Feature [Member]
Long-term Debt, Fiscal Year Maturity
Line of Credit Facility, Maximum Borrowing Capacity	21,300,000,000
Revolving Credit Facility [Member]
Long-term Debt, Fiscal Year Maturity
Line of Credit Facility, Maximum Borrowing Capacity	$ 26,500,000,000