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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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Amount of lessee's right to use underlying asset under operating lease.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

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Summary Adoption of New Accounting Standard Impact on Balance Sheet (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019
Assets
Right-of-use asset, operating leases	$ 147.3
Current liabilities
Operating lease liabilities - current (Note 4)	37.0
Non-current liabilities
Operating lease liabilities - non-current (Note 4)	$ 110.5
ASU 2016-02
Assets
Right-of-use asset, operating leases		$ 155.4
Current liabilities
Operating lease liabilities - current (Note 4)		38.7
Non-current liabilities
Operating lease liabilities - non-current (Note 4)		116.7
ASU 2016-02 \| Adjustments due to ASU 2016-02
Assets
Right-of-use asset, operating leases		155.4
Current liabilities
Operating lease liabilities - current (Note 4)		38.7
Non-current liabilities
Operating lease liabilities - non-current (Note 4)		$ 116.7