Goodwill and Intangible Assets (Goodwill Rollforward) (Details) - USD ($) $ in Millions |
12 Months Ended | |
---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Goodwill Roll Forward | ||
Beginning Balance | $ 6,577 | $ 6,584 |
Foreign currency and other | 20 | (7) |
Ending Balance | 6,597 | 6,577 |
Goodwill, Impaired, Accumulated Impairment Loss | ||
Goodwill, accumulated impairments | 700 | |
IS | ||
Goodwill Roll Forward | ||
Beginning Balance | 275 | 282 |
Foreign currency and other | 20 | (7) |
Ending Balance | 295 | 275 |
Goodwill, Impaired, Accumulated Impairment Loss | ||
Goodwill, accumulated impairments | 673 | |
WM | ||
Goodwill Roll Forward | ||
Beginning Balance | 5,533 | 5,533 |
Foreign currency and other | 0 | 0 |
Ending Balance | 5,533 | 5,533 |
Goodwill, Impaired, Accumulated Impairment Loss | ||
Goodwill, accumulated impairments | 0 | |
IM | ||
Goodwill Roll Forward | ||
Beginning Balance | 769 | 769 |
Foreign currency and other | 0 | 0 |
Ending Balance | 769 | $ 769 |
Goodwill, Impaired, Accumulated Impairment Loss | ||
Goodwill, accumulated impairments | $ 27 |