Stock repurchase program effective date.

No definition available.

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- Definition

Stock repurchase program extended expiration date.

+ References

No definition available.

+ Details

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- Definition

Stock repurchases program date of announced to public.

+ References

No definition available.

+ Details

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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.

+ Details

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- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

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- Definition

Expiration date for the purchase of an entity's own shares under a stock repurchase plan, in the CCYY-MM-DD format.

+ References

No definition available.

+ Details

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- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

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

+ References

+ Details

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Period Type:	duration

- Definition

Number of previously issued common shares repurchased by the issuing entity and held in treasury.

+ References

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Amount allocated to previously issued common shares repurchased by the issuing entity and held in treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.30)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Details

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- Details

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- Details

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Equity - Narrative (Details) - USD ($)		12 Months Ended
Equity - Narrative (Details) - USD ($)	May 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Feb. 13, 2019	Aug. 01, 2018	Nov. 30, 2017
Equity Class Of Treasury Stock [Line Items]
Purchase of common stock value under the share repurchase program		$ 1,072,000,000	$ 1,072,000,000
Common Stock [Member] \| 2017 Share Repurchase Program [Member]
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 500,000,000
Stock repurchase program effective date		Nov. 30, 2017
Average share price	$ 49.58
Stock repurchases program date of announced to public		Dec. 01, 2017
Purchase of common stock under the share repurchase program	10,085,647
Common Stock [Member] \| 2017 Share Repurchase Program [Member] \| Maximum [Member]
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, authorized amount							$ 500,000,000
Common Stock [Member] \| 2018 Share Repurchase Program [Member]
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, authorized amount		$ 0			$ 1,000,000,000	$ 750,000,000
Stock repurchase program effective date		Aug. 01, 2018
Average share price			$ 36.24	$ 39.31
Stock repurchases program date of announced to public		Aug. 02, 2018
Purchase of common stock under the share repurchase program			8,895,142	6,350,857
Stock repurchase program expiration date		Dec. 31, 2020
Stock repurchase program extended expiration date		Dec. 31, 2022
Purchase of common stock value under the share repurchase program			$ 322,000,000	$ 250,000,000
Remaining available amount of common stock under the share repurchase program		$ 428,000,000
Common Stock [Member] \| 2018 Share Repurchase Program [Member] \| Maximum [Member]
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, authorized amount						$ 750,000,000