Acquisitions and Divestitures - Acquisitions (Details) $ in Millions |
1 Months Ended | 6 Months Ended | |
|---|---|---|---|
|
Oct. 31, 2017
USD ($)
|
Jun. 30, 2018
USD ($)
item
|
Jun. 30, 2017
item
|
|
| Supplemental information: | |||
| Cash paid, net of cash acquired | $ (13) | ||
| Number of business combinations completed | item | 0 | 0 | |
| Scott Safety | |||
| Supplemental information: | |||
| Cash paid, net of cash acquired | $ 2,000 | ||
| Adjustments to purchase price allocation | $ 16 | ||