Share-Based Compensation Plans (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Oct. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 33	$ 26	$ 29
Proceeds from exercise of employee stock options	19	$ 20	$ 13
Tax benefit from the exercise of stock options	$ 6
Shares awarded	262
Shares outstanding	1,827	1,961
Non-vested options outstanding	700	700	600
Weighted average grant date fair value	$ 84.66	$ 74.00	$ 69.30
Aggregate intrinsic value of outstanding stock options	$ 102
Aggregate intrinsic value of exercisable stock options	79
Total intrinsic value of options exercised	27	$ 20	$ 15
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized compensation expense	$ 7
Weighted average period	1 year 8 months 12 days
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized compensation expense	$ 23
Weighted average period	1 year 9 months 18 days
Shares awarded	230
Performance Based Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized compensation expense	$ 13
Weighted average period	2 years 6 months
Requisite service periods	3 years
Target payout percentage	100.00%
2011 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares initially available for awards				18,000
Shares available for future grant	4,000