Capital Stock (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Aug. 24, 2015
Class of Stock [Line Items]
Common Stock, shares authorized	750,000	750,000
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Dividends declared per share (in usd per share)	$ 1.12	$ 1.04	$ 0.96
Shares repurchased	678	772	536
Shares repurchased, value	$ 68	$ 61
2015 Stock Repurchase Program
Class of Stock [Line Items]
Authorized amount				$ 500
Shares repurchased	600	700
Shares repurchased, value	$ 60	$ 50
Remaining authorized repurchase amount	$ 228
Settlement of Employee Tax Withholding Obligations
Class of Stock [Line Items]
Shares repurchased	100	100
Shares repurchased, value	$ 8	$ 11