Aggregate dividends paid during the period for each share of common stock outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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No definition available.

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- Definition

Cash outflow in the form of ordinary dividends to common shareholders, preferred shareholders and noncontrolling interests, generally out of earnings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

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Capital Stock - Summary of Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
February 13, 2020
Dividends Payable [Line Items]
Dividend per share (in dollars per share)	$ 0.34
Payment of dividends to stockholders	$ 48
February 6, 2019
Dividends Payable [Line Items]
Dividend per share (in dollars per share)		$ 0.32
Payment of dividends to stockholders		$ 47
May 1, 2019
Dividends Payable [Line Items]
Dividend per share (in dollars per share)		$ 0.32
Payment of dividends to stockholders		$ 48
July 24, 2019
Dividends Payable [Line Items]
Dividend per share (in dollars per share)		$ 0.34
Payment of dividends to stockholders		$ 50
November 6, 2019
Dividends Payable [Line Items]
Dividend per share (in dollars per share)		$ 0.34
Payment of dividends to stockholders		$ 50
February 7, 2018
Dividends Payable [Line Items]
Dividend per share (in dollars per share)			$ 0.30
Payment of dividends to stockholders			$ 46
April 24, 2018
Dividends Payable [Line Items]
Dividend per share (in dollars per share)			$ 0.30
Payment of dividends to stockholders			$ 45
July 23, 2018
Dividends Payable [Line Items]
Dividend per share (in dollars per share)			$ 0.32
Payment of dividends to stockholders			$ 47
October 19, 2018
Dividends Payable [Line Items]
Dividend per share (in dollars per share)			$ 0.32
Payment of dividends to stockholders			$ 48