Other Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | $ 5,663 | $ 5,260 |
| Accumulated Amortization | (1,960) | (1,755) |
| Net Carrying Amount | 3,703 | 3,505 |
| Unamortized intangible assets: | ||
| Intangible Assets, Gross (Excluding Goodwill) | 5,819 | 5,426 |
| Accumulated Amortization | (1,960) | (1,755) |
| Net Carrying Amount | 3,859 | 3,671 |
| Capitalized software | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 3,448 | 2,929 |
| Accumulated Amortization | (1,402) | (1,288) |
| Net Carrying Amount | 2,046 | 1,641 |
| Customer relationships | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 2,161 | 2,272 |
| Accumulated Amortization | (521) | (429) |
| Net Carrying Amount | 1,640 | 1,843 |
| Unamortized intangible assets: | ||
| Customer relationships | 156 | 166 |
| Other | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 54 | 59 |
| Accumulated Amortization | (37) | (38) |
| Net Carrying Amount | $ 17 | $ 21 |