Parent Company (Details 1) - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 22,762,000,000	$ 22,288,000,000	$ 19,486,000,000	$ 22,250,000,000
Investment securities	3,759,000,000	4,431,000,000	0
Accounts receivable, less reserves	43,671,000,000	44,386,000,000
Premises and equipment, less accumulated depreciation	4,108,000,000	3,938,000,000
Other assets	10,069,000,000	11,342,000,000
Total assets	161,184,000,000	159,103,000,000	153,000,000,000
Liabilities and Shareholders' Equity
Long-term debt	48,061,000,000	57,955,000,000
Total liabilities	140,511,000,000	138,430,000,000
Shareholders' Equity
Preferred shares	0	0
Common shares	194,000,000	205,000,000
Additional paid-in capital	13,348,000,000	12,874,000,000
Retained earnings	9,665,000,000	9,513,000,000
Accumulated other comprehensive loss	(2,534,000,000)	(1,919,000,000)
Total shareholders' equity	20,673,000,000	20,673,000,000	19,496,000,000	18,886,000,000
Total liabilities and shareholders' equity	161,184,000,000	159,103,000,000
Parent Company Details (Textuals) [Abstract]
Premises and equipment, accumulated depreciation	6,801,000,000	6,270,000,000
Parent Company [Member]
Assets
Cash and cash equivalents	6,400,000,000	8,824,000,000	$ 6,076,000,000	$ 4,797,000,000
Investment securities	1,000,000	1,000,000
Equity in net assets of subsidiaries and affiliates	19,856,000,000	20,123,000,000
Accounts receivable, less reserves	311,000,000	134,000,000
Premises and equipment, less accumulated depreciation	133,000,000	139,000,000
Loans to subsidiaries and affiliates	11,762,000,000	7,809,000,000
Due from subsidiaries and affiliates	896,000,000	1,477,000,000
Other assets	275,000,000	365,000,000
Total assets	39,634,000,000	38,872,000,000
Liabilities and Shareholders' Equity
Accounts payable and other liabilities	1,603,000,000	1,590,000,000
Due to subsidiaries and affiliates	716,000,000	964,000,000
Short-term debt of subsidiaries and affiliates	6,923,000,000	5,937,000,000
Long-term debt	9,719,000,000	9,708,000,000
Total liabilities	18,961,000,000	18,199,000,000
Shareholders' Equity
Preferred shares	0	0
Common shares	194,000,000	205,000,000
Additional paid-in capital	13,348,000,000	12,874,000,000
Retained earnings	9,665,000,000	9,513,000,000
Accumulated other comprehensive loss	(2,534,000,000)	(1,919,000,000)
Total shareholders' equity	20,673,000,000	20,673,000,000
Total liabilities and shareholders' equity	39,634,000,000	38,872,000,000
Parent Company Details (Textuals) [Abstract]
Premises and equipment, accumulated depreciation	$ 140,000,000	$ 106,000,000

Accounts payable represents carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Other liabilities represents carrying amount as of the balance sheet date of liabilities not otherwise specified in the taxonomy. Also serves as the sum of liabilities not individually reported in the financial statements, or not separately disclosed in notes.

No definition available.