Share Repurchase Program (Purchase of Outstanding Shares) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended	9 Months Ended
		Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Share Repurchase Program [Abstract]
Number of shares purchased		0.5	1.9	0.5
Average price paid per share	[1]	$ 46.11	$ 30.51	$ 46.11
Cost of share purchased		$ 25	$ 59	$ 25

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