Long-Term Debt and Shareholders' Equity (Shareholders' Equity Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Debt And Equity [Abstract]
Shares outstanding (in shares)	150.5
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock and additional paid-in capital	$ 1,800
Common stock and additional paid-in capital change	$ 83
Common stock and additional paid-in capital percentage change	4.00%
Common stock repurchased (in shares)	1.7
Fair value of stock repurchased	$ 100
Average price per share of stock repurchased (in dollars per share)	$ 58.82
Accumulated other comprehensive income	$ (2,100)	$ (80)