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Stock Repurchase Programs	12 Months Ended
	Dec. 31, 2021
Stock Repurchase Program [Abstract]
Stock Repurchase Programs	Stock Repurchase Programs We repurchased and retired 12.7 million, 7.4 million, and 11.3 million shares of Common Stock under our stock repurchase programs in 2021, 2020, and 2019, respectively, at a cost of $3.4 billion, $1.4 billion, and $2.1 billion, respectively.  On September 26, 2017, our Board of Directors authorized the repurchase of up to an additional 50 million shares of Common Stock through December 31, 2022. As of December 31, 2021, 8.0 million shares remain authorized for repurchase.

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- Definition

The entire disclosure for treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-URI http://asc.fasb.org/subtopic&trid=2208821

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