v3.20.4
Sales Of Receivables (Summary of Receivables Sold) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Receivables [Abstract]      
Gross receivables sold/cash proceeds received $ 15,888 $ 11,989 $ 0
Collections reinvested under revolving agreement 14,888 7,689 0
Net cash proceeds received (remitted) 1,000 4,300 0
Net receivables sold 15,760 11,604 0
Obligations recorded (reversed) 271 530 $ 0
Initial sale of receivables $ 1,000 $ 4,300