Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

Fair value of securities pledged as collateral against derivative liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226013-175313

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6441202&loc=d3e80720-113993

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580

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-Name Accounting Standards Codification
-Topic 220
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-Section 45
-Paragraph 11
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Fair Value Measurements - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative liability fair value of collateral	$ 0		$ 0			$ 200,000,000
Net Investment Hedges \| Euro Denominated Debt
Derivatives, Fair Value [Line Items]
Notional amount	800,000,000		800,000,000			800,000,000
Forward Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Pre-tax gains (loss) recognized in other comprehensive income (loss)		$ (100,000,000)	(200,000,000)
New Cross Currency Swaps \| Fair Value Hedges
Derivatives, Fair Value [Line Items]
Notional amount	1,000,000,000		1,000,000,000
New Interest Rate Swaps \| Fair Value Hedges
Derivatives, Fair Value [Line Items]
Notional amount					$ 3,500,000,000
Cross Currency Swaps
Derivatives, Fair Value [Line Items]
Notional amount	13,911,000,000		13,911,000,000			$ 12,890,000,000
Pre-tax gains (loss) recognized in other comprehensive income (loss)	400,000,000	$ (400,000,000)	500,000,000	$ (200,000,000)
New Interest Rate Caps
Derivatives, Fair Value [Line Items]
Notional amount	$ 300,000,000		$ 300,000,000