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Debt (Details) |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May 27, 2016 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2016 EUR (€) credit_facility | Jun. 30, 2016 USD ($) credit_facility | Mar. 01, 2016 USD ($) | Dec. 31, 2015 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Number of credit facilities | credit_facility |  |  |  | 2 | 2 |  |
Commercial paper [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total debt |  |  |  |  | $ 241,000,000 |  | $ 50,000,000
Weighted average commercial paper outstanding |  | $ 304,000,000 | $ 240,000,000 |  |  |  |
Weighted-average interest rates (as a percent) |  | 0.59% | 0.41% |  |  |  |
3.875% due in December 2025 [Member] | Notes Payable, Other Payables [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Face amount of debt |  |  |  |  |  | $ 750,000,000 |
Debt interest rate percentage (as a percent) |  |  |  | 3.875% | 3.875% | 3.875% |
Credit Facility Expiring March 2017 [Member] | Line of Credit [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  | $ 400,000,000 |  |
Foreign Line of Credit [Member] | 2020 Facility [Member] | Line of Credit [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  | 900,000,000 |  |
Commercial paper [Member] | US Commercial Paper Program [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  | $ 900,000,000 |  |
Commercial paper [Member] | European Multi Currency Paper Program [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity | € |  |  |  | € 300,000,000 |  |  |
Notes Payable, Other Payables [Member] | 3.125% [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt interest rate percentage (as a percent) | 3.125% |  |  |  |  |  |
Senior notes matured and repaid | $ 500,000,000 |  |  |  |  |  |

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