Exit and Implementation Costs (Movement in Exit and Implementation Costs) (Details) - Initiative [Member] - USD ($) $ in Millions |
6 Months Ended | 9 Months Ended | 12 Months Ended |
|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2025 |
Dec. 31, 2024 |
|
| Restructuring Reserve [Roll Forward] | |||
| Restructuring reserve, beginning of period | $ 57 | $ 0 | |
| Charges | 30 | 68 | |
| Cash paid | (38) | $ (49) | (11) |
| Restructuring reserve, end of period | 49 | 49 | 57 |
| Exit Costs [Member] | |||
| Restructuring Reserve [Roll Forward] | |||
| Restructuring reserve, beginning of period | 35 | 0 | |
| Charges | 1 | 35 | |
| Cash paid | (5) | (5) | 0 |
| Restructuring reserve, end of period | 31 | 31 | 35 |
| Implementation Costs [Member] | |||
| Restructuring Reserve [Roll Forward] | |||
| Restructuring reserve, beginning of period | 22 | 0 | |
| Charges | 29 | 33 | |
| Cash paid | (33) | (44) | (11) |
| Restructuring reserve, end of period | $ 18 | $ 18 | $ 22 |