Income Taxes - Schedule of Components of Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Unrealized losses on investment securities, net	$ 57	$ 0
Deferred compensation	167	168
Defined benefit pension plan	143	193
Restructuring charges and other reserves	363	237
Foreign currency translation	155	56
Real estate	20	9
Other	32	68
Total deferred tax assets	937	731
Valuation allowance for deferred tax assets	(27)	(54)
Deferred tax assets, net of valuation allowance	910	677
Deferred tax liabilities:
Unrealized gains on securities, net	0	5
Leveraged lease financing	334	326
Defined benefit pension plan	804	1,006
Non-U.S. earnings	265	167
Other	121	83
Total deferred tax liabilities	$ 1,524	$ 1,587