Share Repurchase Program (Purchase of Outstanding Shares) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended	6 Months Ended
		Jun. 30, 2022	Jun. 30, 2022
Share Repurchase Program [Abstract]
Number of shares purchased		0.8	1.9
Average price paid per share	[1]	$ 22.16	$ 30.51
Cost of share purchased		$ 19	$ 59

[1] The average price paid per share is calculated on a trade date basis and excludes commissions.