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Capital Stock (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions			12 Months Ended
	Feb. 24, 2022	Feb. 25, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 09, 2021	Feb. 28, 2021
Class of Stock [Line Items]
Common stock, dividends, per share, declared (in dollars per share)		$ 0.80
Stock repurchase program, authorized amount						$ 3,000	$ 1,500
Common stock repurchased			$ 950	$ 66	$ 7
Preferred stock, shares authorized (in shares)			30,000,000	30,000,000
Subsequent Event
Class of Stock [Line Items]
Common stock, dividends, per share, declared (in dollars per share)	$ 0.22

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

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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