The acquisition price to be paid in addition to the tangible book value of the acquiree at the closing date.

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The estimated aggregate cost to acquire equity ownership interests of less than wholly owned subsidiaries under an agreement.

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- Definition

The recovery percentage of the entity's surety bond claim losses that its joint venture partner is obligated to pay.

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No definition available.

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The amount of total assets using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country.

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Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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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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- Definition

Minimum amount of purchase arrangement maturing after the fifth fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

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No definition available.

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Minimum amount of purchase arrangement maturing in the fifth fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

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Minimum amount of purchase arrangement maturing in the fourth fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

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No definition available.

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Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

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Minimum amount of purchase arrangement maturing in the second fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

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Minimum amount of purchase arrangement maturing in the third fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

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The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Contingencies and Commitments - Narrative (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2016
Contingencies and Commitments [Line Items]
Operating leases, rent expense	$ 1,573,000,000	$ 1,516,000,000	$ 1,484,000,000
Purchase commitments - 2017	11,100,000,000
Purchase commitments - 2018	4,100,000,000
Purchase commitments - 2019	3,500,000,000
Purchase commitments - 2020	2,900,000,000
Purchase commitments - 2021	2,000,000,000
Purchase commitments - After 2021	14,600,000,000
Estimated cost to acquire certain equity ownership interests of less than wholly-owned subsidiaries	$ 5,000,000,000
Insurance Group [Member]
Contingencies and Commitments [Line Items]
Reimbursement rate from joint venture partner of Company's surety bond claim losses	50.00%
Berkadia Commercial Mortgage (investee) [Member]
Contingencies and Commitments [Line Items]
Voting interest in investee	50.00%
Commercial paper outstanding	$ 1,470,000,000
Berkadia Commercial Mortgage (investee) [Member] \| Commercial Paper [Member]
Contingencies and Commitments [Line Items]
Maximum outstanding balance of commercial paper borrowings	$ 1,500,000,000
Leucadia National Corporation (venture partner) [Member] \| Berkadia Commercial Mortgage (investee) [Member]
Contingencies and Commitments [Line Items]
Voting interest in investee	50.00%
NICO [Member] \| Purchase Agreement [Member] \| Medical Liability Mutual Insurance Company [Member]
Contingencies and Commitments [Line Items]
Statutory assets				$ 5,500,000,000
Statutory policyholders' surplus				$ 1,900,000,000
Acquisition price in addition to tangible book value of acquiree	$ 100,000,000