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 and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Subsequent Events (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		1 Months Ended	3 Months Ended
	Jul. 19, 2021	Jul. 31, 2021	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Subsequent Event [Line Items]
Stock Repurchased and Retired During Period, Value			$ 42	$ 58	$ 60
Subsequent Event
Subsequent Event [Line Items]
Dividend per share (usd per share)	$ 0.125
Common Stock [Member]
Subsequent Event [Line Items]
Stock Repurchased and Retired During Period, Shares			2.0	2.0	3.0
Common Stock [Member] \| Subsequent Event
Subsequent Event [Line Items]
Stock Repurchased and Retired During Period, Value		$ 11
Stock Repurchased and Retired During Period, Shares		0.4