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Debt (Details) | May 29, 2015 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Mar. 28, 2013 USD ($)
--- | --- | --- | --- | ---
Credit Agreement dated March 28, 2013 |  |  |  |
Debt |  |  |  |
Borrowing capacity, maximum |  |  |  | $ 1,250,000,000
Credit agreement dated May 29, 2015 and August 28, 2015, as amended |  |  |  |
Debt |  |  |  |
Borrowing capacity, maximum | $ 750,000,000 |  |  |
Increase in maximum borrowing capacity | $ 375,000,000 |  |  |
Outstanding and unused Letters of Credit |  | $ 0 |  |
Maximum net leverage ratio | 4 |  |  |
Minimum interest coverage ratio | 2.5 |  |  |
Credit agreement dated May 29, 2015 and August 28, 2015, as amended | Federal funds effective rate |  |  |  |
Debt |  |  |  |
Interest rate, basis spread (as a percent) | 0.50% |  |  |
Credit agreement dated May 29, 2015 and August 28, 2015, as amended | Libor rate |  |  |  |
Debt |  |  |  |
Interest rate, basis spread (as a percent) | 1.00% |  |  |
Credit agreement dated May 29, 2015 and August 28, 2015, as amended | Revolver |  |  |  |
Debt |  |  |  |
Borrowing capacity, maximum |  | 500,000,000 |  |
Credit agreement dated May 29, 2015 and August 28, 2015, as amended | Swingline loans |  |  |  |
Debt |  |  |  |
Borrowing capacity, maximum |  | 75,000,000 |  |
Credit agreement dated May 29, 2015 and August 28, 2015, as amended | Letters of credit |  |  |  |
Debt |  |  |  |
Borrowing capacity, maximum |  | 100,000,000 |  |
Outstanding and unused Letters of Credit |  | 0 |  |
Estimate of Fair Value Measurement |  |  |  |
Debt |  |  |  |
Estimated market value of long-term and short-term debt |  | 3,300,000,000 | $ 3,300,000,000 |
Carrying Value Reported Value Measurement |  |  |  |
Debt |  |  |  |
Aggregate carrying value of long-term and short-term debt |  | $ 3,000,000,000 | $ 3,000,000,000 |

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