XML 151 R136.htm IDEA: XBRL DOCUMENT v3.20.4
Stock-Based Compensation (Stock Appreciation Rights Outstanding and Exercisable) (Details) - Stock Appreciation Rights (SARs) [Member] - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 2 years 3 months 18 days  
Stock Appreciation Rights Outstanding, Shares 679,500,000 796,700,000
Stock Appreciation Rights Exercisable, Shares 458,000,000.0  
$34.06 to $46.78 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Range of Exercise Prices per Share, upper range limit $ 156.94  
Stock Appreciation Rights Outstanding, Shares 200,300,000  
Stock Appreciation Rights Outstanding, Weighted-Average Remaining Contractual Term (in years) 2 years 4 months 20 days  
Stock Appreciation Rights Outstanding, Aggregate Intrinsic Value $ 28.4  
Stock Appreciation Rights Exercisable, Shares 200,300,000  
Stock Appreciation Rights Exercisable, Weighted-Average Remaining Contractual Life (in years) 1 year 3 months 10 days  
Stock Appreciation Rights Exercisable, Aggregate Intrinsic Value $ 27.0  
Range of Exercise Prices per Share, lower range limit $ 99.64  
$51.11 to $81.14 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Range of Exercise Prices per Share, upper range limit $ 214.63  
Stock Appreciation Rights Outstanding, Shares 256,000,000.0  
Stock Appreciation Rights Outstanding, Weighted-Average Remaining Contractual Term (in years) 4 years 5 months 26 days  
Stock Appreciation Rights Outstanding, Aggregate Intrinsic Value $ 16.4  
Stock Appreciation Rights Exercisable, Shares 214,000,000.0  
Stock Appreciation Rights Exercisable, Weighted-Average Remaining Contractual Life (in years) 4 years 4 months 20 days  
Stock Appreciation Rights Exercisable, Aggregate Intrinsic Value $ 13.9  
Range of Exercise Prices per Share, lower range limit $ 205.53  
$92.64 to $126.31 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Range of Exercise Prices per Share, upper range limit $ 278.00  
Stock Appreciation Rights Outstanding, Shares 223,200,000  
Stock Appreciation Rights Outstanding, Weighted-Average Remaining Contractual Term (in years) 6 years 4 months 28 days  
Stock Appreciation Rights Outstanding, Aggregate Intrinsic Value $ 2.2  
Stock Appreciation Rights Exercisable, Shares 43,700,000  
Stock Appreciation Rights Exercisable, Weighted-Average Remaining Contractual Life (in years) 6 years  
Stock Appreciation Rights Exercisable, Aggregate Intrinsic Value $ 0.7  
Range of Exercise Prices per Share, lower range limit $ 257.08