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Debt (Tables) | 3 Months Ended
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Jun. 30, 2018
Debt Disclosure [Abstract] |
Schedule of Debt Instruments | Debt consists of the following:
|  | June 30, 2018 |  | March 31, 2018
|  | (millions)
$300 million 2.125% Senior Notes(a) |  | $ | 299.0 |  |  | $ | 298.1 |
$300 million 2.625% Senior Notes(b) |  | 288.0 |  |  | 288.0 |
Borrowings outstanding under credit facilities |  | — |  |  | 10.1 |
Total debt |  | 587.0 |  |  | 596.2 |
Less: short-term debt and current portion of long-term debt |  | 299.0 |  |  | 308.2 |
Long-term debt |  | $ | 288.0 |  |  | $ | 288.0 |
(a) | The carrying value of the 2.125% Senior Notes as of June 30, 2018 and March 31, 2018 reflects adjustments of $0.9 million and $1.6 million, respectively, associated with the Company's related interest rate swap contract (see Note 12). The carrying value of the 2.125% Senior Notes is also presented net of unamortized debt issuance costs and discount of $0.1 million and $0.3 million as of June 30, 2018 and March 31, 2018, respectively.
(b) | The carrying value of the 2.625% Senior Notes as of June 30, 2018 and March 31, 2018 reflects adjustments of $11.0 million and $10.8 million, respectively, associated with the Company's related interest rate swap contract (see Note 12). The carrying value of the 2.625% Senior Notes is also presented net of unamortized debt issuance costs and discount of $1.0 million and $1.2 million as of June 30, 2018 and March 31, 2018, respectively.

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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