Share based compensation expense recognized period.

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- Definition

Stock Repurchase Program, Additional Authorized Amount

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

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.

+ References

No definition available.

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- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

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- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

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-Topic 505
-SubTopic 30
-Section 45
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- Definition

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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-Topic 210
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-Section S99
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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

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- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Stockholders' Deficit - Repurchase of Common Stock (Detail) - USD ($)		1 Months Ended	12 Months Ended
	Jun. 13, 2014	Feb. 28, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	May 02, 2018	Nov. 30, 2017	Dec. 31, 2016	Jul. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense recognized period				15 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Stock repurchase program, additional authorized amount						$ 1,500,000,000
Number of common stock shares repurchased (in shares)	3,932,244
Treasury stock value			$ 67,300,000	$ 571,700,000	$ 1,302,100,000
Common stock repurchase (price per share)	$ 33.06
Common stock in treasury, shares (in shares)			77,109,722	75,964,667	61,485,423			34,156,355
July 2015 Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Stock repurchase program, authorized amount						$ 1,000,000,000.0			$ 1,500,000,000
Common Stock Repurchase Set Two \| Share Trading Plan
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of common stock shares repurchased (in shares)			1,560,633	14,898,454
Treasury stock value			$ 67,200,000	$ 651,400,000
Common stock repurchase (price per share)			$ 43.09	$ 43.72
Common Stock Repurchase Set One \| Share Trading Plan
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of common stock shares repurchased (in shares)				13,678,818
Treasury stock value				$ 571,400,000
Common stock repurchase (price per share)				$ 41.77
Accelerated Share Repurchase Agreement
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Stock repurchase program, authorized amount					$ 400,000,000.0		$ 400,000,000.0
Treasury stock value					$ 320,000,000.0
Common stock repurchase (price per share)		$ 48.14
Common stock in treasury, shares (in shares)		8,308,692