Supplementary Disclosure of Consolidated Cash Flow Information - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash paid during the period for:
Interest	$ 1,282	$ 1,331	$ 1,368
Taxes	544	493	511
Non-cash investing/financing activities:
Interest credited to policyholder contract deposits included in financing activities	3,309	3,430	3,676
International Lease Finance Corporation (ILFC)
Sale of businesses and securities
Non-cash consideration received from sale	0	0	0
Aer Cap
Sale of businesses and securities
Non-cash consideration received from sale	0	0	500
United Guaranty Corporation
Sale of businesses and securities
Non-cash consideration received from sale	$ 0	$ 1,101	$ 0

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Amount of cash paid for interest. Includes, but is not limited to, payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586

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-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (e)
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-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
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