Share-Based Compensation Plans - Performance Share Awards Narrative (Details) - Performance-based Awards - shares shares in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
PSA, vesting conditions period (in years)	3 years
Leadership Performance Plan Cycle 2018-2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)	0.5
Leadership Performance Plan Cycle 2017-2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)		0.6
Leadership Performance Plan Cycle 2016-2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)			0.7
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
PSA, actual shares issued, percent	0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
PSA, actual shares issued, percent	200.00%