v3.3.1.900

Long-Term Debt (Debt Borrowings)(Details) $ in Millions | 12 Months Ended
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Dec. 31, 2015 USD ($)
Senior 4.60% Notes Due 2045 [Member] |
Principal amount | $ 1,700
Interest rate | 4.60%
Maturity date | 2045
Senior 3.375% Notes Due 2025 [Member] |
Principal amount | $ 1,500
Interest rate | 3.375%
Maturity date | 2025
Senior 4.60% Notes Due 2046 [Member] |
Principal amount | $ 1,490
Interest rate | 4.60%
Maturity date | 2046
Senior 4.40% Notes Due 2035 [Member] |
Principal amount | $ 800
Interest rate | 4.40%
Maturity date | 2035
Current Year Borrowings [Member] |
Principal amount | $ 5,490

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