Long-Term Debt (Debt Borrowings)(Details) $ in Millions |
6 Months Ended |
|---|---|
|
Jun. 30, 2016
USD ($)
| |
| Senior 2.75% Notes Due 2023 [Member] | |
| Principal amount | $ 1,100 |
| Interest rate | 2.75% |
| Maturity date | 2023 |
| Senior 3.15% Notes Due 2026 [Member] | |
| Principal amount | $ 2,200 |
| Interest rate | 3.15% |
| Maturity date | 2026 |
| Senior 4.05% Notes Due 2046 [Member] | |
| Principal amount | $ 1,430 |
| Interest rate | 4.05% |
| Maturity date | 2046 |
| Senior 1.625% Notes Due 2022 [Member] | |
| Principal amount | $ 700 |
| Interest rate | 1.625% |
| Maturity date | 2022 |
| Senior 2.35% Notes Due 2027 [Member] | |
| Principal amount | $ 1,400 |
| Interest rate | 2.35% |
| Maturity date | 2027 |
| Senior 3.20% Notes Due 2036 [Member] | |
| Principal amount | $ 1,000 |
| Interest rate | 3.20% |
| Maturity date | 2036 |
| Senior 3.40% Notes Due 2046 [Member] | |
| Principal amount | $ 1,400 |
| Interest rate | 3.40% |
| Maturity date | 2046 |