v3.19.3.a.u2
Share-Based Payments - Outstanding Total Shareholder Return Units Activity (Details)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2019
USD ($)
$ / shares
shares
Total Shareholder Return Units (TSRUs) [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Share Units 179,999,000
Outstanding, Weighted-Average Grant Price Per Share Unit (in dollars per share) | $ / shares $ 35.33
Outstanding, Weighted-Average Remaining Contractual Term (Years) 2 years 7 months 6 days
Outstanding, Aggregate Intrinsic Value | $ $ 1,415
Vested, Share Units 57,345,000
Vested, Weighted-Average Grant Price Per Share Unit (in dollars per share) | $ / shares $ 31.04
Vested, Weighted-Average Remaining Contractual Term (Years) 1 year 3 months 18 days
Vested, Aggregate Intrinsic Value | $ $ 775
Expected to vest, Share Units 118,618,000
Expected to vest, Weighted-Average Grant Price Per Share Unit (in dollars per share) | $ / shares $ 37.23
Expected to vest, Weighted-Average Remaining Contractual Term (Years) 3 years 2 months 12 days
Expected to vest, Aggregate Intrinsic Value | $ $ 1,096
Settled, Share Units 7,953,671
Settled, Weighted-Average Grant Price Per Share Per Unit (in dollars per share) | $ / shares $ 27.33
Exercised during period, Share Units 2,173,131
Exercised during period, Weighted-Average Grant Price (in dollars per share) | $ / shares $ 30.68
Profit Units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Share Units 1,299,000
Outstanding, Weighted-Average Remaining Contractual Term (Years) 8 months 12 days
Outstanding, Aggregate Intrinsic Value | $ $ 51
Converted awards 844,871