Borrowings and Capital Lease Obligations (Senior Notes Issued by SAIIDAC) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Carrying amount	$ 22,967.8	$ 1,594.8
Shire Acquisitions Investment Ireland Designated Activity Company \| Senior Notes
Debt Instrument [Line Items]
Aggregate Amount	12,100.0
Carrying amount	12,039.2
Shire Acquisitions Investment Ireland Designated Activity Company \| Senior Notes \| Fixed-rate notes due 2019
Debt Instrument [Line Items]
Aggregate Amount	$ 3,300.0
Coupon Rate	1.90%
Effective Interest Rate	2.05%
Carrying amount	$ 3,287.5
Shire Acquisitions Investment Ireland Designated Activity Company \| Senior Notes \| Fixed-rate notes due 2021
Debt Instrument [Line Items]
Aggregate Amount	$ 3,300.0
Coupon Rate	2.40%
Effective Interest Rate	2.53%
Carrying amount	$ 3,283.0
Shire Acquisitions Investment Ireland Designated Activity Company \| Senior Notes \| Fixed-rate notes due 2023
Debt Instrument [Line Items]
Aggregate Amount	$ 2,500.0
Coupon Rate	2.875%
Effective Interest Rate	2.97%
Carrying amount	$ 2,487.9
Shire Acquisitions Investment Ireland Designated Activity Company \| Senior Notes \| Fixed-rate notes due 2026
Debt Instrument [Line Items]
Aggregate Amount	$ 3,000.0
Coupon Rate	3.20%
Effective Interest Rate	3.30%
Carrying amount	$ 2,980.8

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 9

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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-Name Accounting Standards Codification
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-Section 45
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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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