XML 143 R125.htm IDEA: XBRL DOCUMENT v3.20.4
Capital Structure - Summary of Changes in Shares Repurchased (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Schedule of Capitalization, Equity [Line Items]      
Total number of shares purchased (in shares) 6,062,783 36,301,882 35,234,664
Shares repurchased under May 24, 2018 Accelerated Repurchase Agreement      
Schedule of Capitalization, Equity [Line Items]      
Total number of shares purchased (in shares)     10,829,903
Amounts paid for shares and share equivalents purchased (in millions)     $ 354
Shares repurchased under September 5, 2018 Accelerated Repurchase Agreement      
Schedule of Capitalization, Equity [Line Items]      
Total number of shares purchased (in shares)     13,307,130
Amounts paid for shares and share equivalents purchased (in millions)     $ 500
Other repurchases      
Schedule of Capitalization, Equity [Line Items]      
Total number of shares purchased (in shares) 6,062,783 26,863,211 11,097,631
Amounts paid for shares and share equivalents purchased (in millions) $ 197 $ 1,008 $ 396
Repurchases under February 28, 2019 Accelerated Share Repurchase Agreement      
Schedule of Capitalization, Equity [Line Items]      
Total number of shares purchased (in shares)   9,438,671  
Amounts paid for shares and share equivalents purchased (in millions)   $ 400  
Equivalent shares purchased in lieu of tax withholding on equity compensation issuances      
Schedule of Capitalization, Equity [Line Items]      
Total number of shares purchased (in shares) 711,248 936,928  
Average price paid per share (in shares) $ 38.23 $ 38.78  
Amounts paid for shares and share equivalents purchased (in millions) $ 27 $ 36  
Capital Allocation Plan      
Schedule of Capitalization, Equity [Line Items]      
Total number of shares purchased (in shares) 6,774,031 37,238,810 35,234,664
Average price paid per share (in shares) $ 33.05 $ 38.79 $ 35.48
Amounts paid for shares and share equivalents purchased (in millions) $ 224 $ 1,444 $ 1,250