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Cash and Cash Equivalents, Restricted Cash and Restricted Cash - Asbestos Cash and Cash Equivalents, Restricted Cash and Restricted Cash - Asbestos (Notes) | 12 Months Ended
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Mar. 31, 2019
Cash and Cash Equivalents, Restricted Cash and Restricted Cash - Asbestos [Abstract] |
Cash and Cash Equivalents Disclosure [Text Block] | Cash and Cash Equivalents, Restricted Cash and Restricted Cash - Asbestos The following table provides a reconciliation of Cash and cash equivalents, Restricted cash and Restricted cash - Asbestos reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows:
| 31 March
(Millions of US dollars) | 2019 |  | 2018
Cash and cash equivalents | $ | 78.7 |  |  | $ | 281.6 |
Restricted cash | 5.1 |  |  | 5.0 |
Restricted cash - Asbestos | 39.8 |  |  | 26.6 |
Total cash and cash equivalents, restricted cash and restricted cash - Asbestos | $ | 123.6 |  |  | $ | 313.2 |
Included in Restricted cash is US$5.1 million and US$5.0 million related to an insurance policy at 31 March 2019 and 2018, respectively, which restricts the cash from general corporate purposes. Included in Restricted cash - Asbestos is US$39.8 million and US$26.6 million at 31 March 2019 and 2018, respectively. The use of these assets is restricted to the settlement of asbestos claims and for the payment of the operating costs of AICF.

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- Definition Cash and Cash Equivalents, Restricted Cash and Restricted Cash - Asbestos [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -URI http://asc.fasb.org/topic&trid=2122426 + Details
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