Borrowing and Lines of Credit (Narrative) (Details) € in Millions |
9 Months Ended | ||
|---|---|---|---|
|
Sep. 30, 2017
USD ($)
|
Sep. 30, 2017
EUR (€)
|
Sep. 04, 2017
USD ($)
|
|
| Line of Credit Facility [Line Items] | |||
| Aggregate Line of Credit Facility Maximum Borrowing Capacity | $ 4,350,000,000 | ||
| Maximum Commercial Paper Borrowing Authority | 4,350,000,000 | ||
| Commercial paper, euro-denominated | 594,000,000 | € 500 | |
| Unsecured bridge loan credit agreement | $ 6,500,000,000 | ||
| Revolving Credit Agreement [Member] | |||
| Line of Credit Facility [Line Items] | |||
| Long-term Line of Credit | 0 | ||
| Line of Credit Facility, Maximum Borrowing Capacity | $ 2,200,000,000 | ||
| Line of Credit Facility, Expiration Date | Aug. 05, 2021 | ||
| Multicurrency Revolving Credit Agreement [Member] | |||
| Line of Credit Facility [Line Items] | |||
| Long-term Line of Credit | $ 0 | ||
| Line of Credit Facility, Maximum Borrowing Capacity | $ 2,150,000,000 | ||
| Line of Credit Facility, Expiration Date | Aug. 05, 2021 |