Investments (Components on Income from Investment in Leverage Leases) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net Income from Investment in leveraged leases
Net Investment income from investment in leveraged leases	$ 82	$ 57	$ 125
Less: Income tax expense on leveraged leases	29	20	44
Net investment income after income tax from investment in leveraged leases	$ 53	$ 37	$ 81

Pretax lease income allocated in proportionate amounts from unearned income.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=7662751&loc=d3e45152-112736

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- Definition

The tax effect from the current year income from arrangements meeting the criteria for classification as a leveraged lease.

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- Definition

The total recognized during the period for income on leases meeting the criteria for classification as leveraged leases.

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