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Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Millions	Jan. 01, 2019	Dec. 31, 2019	Jan. 01, 2018
Significant Accounting Policies [Line Items]
Operating lease right-of-use assets		$ 1,685.6
Current portion of operating lease liabilities		371.6
Long-term operating lease liabilities		1,370.7
ASU 2016-02
Significant Accounting Policies [Line Items]
Operating lease right-of-use assets		1,700.0
Current portion of operating lease liabilities		400.0
Long-term operating lease liabilities		$ 1,400.0
Reduction in the opening balance of retained earnings	$ 8.4		$ 2.3
ASU 2018-02
Significant Accounting Policies [Line Items]
Reclassification from cumulative other comprehensive loss to retained earnings	8.3
Retained Earnings | ASU 2016-02
Significant Accounting Policies [Line Items]
Reduction in the opening balance of retained earnings	8.4
Retained Earnings | ASU 2018-02
Significant Accounting Policies [Line Items]
Reduction in the opening balance of retained earnings	$ (8.3)

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[Line Items] for Significant Accounting Policies [Table]

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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

+ References

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)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

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

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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)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

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

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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 (a)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

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Amount of increase (decrease) in accumulated other comprehensive income (AOCI) for reclassification to retained earnings of tax effect from remeasurement of deferred tax pursuant to Tax Cuts and Jobs Act.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL116659650-108580

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