Income Taxes Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Deferred tax assets, tax credit carryforwards	$ 1,784	$ 1,796
Deferred tax assets, adjustment to loan value	448	366
Deferred tax assets, state and local taxes	153	168
Deferred tax assets, unearned insurance premiums	98	90
Deferred tax assets, other	214	257
Deferred tax assets, gross	2,697	2,677
Deferred tax assets, valuation allowance	(837)	(1,057)
Deferred tax assets, net of valuation allowance	1,860	1,620
Deferred tax liabilities, lease transactions	1,325	850
Deferred tax liabilities, deferred acquisiton cost	366	321
Deferred tax liabilities, debt transactions	91	93
Deferred tax liabilities, other	87	56
Deferred tax liabilities, gross	1,869	1,320
Net deferred tax (liabilities) assets	(9)	300
Deferred tax assets, net	58	317
Deferred tax liabilities, net	$ 67	$ 17