Goodwill and Other Intangibles (Amortized Intangible Assets) (Details) - USD ($) $ in Millions |
Dec. 31, 2020 |
Dec. 31, 2019 |
---|---|---|
Finite-Lived Intangible Assets [Line Items] | ||
Gross Cost | $ 4,099 | $ 3,874 |
Accumulated Amortization | 1,400 | 1,100 |
Net Carrying Amount | 2,699 | 2,774 |
Customer relationships | ||
Finite-Lived Intangible Assets [Line Items] | ||
Gross Cost | 3,713 | 3,494 |
Accumulated Amortization | 1,170 | 897 |
Net Carrying Amount | 2,543 | 2,597 |
Other | ||
Finite-Lived Intangible Assets [Line Items] | ||
Gross Cost | 386 | 380 |
Accumulated Amortization | 230 | 203 |
Net Carrying Amount | $ 156 | $ 177 |